C/2011 L4 (PANSTARRS)

C/2011 L4 (PANSTARRS)
2014 July 17.79 UT: m1=18.6: CCD, Dia.=0.2′, Tail=&0.3′ in PA: 131 deg ... 0.7-m f/4.0 reflector + CCD... S. Nazarov & T. Prystavski (Crimean Astrophysical Observatory, MPC 095, Crimea-Nauchnij)
2014 July 15.90 UT: m1=17.1 CCD, Dia.=0.34′... 0.32-m f/8.0 astrograph + CCD... A. Novichonok & T. Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)
2014 Apr. 15.95 UT: m1=16.3: CCD, Dia.=0.37′... 0.7-m f/4.0 reflector + CCD... S. Nazarov & T. Prystavski (Crimean Astrophysical Observatory, MPC 095. Crimea-Nauchnij)
2014 Feb. 28.41 UT: m1=16.4: CCD, Dia.=0.38′... 0.43-m f/6.8 astrograph + CCD + f/4.5 focal reducer... A. Novichonok & T. Prystavski (iTelescope observatory, H06. Remotely Mayhill, U.S.A.)
2014 Feb. 10.52 UT: m1=16.4: CCD, Dia.=0.35′... 0.43-m f/6.8 astrograph + CCD + f/4.5 focal reducer... A. Novichonok & T. Prystavski (iTelescope observatory, H06. Remotely Mayhill, U.S.A.)
2014 Jan. 07.53 UT: m1=15.6 CCD, Dia.=0.6′ Tail= 0.9′ in PA: 30 deg ... [T20] 0.1-m f/5.0 astrograph + CCD... A. Novichonok & T. Prystavski (iTelescope observatory, H06, remotely Mayhill, U.S.A.)
2013 Nov. 04.97 UT: m1=15.0 CCD, Dia.=0.4’... CCD images unfiltered... Pierre Laporte  (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 Oct. 13.40 UT: m1=[12.6... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan) [Already too faint to see]
2013 Oct. 12.41 UT: m1=[12.9... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan) [Already too faint to see]
2013 Oct. 11.42 UT: m1=[12.6... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan) [Already too faint to see]
2013 Sep. 09.05 UT: m2=16.0 CCD, Dia.=0.4’, Tail= 1,8′ PA: 52° ... CCD images unfiltered... Stéphane Potvin (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 256-110365 mag.=15.42]
2013 Sep. 07.85 UT: m1=12.9, Dia.=2′, DC=3... 42-cm L f:5 (81x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Sep. 07.12 UT: m1=13.0, Dia.=0.9′, DC=3... 30.5-cm L f/4.9 (188x)... Todd Augustyniak (Afton Forest Preserve, Dekalb, Illinois USA)
2013 Sep. 06.85 UT: m1=12.9, Dia.=2.1′, DC=3... 42-cm L f:5 (81x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Sep. 06.84 UT: m1=13.2, Dia.=1.2′, DC=4... 50.8-cm L (189x)... Sandor Szabo (Hungary)
2013 Sep. 06.83 UT: m1=13.8, Dia.=1.5′, DC=3... 35-cm reflector (239x)... Jakub Cerny (Senohraby, Czech Republic)
2013 Sep. 06.12 UT: m1=13.4 CCD, Dia.=0.9’, Tail= 1′ PA: 66°... CCD images unfiltered... Pierre Laporte (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 258-112621 mag.=13.68]
2013 Sep. 05.85 UT: m1=12.9, Dia.=2′, DC=3... 42-cm L f:5 (81x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Sep. 06.10 UT: m1=13.3 CCD, Dia.=1.2′, Tail= 2.5′ in PA: 110-10 deg ... 0.11-m f/5.0 refractor + CCD... A. Novichonok & T.Prystavski (iTelescope observatory, H06. Remotely Mayhill, U.S.A.)
2013 Sep. 04.82 UT: m1=13.2, Dia.=2′, DC=1... 32-cm L f/5 (72x)... Uwe Pilz (Leipzig, Germany)
2013 Sep. 04.82 UT: m1=13.4, Dia.=1.6′, DC=3... 35-cm reflector (107x)... Jakub Cerny (Senohraby, Czech Republic)
2013 Sep. 02.77 UT: m1=12.7, Dia.=0.7′, DC=3... 20-cm L (222x)... Artyom Novichonok (TAU station, Northern Caucasus, Russia)
2013 Aug. 30.06 UT: m1=13.0 CCD, Dia.=0.9’, Tail= 3′ PA: 16°... CCD images unfiltered... Pierre Laporte (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 262-126540 mag.=13.72]
2013 Aug. 28.04 UT: m1=[12.0... 19-cm R f/14 (100x)... Isbel González González (Guayos, Sancti Spíritus, Cuba)
2013 Aug. 25.08 UT: m1=11.5 CCD, Dia.=0.2’, Tail= 1′ PA: 48°... CCD images unfiltered... Clermont Vallière (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 265-130842 mag.=14.23]
2013 Aug. 22.05 UT: m1=12.9 CCD, Dia.=0.5’, Tail= 1′ PA: 70°... CCD images unfiltered... Clermont Vallière (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 266-133977 mag.=13.48]
2013 Aug. 19.06 UT: m1=13.7 CCD, Dia.=0.4’... CCD images unfiltered... Clermont Vallière (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 270-130671 mag.=14.37]
2013 Aug. 12.14 UT: m1=[11.5, Negative ... 15-cm SCT f:10 (125x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2013 Aug. 11.17 UT: m1=12.6, Dia.=1.5′, DC=3/... 30.5-cm L (188x)... Todd Augustyniak (Coral Woods Conservation Area, Marengo, Illinois, USA)
2013 Aug. 11.08 UT: m1=10.6 CCD, Dia.=4′ ... CCD images unfiltered... Pierre Laporte (Cd’OA, Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 275-124348 mag.=12.74]
2013 Aug. 07.93 UT: m1=11.9, Dia.=2.2′, DC=3... 30-cm L f/5 (60x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland)
2013 Aug. 07.07 UT: m1=11.5 CCD, Dia.=5′ ... CCD images unfiltered... Pierre Laporte (Cd’OA, Monts Notre-Dame, Québec, Canada) [comparison star Tycho 3477 760 mag.=11.773]
2013 Aug. 06.10 UT: m1=14.6 CCD, Dia.=1.3’... CCD images unfiltered... Clermont Vallière (Cd’OA Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 233-196181 mag.=15.19]
2013 Aug. 05.89 UT: m1=11.7, Dia.=3.0′, DC=5, Tail= 5’ long to PA: 80 deg ... 50.8-cm L (78x)... Sandor Szabo (Hungary)
2013 Aug. 05.88 UT: m1=11.9, Dia.=2.9′, DC=3... 35-cm reflector (107x)... Jakub Cerny (Senohraby, Czech Republic)
2013 Aug. 04.26 UT: m1=12.9, Dia.=1.2′, DC=3... 30.5-cm L (250x)... Todd Augustyniak (Wildcat Mountain State Park, Ontario, Wisconsin, USA) [More diffuse than previous month]
2013 Aug. 01.08 UT: m1=11.5 CCD, Dia.=6’... CCD images unfiltered... Pierre Laporte (Cd’OA, Monts Notre-Dame, Québec, Canada) [comparison star 3UCAC 283-116517 mag.=13.77]
2013 Aug. 01.00 UT: m1=10.3, Dia.=4′, DC=3/... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [En comparación con mi observación previa de Jul. 18.06, el cometa muestra un mayor diámetro de coma y por ello una más brillante estimación de la m1]
2013 July 30.91 UT: m2=14.6 CCD, Dia.=&5′ Tail= 9′ in PA: 104-0-355 deg ... 0.15-m f/7.3 refractor + CCD... A. Novichonok & T.Prystavski (AstroCamp Observatory I89. Remotely Nerpio, Spain)
2013 July 18.06 UT: m1=10.8, Dia.=3′, DC=4... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2013 July 18.02 UT: m1=11.1, Dia.=2.3′, DC=3/... 42-cm L f:5 (66x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 16.02 UT: m1=11.1, Dia.=2.2′, DC=3/... 42-cm L f:5 (66x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 12.96 UT: m1=10.6, Dia.=0.7′, DC=3... 32-cm L F/5 (48x)... Uwe Pilz (Leipzig, Germany)
2013 July 10.85 UT: m1=10.9, Dia.=1.5′, DC=5... 25.4-cm L(37.5x, 120x)... Danil Sidorko (Korenovsk, Russia)
2013 July 09.96 UT: m1=10.9, Dia.=2.5′, DC=3/... 42-cm L f:5 (66x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 09.84 UT: m1=10.8, Dia.=1.8′, DC=6... 25.4-cm L (37.5x, 120x)... Danil Sidorko (Korenovsk, Russia)
2013 July 09.00 UT: m1=10.9, Dia.=3.5′, DC=1... 20-cm L (42x)... Alex Scholten (Eerbeek, Netherlands)
2013 July 08.96 UT: m1=10.8, Dia.=2.5′, DC=4... 42-cm L f:5 (66x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 08.94 UT: m1=11.2, Dia.=3.0’, DC=4... 50.8-cm L (78x)... Sandor Szabo (Hungary) [Coma is elongated to PA 95 deg, tail is very wide in 2 part, length 12’]
2013 July 08.02 UT: m1=10.8, Dia.=2.5′, DC=4... 42-cm L f:5 (66x)... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 07.85 UT: m1=10.6, Dia.=2′, DC=5... 25.4-cm L (120x, 240x)... Danil Sidorko (Korenovsk, Russia)
2013 July 06.96 UT: m1=10.1... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 July 06.00 UT: m1=10.4, Dia.=~4′, DC=1... 20-cm L (42x)... Alex Scholten (Eerbeek, Netherlands)
2013 July 05.83 UT: m1=10.6, Dia.=3.2′, DC=5... 25.4-cm L (37.5x, 120x)... Danil Sidorko (Korenovsk, Russia)
2013 July 04.85 UT: m1=10.5, Dia.=3.2′, DC=5... 25.4-cm L (120x)... Danil Sidorko (Korenovsk, Russia)
2013 July 03.58 UT: m1=10.2, Dia.=3′, DC=4... 20-cm L F/5 (30x)... Man-To Hui (Nhut Thung Pau, Canton, China)  [city lights]
2013 July 02.96 UT: m1=10.1, Dia.=3.5′, DC=4... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 01.96 UT: m1=10.1, Dia.=3.5′, DC=4... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 July 01.88 UT: m1=10.3, Dia.=4.3×2′, DC=5... 25.4-cm L (48x, 120x)... Danil Sidorko (Korenovsk, Russia)
2013 July 01.01 UT: m1=10.1, Dia.=4′, DC=4, Tail= 0.2º in PA: 90º ... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Cola de polvo en abanico]
2013 June 30.81 UT: m1=10.4, Dia.=3.5×2′, DC=6... 25.4-cm L (120x)... Danil Sidorko (Korenovsk, Russia)
2013 June 29.92 UT: m1=10.6, Dia.=4′, DC=3, Tail= 12′... 23.5-cm SCT(67x)... Carlos Labordena (Castellón, España)
2013 June 20.00 UT: m1=10.0, Dia.=3.5′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 19.01 UT: m1=10.0, Dia.=3′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 17.94 UT: m1=9.9, Dia.=3′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 17.01 UT: m1=9.9, Dia.=3.5′, DC=3/... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 16.94 UT: m1=10.0 CCD + V filter, Dia.=5.3′, DC=5... 3.6-cm A f/2.8 (17x10s)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Stacking and photometry: IRIS, Cat. (TK), comp. star 9.56 mag and B-V=0.61, comet alt. 60 deg.]
2013 June 15.99 UT: m1=9.7, Dia.=3′, DC=5, Tail= 20′... 11×80 B... Carlos Labordena (Castellón, España)
2013 June 15.96 UT: m1=9.8, Dia.=4′ DC=3... 42-cm L (200x)... Alex Scholten (Eerbeek, Netherlands)... slightly oval coma in PA = 135 degrees
2013 June 15.93 UT: m1=9.9 CCD + V filter, Dia.=5.3′, DC=5... 3.6-cm A f/2.8 (15x10s)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Stacking and photometry: IRIS, Cat. (TK), comp. star 9.56 mag and B-V=0.61. Clouds]
2013 June 15.04 UT: m1=9.8, Dia.=3′, DC=6, Tail= 0.2º in AP: 120º... 25×100 B... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Cola de polvo en abanico, de 0.2º en PA 120º. Anticola más débil, de 0.3º en AP 350º.]
2013 June 15.00 UT: m1=9.2, Dia.=9′ DC=1... 15×80 B... Alex Schotlen (Eerbeek, Netherlands)
2013 June 14.99 UT: m1=9.7, Dia.=5′ DC=2... 42×200 L... Alex Scholten (Eerbeek, Netherlands)
2013 June 12.92 UT: m1=9.6, Dia.=3′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 11.96 UT: m1=8.8, Dia.=4′, DC=3... 8×56 B... Sandor Szabo (Hungary)
2013 June 11.92 UT: m1=9.6, Dia.=3′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 June 09.99 UT: m1=9.7 CCD + V filter, Dia.=5.1′, DC=5... 3.6-cm A f/2.8 (16x10s)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Stacking and photometry: IRIS, Cat. (TK), comp. star 9.07 mag and B-V=0.62. Clouds and twilight]
2013 June 08.99 UT: m1=9.1, Dia.=8′, DC=1... 15×80 B... Alex Scholten (Eerbeek, Netherlands)
2013 June 08.00 UT: m1=9.1, Dia.=6′, DC=4... 20-cm L (42x)... Alex Schotlen (Eerbeek, Netherlands)
2013 June 06.99 UT: m1=8.9, Dia.=8′, DC=1... 15×80 B... Alex Scholten (Eerbeek, Netherlands)
2013 June 06.16 UT: m1=9.0, Dia.=5′, DC=3, Tail= Not visible... 15-cm SCT (37x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2013 June 05.97 UT: m1=8.2, Dia.=4′, DC=1, Tail= 0.3 deg. in PA: 190 deg ... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 June 04.04 UT: m1=8.9, Dia.=4′, DC=5, Tail= 0.6º en AP: 150º ... 25×100 B... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España ) [ Cola de polvo en abanico, de 0.6º en AP 150º. Anticola de 2.4º en AP 0º]
2013 June 02.96 UT: m1=8.1, Dia.=4’, DC=2... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 June 01.98 UT: m1=8.8, Dia.=~10′, DC=4... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 58 degrees, oval coma (part of tail included in estimation?)... weak broad tail of about 0.5 degrees in PA~170-190 degrees, very weak anti-tail of about 0.7 degrees in PA~15 degrees (with 42x200L)]
2013 June 01.94 UT: m1=8.7, Dia.=4′, DC=5, Tail= 35′... 11×80 B... Carlos Labordena (Castellón, España)
2013 June 01.16 UT: m1=9.0, Dia=4´, DC=3, Tail= Not visible... 15-cm SCT (37x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2013 May  31.93 UT: m1=8.7, Dia.=4′, DC=5, Tail= 0.5º in PA: 185º... 25×100 B... Juan José González (Los Barrios de Nistoso, alt. 1310 m, León, España) [Cola de polvo en abanico, de 0.5º en AP 185º. Anticola bien definida, de 3.9º en AP 15º]
2013 May  31.66 UT, m1=8.8, Dia.=3′.7, DC=5... 20-cm reflector... Man-To Hui (Nhut Thung Pau, Canton, China) [road lights]
2013 May  28.98 UT: m1=9.9, Dia=2.5′, DC=4, Tail= 0.3 deg in PA: 200 deg, antitail 2.8 deg in PA: 40 deg ... 26-cm L f:5 (x42)... Nicolas Biver (Ablis, France) [Again quite impressive antitail, and small coma lost in fuzy tail + ~1′ jets in PA 100-180 (x97)]
2013 May  28.97 UT: m1=8.5, Dia.=12′, DC=3, Tail= 0.5 deg in PA: 220 deg, antitail 5.5 deg in PA: 45 deg ... 7×50 B... Nicolas Biver (Ablis, France) [From moderately dark skies just at monnrise – impressive antitail, but I am not sure what I am measuring for the coma (most of normal tail)]
2013 May  28.92 UT: m1=8.5, Dia.=4′, DC=5, Tail= 0.6º en PA: 220º... 25×100 B... Juan José González (Llamas de Rueda, alt. 1005 m, León, España) [Estimación realizada antes del orto lunar. Cola de polvo en abanico, de 0.6º en AP 220º. Anticola bien definida, de 5.1º en AP 40º, también observable en 10x50B. Cielo muy claro de montaña.]
2013 May  20.86 UT: m1=8.8, Dia.=4′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 May  19.22 UT: m1=7.5, DC=3... 10×50 B... Jean-François Viens (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 May  19.04 UT: m1=8.7, Dia.=4′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 May  18.90 UT: m1=8.0, Dia.=1.5′, DC=3, Tail= 0.1 deg. PA: 320 deg ... 16×70 B... Uwe Pilz (Leipzig, Germany)
2013 May  18.00 UT: m1=9.0 CCD + V filter, Dia.=4.1′, DC=6... 3.6-cm A f/2.8 (25x6s)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Stacking and photometry: IRIS, Cat. (HV), comp. star HIP114722 8.27 mag and B-V=0.65, crystall clear sky]
2013 May  15.90 UT: m1=7.9, Dia.=6′, DC=4, Tail= 0.4º en AP: 310º... 10×50 B... Juan José González (Alto del Trichero – Soto y Amio, alt. 1190 m, León, España) [En 25x100B: cola en abanico entre 300º y 100º. Forma bien definida en dirección solar, similar a una anticola, de longitud 1.1º en AP 90º, también observable en 10x50B]
2013 May  15.85 UT: m1=8.3, Dia.=4′, DC=3... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 May  15.15 UT: m1=7.0, DC=7... 10×42 B... Pierre Laporte (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 May  13.92 UT: m1=8.4, Dia.=~6′ DC=4... 15x80B... Alex Scholten (Eerbeek, Netherlands) [altitude 42 degrees, tail of about 0.2 degrees in PA~315 degrees... difficult visible due to nearby bright stars, comet only 13′ from Gamma Cephei]
2013 May  12.88 UT: m1=8.5, Dia.=2′, DC=d5, Tail= 0.17′ PA:160° ... 12-cm R F/5 (15x)... Uwe Pilz (Leipzig, Germany)
2013 May  11.98 UT: m1=8.7 CCD + V filter, Dia.=4.1′, DC=6, Tail= 0.68 deg. in PA: 312 deg ... 3.6-cm A f/2.8... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Cat.(TK). Stacking and photometry in IRIS using 24x4s frames, 16dark, 12flat, 15bias. Comet alt. 44.6 deg. Antitail: 0.93 deg. in PA 100 deg.]
2013 May  11.93 UT: m1=8.3, Dia.=4′, DC=s5, Tail= 0.65 deg. in PA: 316 deg ... 30-cm L f/5 (60x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Cat.(TK), Morris’ method, comet alt. 43 deg. Antitail: 1.18 deg in PA 110 deg.]
2013 May  11.81 UT: m1=7.6, Dia.=5′, DC=5, Tail= 35′... 11×80 B... Carlos Labordena (Castellón, España)
2013 May  11.02 UT: m1=7.9, Dia.=5′, DC=4/, Tail= 0.6º in PA: 320º... 10×50 B... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [En 20 -cm SCT (77x): cola en abanico entre 300º y 110º]
2013 May  09.91 UT: m1=8.0, Dia.=~7′ DC=3... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 38 degrees, tail of about 0.6 degrees in PA~320-15 degrees]
2013 May  09.01 UT: m1=7.8, Dia.=3.3′, DC=s5... 10-cm M f/10 (40x)... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Cat. (TK), Morris’ method, clear sky]
2013 May  08.95 UT: m1=8.6 CCD + V filter, Dia.=3.4′, DC=6, Tail= 0.93 deg. in PA: 316 deg ... 6.8-cm R f/3.8... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Cat.(AQ). Stacking and photometry in IRIS using 21x15s frames, 17dark, 15flat, 27bias. Clear sky, comet alt. 41 deg. Antitail: 1.37 deg. in PA 95 deg.]
2013 May  06.76 UT: m1=7.6, Dia.=9′, DC=6... 15×70 B... Danil Sidorko (Korenovsk, Russia)
2013 May  06.00 UT: m1=7.9, Dia.=~6′ DC=3... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 38 degrees, tail of about 0.7 degrees in PA~315-350 degrees]
2013 May  05.89 UT: m1=7.3, Dia.=10′, DC=s5... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 May  05.21 UT: m1=7.0, DC=4... 10×50 B... Jean-François Viens (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 May  05.11 UT: m1=7.6, Dia.=5′, DC=5, Tail= 20′... 11×80 B... Carlos Labordena (Castellón, España)
2013 May  04.21 UT: m1=6.8, DC=4... 10×50 B... Jean-François Viens (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 May  03.90 UT: m1=7.5, Dia.=8′, DC=s6, Tail= 0.5 deg. in PA: 340 deg ... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 May  03.90 UT: m1=7.3, Dia.=5′, DC=4/, Tail= 0.4º en AP: 330º... 10×50 B... Juan José González (Puerto de Aralla, alt. 1500 m, León, España) [En 20 -cm SCT (77x): cola en abanico entre 310º y 100º]
2013 May  02.87 UT: m1=7.6, Dia.=~6′ DC=2... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 30 degrees, fair conditions (hazy); only hint of tail visible]
2013 May  02.08 UT: m1=14.5, DC=4... Visual Aperture 36″ F/3.5... Jean-François Viens (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 May  01.92 UT: m1=7.4, Dia.=~8′ DC=3... 15x80B... Alex Scholten (Eerbeek, Netherlands) [altitude 30 degrees, good conditions; tail of about 0.6 degrees in PA 335 degrees]
2013 Apr. 30.94 UT: m1=7.3, Dia.=~8′ DC=3... 15x80B... Alex Scholten (Eerbeek, Netherlands) [altitude 30 degrees, good conditions; tail of about 0.6 degrees in PA 340 degrees]
2013 Apr. 28.91 UT: m1=7.2, Dia.=4′, DC=5, Tail= 0.4 deg. in PA: 340 deg ... 10×50 B... Juan José González (Ardoncino, alt. 875 m, León, España) [En 20 -cm SCT (77x): cola en abanico entre 330º y 100º]
2013 Apr. 28.88 UT: m1=7.6, Dia.=~8′, DC=3... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 28.0 degrees, good conditions; tail of about 0.6 degrees in PA 315-340 degrees]
2013 Apr. 28.09 UT: m1=9.1 CCD, Dia.=1.3′, DC=6... 25-cm L +CCD +Rc filter... Toni Scarmato (Calabria, Italy)
2013 Apr. 26.08 UT: m1=7.0, Dia.=3′, DC=5/... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 24.09 UT: m1=6.6, Dia.=2.5′, DC=5/... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 22.83 UT: m1=7.1, Dia.=5′, DC=5, Tail= 0.22 deg. in PA: 349 deg ... 20×60 B... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Cat. HV, Moonlight!]
2013 Apr. 22.82 UT: m1=7.6 CCD + V filter, Dia.=5.1′, DC=6, Tail= 0.21 deg. in PA: 349 deg ... 3.6-cm A f/3... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Cat. HV – 5 comp. stars with B-V=(0.52-0.69) on the same frame. Processing in DeepSkyStacker-median filter using 21x2s frames, 12dark, 12flat, 15bias. Photometry in IRIS on selected green channel. Moonlight]
2013 Apr. 22.47 UT: m1=6.5, Dia.=4′, DC=6, Tail= visible... 15-cm SCT (37x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2013 Apr. 22.33 UT: m1=5.9, DC=7... 7×35 B... Pierre Laporte (Cd’OA des Monts Notre-Dame, Québec, Canada)
2013 Apr. 22.09 UT: m1=6.4, Dia.=3′, DC=5, Tail= 0.25° in PA: 350°... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 21.83 UT: m1=6.9, Dia.=6′, DC=S5, Tail= 0.42 deg. in PA: 345 deg.... 20×60 B... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Cat. HV, Morris’ method, Crystall clear sky, Moonlight]
2013 Apr. 21.81 UT: m1=7.2 CCD + V filter, Dia.=6.1′, DC=6, Tail= 0.42 deg. in PA: 345 deg ... 3.6-cm A f/3... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Cat. HV – 6 comp. stars with B-V=(0.52-0.69) on the same frame. Processing in DeepSkyStacker-median filter using 21x2s frames, 12dark, 12flat, 15bias. Photometry in IRIS on selected green channel. Crystall clear sky, Moonlight]
2013 Apr. 21.14 UT: m1=5.9, Dia.=4′, DC=6, Tail= 30′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Apr. 21.13 UT: m1=5.6, Dia.=4′, DC=5, Tail= 20′... Naked Eye... Carlos Labordena (Castellón, España)
2013 Apr. 20.91 UT: m1=7.1, Dia.=4′, DC=6/, Tail= 0.8 deg. in PA: 345 deg ... 18×50 B... Timo Karhula (Virsbo, Sweden) [73% gibbous moon. Astronomical twilight]
2013 Apr. 20.89 UT: m1=7.3, Dia.=~5′, DC=2... 15×80 B... Alex Scholten (Eerbeek, Netherlands) [altitude 21.0 degrees, fair conditions due to bright moonlight. tail of about 0.4 degrees in PA 345 degrees]
2013 Apr. 20.11 UT: m1=6.9, Dia.=5′, DC=6, Tail= 0.5º en AP: 350º... 10×50 B... Juan José González (Puerto de Aralla, alt. 1530 m, León, España) [En 20 -cm SCT (77x): cola en abanico entre 330º y 100º]
2013 Apr. 19.10 UT: m1=6.0, Dia=3’, DC=3... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 17.80 UT: m1=6.0, Dia.=2.5′, DC=5... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 17.80 UT: m1=6.9 CCD + V filter, Dia.=5.1′, DC=6... 3.6-cm A f/3... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Magnitude corrected for atmospheric extinction with ICQ “a” table. Cat. HV with 4 comp. stars with B-V in the range (0.50-0.69) on the same frame. Processing in DeepSkyStacker-median filter using 10x2s frames, 12dark, 12flat, 15bias. Photometry in IRIS on selected green channel. Moonlight (+12 C), comet alt. 19 deg]
2013 Apr. 16.83 UT: m1=6.4, Dia.=4′, DC=6... 20×60 B... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Cat. HV, magnitude corrected for extinction with ICQ “average” table. Comet alt. 16.7 deg]
2013 Apr. 16.81 UT: m1=6.7 CCD + V filter, Dia.=5.3′, DC=6... 3.9-cm A f/3... Mieczyslaw Leszek Paradowski (Lublin, Poland)[Magnitude corrected for atmospheric extinction with ICQ “a” table. Cat. HV with comp. stars HIP 1329 (7.43mag B-V=0.27) and HIP 2760 (7.37mag B-V=0.60) on the same frame. Processing in DeepSkyStacker-median filter using 10x2s frames, 12dark, 13flat, 27bias. Photometry in IRIS on selected green channel. Clear sky (+10 C), comet alt. 18 deg]
2013 Apr. 16.14 UT: m1=6.3 CCD, Dia=1.8’, DC=7... 25-cm L +CCD +Rc filter... Toni Scarmato (Calabria, Italy)
2013 Apr. 15.80 UT: m1=5.9, Dia.=3′, DC=5... 25×100 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 15.78 UT: m1=6.0, Dia.=4’, DC=3... 20×80 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 15.10 UT: m1=6.3, Dia.=~5′ DC=5... 10x50B... Alex Scholten (Eerbeek, Netherlands) [altitude 26.0 degrees, good conditions, tail of about 0.6 degrees in PA 340-0 degrees]
2013 Apr. 14.82 UT: m1=–, Dia.=4, DC=6, Tail=0.3 deg. in PA:18 deg ... 16×70 B... Uwe Pilz (Leipzig, Germany)
2013 Apr. 14.81 UT: m1=6.1... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 Apr. 14.78 UT: m1=6.0, Dia.=3’, DC=2... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 13.79 UT: m1=6.3, Dia.=3.0’, DC=7... 8×56 B... Sandor Szabo (Hungary)
2013 Apr. 12.83 UT: m1=6.1, Dia.=–, DC=7, Tail= 0.6 deg.... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 Apr. 12.46 UT: m1=6.0, Dia.=4´, DC=6... 15-cm SCT (37x)... Salvador Aguirre (Hermosillo, Sonora, Mexico) [Tail: visible]
2013 Apr. 11.86 UT: m1=5.8, Dia.=5′, DC=6, Tail= 0.8º in PA: 0º... 10×50 B... Juan José González (Dosango, alt. 590 m, Asturias, España) [En 25x100B: cola en abanico entre 340º y 40º. Baja altura sobre el horizonte: 10º. Ubicación rural, cielo claro]
2013 Apr. 10.79 UT: m1=5.7, Dia.=5’, DC=4... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 09.79 UT: m1=5.7, Dia.=4’, DC=3... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 07.85 UT: m1=5.6, Dia.=~3′, DC=6... 10×50 B... Alex Scholten (Eerbeek, Netherlands) [altitude 13.0 degrees, magnitude-estimate extinction-corrected with ICQ-‘average’-table. tail of about 1.1 degrees in PA 0-25 degrees]
2013 Apr. 07.79 UT: m1=5.2, Dia.=6′, DC=7, Tail= 0.4 deg in PA: 0 deg ... 7-cm R (10x)... Seiichi Yoshida (Ibaraki, Japan)
2013 Apr. 07.78 UT: m1=5.7 CCD, Dia.=5.3′... 3.9-cm A f/3 + CCD and V filter... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Magnitude corrected for atmospheric extinction with ICQ “winter” table. Cat. HV with comp. star HIP 4205 (7.19 mag B-V=0.62) on the same frame. Processing in DeepSkyStacker-median filter using 10x2sec. frames, 12dark, 13flat, 27bias. Photometry in IRIS on selected green channel. Clear sky (-1 C), comet alt. 14.8 deg]
2013 Apr. 07.17 UT: m1=4.4, Dia.=4′, DC=8, Tail= 30′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Apr. 07.16 UT: m1=4.1, Dia.=4′, DC=7, Tail= 20′... Naked Eye... Carlos Labordena (Castellón, España)
2013 Apr. 07.04 UT: m1=3.8, DC=7... 10×50 B... Jean-François Viens (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2013 Apr. 06.83 UT: m1=5.5, Dia.=~3′, DC=6... 10×50 B... Alex Scholten (Eerbeek, Netherlands) [altitude 14.0 degrees, fair conditions, magnitude-estimate extinction-corrected with ICQ-‘summer’-table. tail of about 0.6 degrees in PA 355-35 degrees]
2013 Apr. 06.78 UT: m1=5.6, Dia.=3’, DC=2... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Apr. 02.84 UT: m1=5.0, Dia.=~5′, DC=7... 10x50B... Alex Scholten (Eerbeek, Netherlands) [altitude 9.7 degrees, poor conditions, magnitude-estimate extinction-corrected with ICQ-‘average’-table]
2013 Apr. 02.816 UT: m1=4.6*, Dia.=3′, DC=6/, Tail= 1.3 deg. in PA: 0 deg ... 10×56 B... Peter Bus (Groningen, The Netherlands) [Fan-shaped tail spanned about PA 50-0°. Comet altitude: 14.2° Using winter table for extinction correction. Observation at the end of the Nautical Twilight]
2013 Apr. 02.78 UT: m1=4.4, Dia.=4′, DC=5... 10×50 B... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Apr. 01.83 UT: m1=4.7, Dia.=~5′, DC=7... 10×50 B... Alex Scholten (Eerbeek, Netherlands) [altitude 10.8 degrees, poor conditions, magnitude-estimate extinction-corrected with ICQ-‘summer’-table. tail of about 1.1 degrees in PA 5-30 degrees]
2013 Apr. 01.83 UT: m1=4.5, Dia.=2′, DC=7/, Tail= 1.3° in PA: 5°... 18x50B... Timo Karhula (Virsbo, Sweden) [In the same field of view as M31. Tail spanned to about PA 40°. Comet altitude: 13.5°. Visible with naked eye. End of astronomical twilight]
2013 Apr. 01.82 UT: m1=3.5, Dia.=6′, d6, Tail= 1 deg. in PA: 20 deg.... 7×50 B... Uwe Pilz (Leipzig, Germany)
2013 Apr. 01.816 UT: m1=4.5*, Dia.=3′, DC=7, Tail= 1.5 deg. in PA: 5 deg.... 10×56 B... Peter Bus (Groningen, The Netherlands)
2013 Mar. 31.01 UT: m1=3.5, DC=7, Tail= 90′ in PA: 12 deg ... 10×50 B & 20×100 B... Jean-François Viens (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2013 Mar. 30.81 UT: m1=4.4, Dia.=3.5′, DC=7, Tail= 1.3º in PA: 10 deg ... 10×50 B... Juan José González (Granja de Moreruela, alt. 705 m, Zamora, España) [En 25x100B: cola en abanico entre 0º y 50º. Baja altura sobre el horizonte: 12º, elongación solar: 31º. Crepúsculo náutico. Ubicación rural, cielo claro]
2013 Mar. 30.78 UT: m1=4.0, Dia=4’, DC=7, 7x50B, Toni Scarmato (Calabria, Italy)
2013 Mar. 30.05 UT: m1=4.0, Dia.=3′, DC=7, Tail= 1.0 deg in PA: 020 deg ... 15×70 B... Phillip J. Creed (Wilmot, OH, USA)
2013 Mar. 27.82 UT: m1=4.2, Dia.=~5′, DC=7... 10x50B... Alex Scholtenn (Eerbeek, Netherlands) [altitude 9.8 degrees, poor conditions (cirrus, twilight, moonlight), magnitude-estimate extinction-corrected with ICQ-‘average’-table. tail about 0.8 degrees in PA 15 degrees]
2013 Mar. 27.803 UT: m1=3.7*, Dia.=3′, DC=7, Tail=>1.5 deg. in PA: 15°... 10×56 B... Peter Bus (Groningen, The Netherlands) [All observations in Moonlight and at the end of the Nautical Twilight]
2013 Mar. 26.803 UT: m1=3.5*, Dia.=3′, DC=7/, Tail= 1.5 deg. in PA: 20°... 10×56 B... Peter Bus (Groningen, The Netherlands) [All observations in Moonlight and at the end of the Nautical Twilight]
2013 Mar. 26.17 UT: m1=4.2, Dia.=–, DC=7... 10x50B... Alex Scholten (Eerbeek, Netherlands) [altitude 7.4 degrees, poor conditions, magnitude-estimate extinction-corrected with ICQ-‘average’-table. tail about 0.8 degrees in PA 20 degrees]
2013 Mar. 25.10 UT: m1=3.5, DC=6... 10×50 B... Carl Hergenrother (Tanque Verde, AZ, USA)
2013 Mar. 24.81 UT: m1=2.8*... Naked Eye... Timo Karhula (Virsbo, Sweden) [DC=8, Tail= 1.1° in PA: 25° in 18x50B. Corrected for atmospheric extinction with ICQ winter table. Comet altitude 9°. Tail spanning from 25° – 65°. Moonlight]
2013 Mar. 24.78 UT: m1=2.8, Dia.=6′, DC=S7, Tail= 0.4 deg. in PA: 14 deg ... 16×70 B... Uwe Pilz (Leipzig, Germany)
2013 Mar. 24.77 UT: m1=3.4*, Dia.=4′, DC=8, Tail= 0.5 deg. in PA: 40 deg ... Naked Eye... Piotr Guzik (Somniki, Poland) [The comet was slightly brighter than eta Psc and significantly fainter than alpha And. Still relatively easy to see with naked eye. The transparency of the sky was not as good as on previous occasions. In 10x50B: m1=3.5*, tail: 1.2 degrees in p.a. 40 deg. The m1 has been corrected for extinction using “Average” table values]
2013 Mar. 24.11 UT: m1=3.3, DC=7... 10×50 B... Carl Hergenrother (Tanque Verde, AZ, USA)
2013 Mar. 23.99 UT: m1=4.0 CCD... Dia.=94″... CCD images unfiltered... Clermont Vallière (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada) [comparison star Tycho 1741-11995 mag.=8.021]
2013 Mar. 23.76 UT: m1=1.8, Dia.=&8′, DC=S7, Tail= 3.0 deg in PA: 50 deg ... 7×35 B... Mieczyslaw Leszek Paradowski (Wawolnica, Poland) [Magnitude corrected for atmospheric extinction with ICQ “winter” table. Cat. HV, Alpha Ari, Alpha And... comet alt. 8.3 deg. Comet and Alpha And in FOV -comet slightly brighter in Morris’ method. Crystall clear sky (-10 C)]
2013 Mar. 23.76 UT: m1=3.1*, Dia.=4′, DC=8, Tail= 0.5 deg. in PA: 40 deg ... Naked Eye... Piotr Guzik (Somniki, Poland) [The comet was clearly brighter than eta Psc and significantly fainter than alpha And. Clearly seen with naked eye though a bit harder than six days ago. In 10x50B: m1=3.3*, broad dust tail spanning from p.a. 20 deg. to 80 deg. I could trace it to about 1.8 degrees in p.a. 40 deg. The m1 has been corrected for extinction using “Winter” table values]
2013 Mar. 23.74 UT: m1=2.7*, Dia.=5’, DC=7... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Mar. 23.10 UT: m1=3.1, DC=7... 10×50 B... Carl Hergenrother (Tanque Verde, AZ, USA)
2013 Mar. 22.74 UT: m1=2, Dia.=3′, DC8... 12×50 B... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 22.74 UT: m1=2.5*, Dia.=5’, DC=7... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Mar. 21.795 UT: m1=2.8*, Dia.=3′, DC=8, Dust Tail= 1.1 deg. in PA: 40°... 10×56 B... Peter Bus (Groningen, The Netherlands) [All observations in Moonlight and at the end of the Nautical Twilight]
2013 Mar. 21.75 UT: m1=1.5, Dia.=3′, DC8, Tail= 1°... Naked Eye... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 20.82 UT: m1=2.7*, Dia.=3′, DC=8/, Tail= 0.5º in PA: 35º... Naked Eye... Juan José González (La Unión de Campos, alt. 780 m, Valladolid, España)
2013 Mar. 20.81 UT: m1=3.1*, Dia.=2.5′, DC=8, Tail= 0.7º in PA: 35º: 10x50B... Juan Jose Gonzalez (La Union de Campos, alt. 780 m, Valladolid, España) [En 25x100B: cola en abanico entre 30º y 80º, longitud 1.7º en PA 35º. Baja altura sobre el horizonte: 10º... elongación solar: 21º. Fin del crepúsculo náutico. Alguna interferencia de la luz lunar. Magnitud corregida de extinción atmosférica mediante la tabla de invierno del ICQ. Ubicación rural, cielo claro]
2013 Mar. 20.78 UT: m1=2.9 ... 8×40 B... Jan Horsky (Rep. Checa)
2013 Mar. 20.77 UT: m1=2.3, Dia.=5′, DC=7/, Tail= 0.5 deg in PA: 45 deg ... Naked Eye... Jakub Cerny (Rep. Checa)
2013 Mar. 20.77 UT: m1=2.6, Dia.=8′, DC=7, Tail= 2.0 deg in PA: 45 deg ... 8×40 B... Jakub Cerny (Rep. Checa)
2013 Mar. 20.76 UT: m1=2.6*, Dia.=4′, DC=8, Tail= 1 deg. in PA: 50 deg ... Naked Eye... Piotr Guzik (Skawinki, Poland) [Comet easily seen with naked eye. In 10x50B the dust tail was very broad, spanning from p.a. 30 deg. to 100 deg. and significantly curved to the left. I could trace it to about 2.5 degrees. Faint, thin, straight ion (?) tail was also visible in p.a. 30 deg., approx. 1.5 degrees long. The sky was transparent and pretty dark – in 10x50B stars up to magn. 7.5 were seen in comet vicinity. The m1 has been corrected for extinction using “Winter” table values]
2013 Mar. 19.76 UT: m1=1.8, Dia.=5’, DC=7... Naked Eye... Sandor Szabo (Hungary)
2013 Mar. 20.74 UT: m1=1.5, Dia.=3′, DC7, Tail= 2°... 12×50 B... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 19.74 UT: m1=1.0, Dia.=3′, DC7, Tail= 2°... 12×50 B... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 19.74 UT: m1=1.6, Dia=7’, DC=8... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Mar. 18.00 UT: m1=2.6, Dia.=3′, DC=9, Tail= 0.5 deg in PA: 50 deg ... 15×70 B... John Bortle (Brooks Obs., New York, USA)
2013 Mar. 17.99 UT: m1=2.0 CCD, Dia.=2.4’... CCD images unfiltered... Clermont Vallière (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada) [comparison star Tycho 609-1714 mag.=9.617]
2013 Mar. 17.81 UT: m1=2.2, Dia.=3′, DC=8/, Tail= 0.5º in PA: 55º... Naked Eye... Juan José González (Camposagrado, alt. 1130 m, León, España) [En 25x100B: cola en abanico entre 45º y 70º, longitud 1.5º en AP 55º. Baja altura sobre el horizonte: 8º... elongación solar: 18º. Fin del crepúsculo náutico. Magnitud corregida de extinción atmosférica mediante la tabla de invierno del ICQ. Cielo claro de montaña]
2013 Mar. 17.75 UT: m1=1.7, Dia.=–, DC=8, Tail= 1.5° PA: 50°... 11×70 B... Maciej Macidym (Chlebna, Poland) [Corrected for atmospheric extinction. Very good conditions. Visible in binoculars two stars around comet, a brightness of less than 6 magnitude. Ref.TK. And Alpha, Gamma Ari]
2013 Mar. 17.74 UT: m1=0.5, Dia.=2′, DC8, Tail= 1.5°... 12×50 B... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 17.74 UT: m1=1.4 CCD + V filter, Dia.=5.3′... 3.9-cm f/3 lens... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Magnitude corrected for atmospheric extinction with ICQ “winter” table... Cat. HV with comp. star 64 Psc on the same frame. Processing and photometry in IRIS using 11dark, 13flat, 10bias. Crystall clear sky (-5 C), comet alt. 7.7 deg]
2013 Mar. 17.74 UT: m1=1.8, Dia.=3′, DC=8, Tail=1 deg. in PA: 55 deg ... Naked Eye... Piotr Guzik (Krosno, Poland) [In 10x50B: very broad dust tail, spanning from PA 45 deg. to ~110 deg, at least 2.5 deg long in PA 55 deg. Northern edge of the tail gently curved and sharp, southern much more diffuse and shorter – about 0.5 deg. in PA 110 deg. Comet easily seen with naked eye for more than half an hour. The m1 has been corrected for extinction using “Winter” table values]
2013 Mar. 17.72 UT: m1=1.8:, Dia.=&5′, DC=7, Tail= 0.4 deg ... 7×50 B... Artyom Novichonok (Petrozavodsk, Russia) [Bright still. Visible with naked eye]
2013 Mar. 16.76 UT: m1=1.7, Dia.=10′, DC=8, Tail= 0.5° in PA: 60°... Naked Eye... Martin Lehky (Hradec Kralove, Czech Republic)
2013 Mar. 16.76 UT: m1=1.7, Dia.=5′, DC=8/, Tail= 0.5 deg in PA: 60 deg ... Naked Eye.... Jakub Cerny (Rep. Checa)
2013 Mar. 16.74 UT: m1=2.3, Dia.=10′, DC=8, Tail= 0.5° in PA: 65°... 10×70 B... Maciej Macidym (Chlebna, Poland) [Magnitude estimate corrected for atmospheric extinction with ICQ “Average” table]
2013 Mar. 16.73 UT: m1=1.7*, Dia.=3′, DC=8, Tail= 0.5 deg. in PA: 65 deg.... Naked Eye... Piotr Guzik (Krosno, Poland) [In 10x50B: broad dust tail ~2 deg long. Comet easily seen with naked eye, much brighter than nearby gamma Peg (2.8 mag). The m1 has been corrected for extinction using “Average” table values]
2013 Mar. 16.10 UT: m1=1.3, DC=6... Naked Eye... Carl Hergenrother (U. of Arizona campus, AZ, USA)
2013 Mar. 15.80 UT: m1=2.0, Dia.=2′, DC=9, Tail= 0.5 deg. in PA: 55°... Naked Eye... Nicolas Biver (Pico Veleta, España) [extinction correction]
2013 Mar. 15.80 UT: m1=0.9, Dia.=4′, DC=8, Tail= 40′... Naked Eye... Carlos Labordena (Castellón, España)
2013 Mar. 15.79 UT: m1=2.3, Dia.=2′, DC=8, Tail= 0.5 deg. in PA: 60°... 7×50 B... Nicolas Biver (Pico Veleta, España) [extinction correction, 2.5 deg tail seen later on)
2013 Mar. 15.79 UT: m1=1.2, Dia.=4′, DC=9, Tail= 50′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Mar. 15.79 UT: m1=2.3, Dia.=2′, DC=8, Tail= 0.5 deg. in PA: 60°... 7×50 B... Nicolas Biver (Pico Veleta, España) [extinction correction, 2.5 deg tail seen later on)
2013 Mar. 15.75 UT: m1=0.0, Dia.=2′, DC8, Tail= 1°... 12×50 B... Giuseppe Pappa (Sicily, Italy)
2013 Mar. 15.09 UT: m1=1.4, DC=6, Tail= 0.2 deg. in PA: 90 deg ... Naked Eye... Carl Hergenrother (Tanque Verde, AZ, USA)
2013 Mar. 14.81 UT: m1=1.8*, Dia.=2.5′, DC=7/, Tail= 0.3º en AP: 70º... 10×50 B... Juan José González (Morriondo, alt. 1040 m, León, España) [Muy baja altura sobre el horizonte: 6º, elongación solar: 16º. Fin del crepúsculo náutico. Magnitud corregida de extinción atmosférica mediante la tabla de invierno del ICQ. Cielo claro de montaña]
2013 Mar. 14.81 UT: m1=1.9, Dia.=3′, DC=8, Tail= 0.5 deg ... Naked Eye... Nicolas Biver (Pico Veleta, España) [extinction correction]
2013 Mar. 14.81 UT: m1=2.2, Dia.=2′, DC=8, Tail= 2.0 deg. in PA: 75°... 7×50 B... Nicolas Biver (Pico Veleta, España) [extinction correction]
2013 Mar. 14.80 UT: m1=0.8, Dia.=4′, DC=8, Tail= 30′... Naked Eye... Carlos Labordena (Castellón, España)
2013 Mar. 14.79 UT: m1=1.1, Dia.=4′, DC=9, Tail= 40′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Mar. 14.79 UT: m1=0.9, Dia.=-, DC=8, Tail= 0.4º... 10×50 B... José J. Chambó (Vallés, Valencia, España) [Cat=Tycho2, Met=Morris, Nautical twilight, comet altitude=5º, atmospheric extinction applied]
2013 Mar. 14.79 UT: m1=2.1, Dia.=1′, DC=8, Tail= 1.0 deg. in PA: 7° .. 7×50 B... Nicolas Biver (Pico Veleta, España) [extinction correction]
2013 Mar. 14.78 UT: m1=1.2, Dia.=–, DC=8... Naked Eye... Alex Scholten (Eerbeek, Netherlands) [altitude 4.5 degrees, good conditions, magnitude-estimate extinction-corrected with ICQ-‘winter’-table. with naked eye tail of about 0.2 degrees in PA 65 degrees in 15x80B about 0.4 degrees]
2013 Mar. 14.76 UT: m1=1.6:, Dia.=5′, DC=7/, Tail= 1.5 deg in PA: 60 deg ... 25×100 B... Jakub Cerny (Rep. Checa)
2013 Mar. 14.50 UT: m1=1.8:, DC=8, Tail= 0.5 deg. in PA: 75 deg ... Naked Eye... Man-To Hui (Mt. Jizu, Yunan, China) [alt. 7.8 deg.)
2013 Mar. 14.09 UT: m1=1.4, DC=8, Tail= 0.2 deg. in PA: 90 deg ... Naked Eye... Carl Hergenrother (Tanque Verde, AZ, USA)
2013 Mar. 13.81 UT: m1=0.9, Dia.=4′, DC=8, Tail= 40′... Naked Eye... Carlos Labordena (Castellón, España)
2013 Mar. 13.80 UT: m1=1.2, Dia.=4′, DC=9, Tail= 40′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Mar. 13.77 UT: m1=1.2, Dia.=–, DC=8... Naked Eye... Alex Scholten (Eerbeek, Netherlands) [altitude 4.4 degrees, good conditions, magnitude-estimate extinction-corrected with ICQ-‘winter’-table. in 15x80B tail of about 0.3 degrees in PA 65 degrees]
2013 Mar. 13.76 UT: m1=1.5... Naked Eye... Uwe Pilz (Leipzig, Germany) [with 7×50 B: DC:7, Tail:0.25° in PA:58°]
2013 Mar. 13.68 UT: m1=1.7:, Dia.=&5′, DC=7/... 7×50 B... Artyom Novichonok (Northern Caucasus, near Nizhniy Arkhyz, Russia)
2013 Mar. 13.67 UT: m1=1.5, Dia.=6′, DC=7... 20,3-cm Catadioptric... Grishin Kirill
2013 Mar. 11.79 UT: m1=1.0, Dia.=5′, DC=8, Tail= 40′... 11×80 B... Carlos Labordena (Castellón, España)
2013 Mar. 11.74 UT: m1=-1, Dia.=1′, DC9, Tail= 30′... Naked Eye... Giuseppe Pappa (Sicily, Italy) [twilight, alt. 3°]
2013 Mar. 11.29 UT: m1=1.6, Dia.=–, DC=9, Tail= 20′ in PA: 75 deg ... 15×70 B... Gabor Santa (Hármashatár-hegy, Budapest, Hungary) [elev. 500 m above sea level. Haven’t seen to the naked eye. Narrow fan-shaped tail]
2013 Mar. 11.10 UT: m1=2.0, Dia.=6′, DC=8, Tail= visible ... 10×50 B... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2013 Mar. 10.96 UT: m1=1.5, Dia.=3′, DC=8/... 15x70B... Mariano Ribas (Buenos Aires, Argentina) [Cometa observado a 5º sobre el horizonte Oeste, entre edificios, con fuerte interferencia del cielo crepuscular muy claro. Aún asi, se llegaba a apreciar un rastro de la cola, y una coma muy brillante y concentrada. Extinción atm. aplicada]
2013 Mar. 10.93 UT: m1=-0.1, Dia.=–, DC=9... Naked Eye... Marco Goiato (Araçatuba, Brasil) [civil twilight, sun altitude: -8º, comet altitude: 5º, atmospheric extinction applied, clouds ]
2013 Mar. 10.93 UT: m1=0.2, Dia.=5′, DC=8, Tail= 0.5 degree in PA: 80°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [civil twilight, sun altitude: -8, comet altitude: 5º, yellow dust tail, atmospheric extinction applied, clouds]
2013 Mar. 10.77 UT: m1=1.4*, Dia.=2.5′, DC=8, Tail= 0.3º deg. in PA: 90º... 10×50 B... Juan José González (Far de Sant Sebastia – Llanfranc, alt. 170 m, Girona, España) [No visible a simple vista. Muy baja altura sobre el horizonte: 3º, elongación solar: 15º. El cometa pudo observarse en 10x50B durante 15 minutos en el crepúsculo náutico, mostrando una corta cola de polvo. Magnitud corregida de extinción atmosférica con la tabla “media” del ICQ. Localidad cercana al nivel del mar. Cielo transparente hasta el horizonte]
2013 Mar. 10.75 UT: m1=0.5*, Dia.=7’, DC=9... Naked Eye... Toni Scarmato (Calabria, Italy)
2013 Mar. 10.74 UT: m1=-1, Dia.=1′, DC=9... 12×50 B... Giuseppe Pappa (Sicily, Italy) [twilight, alt. 2°]
2013 Mar. 10.73 UT: m1=-1.0, Dia.=5′, DC=9, Tail= 1 degree in PA: 140°... 7×50 B... Toni Scarmato (Calabria, Italy)
2013 Mar. 10.38 UT: m1=-0.3, Dia.=2', DC=8... 7×50 B... Chris Wyatt (Walcha, NSW, Australia) [Tail visible to 15’ in length to the ESE. Observation made it twilight, cloud in vicinity but not interfering, altitude 1.3 degrees. Visible naked eye, central condensation appeared white in colour through 7×50 B’s. Extinction corrections made using ICQ ‘a’ table (Corrections likely to be too large) -> a digital image taken earlier by me was examined by Terry Lovejoy and suggests a magnitude closer to 1.5. Comparison stars: Tycho-2. Method=M. Cat=TK]
2013 Mar. 10.21 UT: m1=-1.0:, Dia.=2′, DC=8, Tail= 0.25 deg. in PA: 100°... 7×35 B... Mike Linnolt (Ocean View, Hawaii, USA) [Altitude 5 degrees, magnitude uncertain, comp stars were Canopus and Alpheratz, extinction estimated approximately]
2013 Mar. 08.967 UT: m1=1.2:, Dia.=4´, DC=8/... 20x80 B... Luis Mansilla (La Carolina, Sta. Fe, Argentina) [breve observación entre nubosidad en aumento, extinción aplicada, coma muy condensada con gran condensación central con cola bien visible a pesar de las nubes que lo cruzaban]
2013 Mar. 08.96 UT: m1:1.2, Dia=4′, DC=8/9, Tail= 15′... 20×80 B... Julio Nardon (Alvear, Argentina) [cometa brillante, con coma cuasi estelar. Observación dificultosa por condiciones meteorológica malas con creceiente nubosidad hacia el Oeste]
2013 Mar. 08.94 TU: m1=1.6, Dia=–, DC=9, Tail= 1º... 15×70 B... Ester Letrica (Cdad. de Buenos Aires, Argentina) (cielo despejado, polución lumínica alta, cola color blanco amarillento algo mas oscura en la banda central)
2013 Mar. 07.96 UT: m1=1.6, Dia.=–, DC=9, Tail= 0,5º... 10×50 B... Ester Letrica (Cdad. de Buenos Aires, Argentina) (cielo con algo de nubosidad, polución lumínica alta)
2013 Mar. 07.94 UT: m1=0.1, Dia.=6′, DC=8, Tail= 1 degree in PA: 110°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [civil twilight, sun altitude: -11, comet altitude: 5º, yellow dust tail, atmospheric extinction applied, clouds]
2013 Mar. 07.94 UT: m1=-0.3, Dia.=–, DC=8/, Tail= 0.5 degrees in PA: 110°... Naked Eye... Marco Goiato (Araçatuba, Brasil) [ civil twilight, sun altitude: -11º, comet altitude: 5º, atmospheric extinction applied, clouds ]
2013 Mar. 07.388 UT: m1=1.6, Dia.=–, DC=7/... 7×50 B... Chris Wyatt (Walcha, NSW, Australia) [Tail to the SE, 1.8 degrees in length, twilight affected, 3.8 degrees altitude, extinction corrected using ICQ ‘a’ table. Observing site 1085m. Comparison stars checked using Tycho-2 data in Guide 9.0. Method=M. Cat=TK]
2013 Mar. 06.983 UT: m1=1.0, Dia.=5’, DC=8/, Tail= 1°... 20×50 B... Luis Mansilla (Rosario, Argentina) [polución lumínica moderada, extinción aplicada]
2013 Mar. 06.93 UT: m1=-0.2, Dia=–, DC=9... Naked Eye... Marco Goiato (Araçatuba, Brasil) [civil twilight, sun altitude: -7º, comet altitude: 8º, atmospheric extinction applied, clouds]
2013 Mar. 06.93 UT: m1=0.2, Dia.=4′, DC=8, Tail= 0.3 degrees in PA: 120°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [civil twilight, sun altitude: -7º, comet altitude: 8º, yellow dust tail, atmospheric extinction applied, clouds]
2013 Mar. 06.41 UT: m1=1.7, DC=9... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia) [Brightness compared with Beta Ceti (taken as m=2). Comparison made between remembered appearance of comet with star when later reached same elevation. “Correction” for difference in background sky brightness necessarily subjective]
2013 Mar. 06.395 UT: m1=1.8, Dia.=–, DC=8... 7×50 B... Chris Wyatt (Walcha, NSW, Australia) [Tail to SE, 1.5 degrees in length. Twilight affected, Alt= 1.9 degrees, extinction corrected using ICQ ‘w’ table. The central condensation appears white through 7×50 B’s but deep yellow/reddish in colour using 11×70 B’s. Observing site 910m. Comparison stars checked using Tycho-2 data in Guide 9.0. Method=M. Cat=TK]
2013 Mar. 06.003 UT: m1=2.0, Dia.=5’, DC=8, Tail= 2°... 15×70 B... Rodolfo Ferraiuolo (San Rafael, Mza., Argentina) [Cola visible a simple vista. Altura:6°. Tono amarillento-crema. Con 15×70 segunda cola, ancha y tenue. Imagen de abanico]
2013 Mar. 05.979 UT: m1=1.9, Dia.=5, DC=8... 20×50 B... Luis Mansilla (Rosario, Argentina) [corrección por extinción]
2013 Mar. 05.969 UT: m1=2.0... Naked Eye... Hebert Pistón Rodríguez (La Paz, Canelones, Uruguay)
2013 Mar. 05.958 UT: m1=2.0, Tail= 1,5°... 8×30 B... Hebert Pistón Rodríguez (La Paz, Canelones, Uruguay)
2013 Mar. 05.41 UT: m1=1.8, DC=9... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia)
2013 Mar. 05.395 UT: m1=1.1, Dia.=–, DC=7... 7×50 B... Chris Wyatt (Walcha, NSW, Australia) [Tail visible to around 1 degree in length to the SE. Slightly curved to the South, coma stellar in appearance with slight haze surrounding a white pseudo nucleus. Tail was tinged yellow in colour near the coma but faded to a more orange colour near the tip. Extinction corrected using ICQ ‘a’ table. Alt = 3.0 deg, twilight affected. Observing site 963m. Comparison stars checked using Tycho-2 data in Guide 9.0. Method=M. Cat=TK]
2013 Mar. 05.007 UT: m1=2.2, Dia.=5’, DC=8/, Tail= 2.3°... 15×70 B... Rodolfo Ferraiuolo (San Rafael, Mza., Argentina) [Cola visible a simple vista. Altura:7°... corrección ext. at y crepuscular. Tono amarillento-crema. Con 15×70 segunda cola, ancha y tenue. Imagen de abanico]
2013 Mar. 04.987 UT: m1=1.7, Tail= 2 degrees... Naked Eye... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 04.986 UT: m1=2.0, Dia.=5, DC=8, Tail= 1.5 degrees... 20×50 B... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 04.41 UT: m1=2.0, DC=9, Tail= 1.5 degrees... Naked eye... David A. J. Seargent (Cowra, NSW, Australia) [Approximately 3 degrees of tail visible in 15x80B]
2013 Mar. 04.40 UT: m1=2.0, Dia.=5.5′, DC=7/... Con Stoitsis (Caulfield, Melbourne, Australia) [The comet was visible with a very short tail to the naked eye. The coma is very strong and starlike. Tail 1.5 degrees PA 160. Dust trail (type 3) 0.5 degrees in length, PA 190°, only visible in 20-cm]
2013 Mar. 03.991 UT: m1=1.8, Tail= 2 degrees... Naked Eye... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 03.988 UT: m1=2.1, Dia.=5, DC=8, Tail= 1.5 degrees... 20×50 B... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 03.94 UT: m1=1.4, Dia.=5′, DC=7/, Tail= 0.5 degrees in PA: 140°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [nautical twilight, sun altitude: -12º, comet altitude: 6º, yellow dust tail, atmospheric extinction applied]
2013 Mar. 03.41 UT: m1=2.0, DC=9... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia) [Head starlike with NE but tail visible to 0.5 – 1 degree in twilight. In 25×100 binocular telescope coma alsmost starlike with spectacular dist tail at least 2 degrees against bright twilight background sky]
2013 Mar. 02.992 UT: m1=2.2, Dia.=4, DC=8, Tail= 1.3 degrees... 20×50 B... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 02.97 UT: m1=2.4... Naked Eye... Mariano Ribas (Buenos Aires, Argentina) [El cometa es más fácil de observar a simple vista que hace un par de días. Con binoculares 10×50 se observa una cola de al menos 1º de largo. Cielo despejado y transparente en el momento de la observación.]
2013 Mar. 02.94 UT: m1=1.8, Dia=4′, DC=7/... Tail= 0.3 degrees in PA: 150°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [nautical twilight, sun altitude: -13º, comet altitude: 4º, yellow dust tail, atmospheric extinction applied]
2013 Mar. 02.40 UT: m1=2.0, Dia=5′, DC=7/... Con Stoitsis (Caulfield, Victoria, Australia) [Approx 5 degrees above the SW horizon. The comet seemed slightly brighter than the previous night. To the naked eye, the comet was starlike in appearance and I could detected a short tail with direct vision. In my 11x70mm binoculars the tail was approx 1.5 degrees in length at 160°PA]
2013 Mar. 01.993 UT: m1=2.3, Dia.=4, DC=8, Tail= 1 degrees... 20×50 B... Luis Mansilla (Mina Clavero, Argentina) [corrección por extinción]
2013 Mar. 01.95 UT: m1=2.1, Dia.=4′, DC=7... Tail= 0.25 degrees in PA: 150°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [nautical twilight, sun altitude: -13º, comet altitude: 3º, yellow dust tail, atmospheric extinction applied]
2013 Mar. 01.40 UT: m1=2.4, DC=7/, Tail= over 1 deg in length, PA: 160°... 11×70 B... Con Stoitsis (Elwood beach, Victoria, Australia) [The comet was visible to the naked eye as a starlike object with a very short tail, which appeared longer with averted vision]
2013 Feb. 28.99 UT: m1=2.7, Dia.=3′, DC=8... 20×50 B... Luis Mansilla (La Carolina zona rural, Argentina) [altura:4.5°, 15x70B cola de polvo de 1.5 grados en AP:165° a 140°. orrección por extinción]
2013 Feb. 28.99 UT: m1=2.8, Dia.=2′, DC=8/9... Tail= 0,6º... 10x50B...  Mariano Ribas (Buenos Aires, Argentina) [Cometa ya visible a ojo desnudo en Buenos Aires, a pesar de su baja altura, el brillo del cielo crespuscular y la contaminación luminosa. Notable abrillantamiento en los últimos dos días. Observado a 8º sobre el horizonte. Corrección por extinción atmosférica]
2013 Feb. 28.41 UT: m1=2.6, Dia.=~5′, DC=7... Naked Eye... Michael Mattiazzo (Castlemaine, Victoria, Australia) [End of nautical twilight. At 6 degrees altitude the comet, and small portion of tail, was clearly visible with the unaided eye, appearing marginally fainter than comparison stars Alpha Gruis (1.8) and Alpha Pavonis (1.9). In 25x100mm binoculars, the dust tail measured 1.5 degrees in PA165, with the much fainter and shorter type 3 dust trail in PA 205. The ion tail was not visible visually but is at least 2 degrees long in PA155 on a 3 minute exposusure using a canon 60Da camera and 300mm lens]
2013 Feb. 27.986 UT: m1=3.0, Dia.=3′, DC=7/, Tail= 0.7° in PA: 155°... 20×50 B... Luis Mansilla (Rosario, Argentina) [altura:6°]
2013 Feb. 27.007 UT: m1=~4.0, Dia.=–, DC=8/9, Tail= 35′ PA: 135°... 15×70 B... Rodolfo Ferraiuolo (San Rafael, Mza., Argentina) [Altura: 6°, corrección ext. at., mediana interferencia lunar y crepuscular]
2013 Feb. 26.989 UT: m1=3.3, Dia.=3′, DC=8, Tail= 45′... 20×50 B... Luis Mansilla (Rosario, Argentina) [altura:5°, corrección por extinción, interferencia lunar fuerte y crepuscular]
2013 Feb. 26.98 UT: m1=3.6, Dia.=2′, DC=8/, Tail= 23'... 10x50B... Mariano Ribas (Buenos Aires, Argentina) [Cometa a 11º sobre el horizonte. Interferencia crepuscular. Coma extremadamente concentrada en su parte central. Color amarillento. La cola se ve más claramente que hace unos días contra el fondo de cielo crepuscular]
2013 Feb. 25.995 UT: m1=3.6, Dia.=3′, DC=8, Tail= 30′... 20×50 B... Luis Mansilla (Rosario, Argentina) [altura:4°, corrección por extinción, interferencia lunar fuerte y crepuscular]
2013 Feb. 24.992 UT: m1=3.9, Dia.=–, DC=8, Tail= 30′... 20×50 B... Luis Mansilla (Rosario, Argentina) [altura:5°, corrección por extinción, interferencia lunar fuerte y crepuscular. Cola en abanico]
2013 Feb. 24.98 UT: m1=4.0, Dia.=2′, DC=8/9... 10x50B... Mariano Ribas (Buenos Aires, Argentina) [Cometa a 10º sobre el horizonte. Interferencia lunar y crepuscular. La parte central de la coma luce extremadamente concentrada, con aspecto estelar. La cola  se insinúa claramente a pesar del fondo de cielo relativamente brillante]
2013 Feb. 24.32 UT: m1=~3.0, Dia.=~5′, DC=5, Tail=20′ in PA=173°... 15 x 70 B... John Drummond (Gisborne, New Zealand) [Comet PANSTARRS easy to see in dusk. Nice coma and medium tail. Comparison stars – Alpha, Gamma, Delta PSA (mags 1.2, 4.2, 4.5). Comet 4 degrees altitude in the SW. Clear, bright 12 day Moon, twilight sky]
2013 Feb. 21.959 UT: m1=4.5... 20×50 B... Luis Mansilla (Rosario, Argentina) [alt.: 3°, corregida por extinción, interferencia lunar y crepuscular]
2013 Feb. 20.44 UT: m1=4.8... 10×50 B... David A. J. Seargent (The Entrance, NSW, Australia) [Observed in bright moonlight but in clear region of sky]
2013 Feb. 20.396 UT: m1=4.7, Dia.=–, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Coma appears small and elongated to the South, bright stellar central condensation with fainter outer coma maybe 1 to 2 arc-minutes in diameter. Yellow in colour, low altitude (4.0 deg). Moonlight and twilight interference as well as thin smoke haze near the horizon, extinction correction applied. Method=M... Cat=TK]
2013 Feb. 19.85 UT: m1=4.2, Dia.=2.5′, DC=8... 10-cm f4 refl. (20x)... Andrew Pearce (Nedlands, W. Australia) Comet observed approx 4 deg above horizon in morning sky.  Lambda and Gamma Gruis used as comparison stars as per Reinder Bouma’s chart.  No atmospheric extinction correction applied, although the comet and comparison stars were within a couple of degrees altitude of each other. The comet is clearly brighter than Lambda Gruis (mag 4.6)  Short broad tail 25′ long in PA 205 deg clearly visible even in a bright sky background]
2013 Feb. 19.74 UT: m1=5.0... 10×50 B... David A. J. Seargent (The Entrance, NSW, Australia) [Humid sky. Estimate approximate only]
2013 Feb. 18.42 UT: m1=5.5... 4×40 B... David A. J. Seargent (The Entrance, NSW, Australia) [Observed in moonlight and some light pollution]
2013 Feb. 17.85 UT: m1=4.9, Dia.=2′, DC=8... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia) [Short tail 0.8 deg long in PA 205 deg clearly visible even in a bright sky background]
2013 Feb. 17.33 UT: m1=5.2*, Dia.=3′, DC=7, Tail= 0.15 deg in PA: 220°... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 9 deg, nautical twilight]
2013 Feb. 16.32 UT: m1=5.0, Dia.=4′, DC=7... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [altitude 8 deg, nautical twilight]
2013 Feb. 15.85 UT: m1=4.5, Dia.=2′, DC=7/... 10-cm f4 refl. (20x)... Andrew Pearce (Nedlands, W. Australia) [This comet has got quite bright over the last week or so. Short tail clearly visible even in a bright sky background]
2013 Feb. 15.75 UT: m1=5.0, Dia.=4.0′, DC 8/... 11×70 B... Con Stoitsis (Clonbinane, Victoria, Australia) [Broad tail 0.4 length PA 230°. Very condensed centre. Just visible to the naked eye with averted vision]
2013 Feb. 15.73 UT: m1=5.0... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 14.73 UT: m1=5.0... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia) [Appeared to naked eye as slightly nebulous and probably elongated ‘star”]
2013 Feb. 14.33 UT: m1=5.3, Dia.=–, DC=8... 7-cm R (28x)... Margarete J. Amorim (Florianopolis, Brazil) [altitude 12 deg, nautical twilight]
2013 Feb. 14.32 UT: m1=5.1*, Dia.=4′, DC=7, Tail= 0.4 deg in PA: 240°... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [altitude 10 deg, nautical twilight]
2013 Feb. 13.74 UT: m1=5.3... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 13.45 UT: m1=5.3, Dia.=8’, DC=7/8... 7×50 B... Chris Wyatt (Walcha, NSW, Australia) [Bright central condensation, tail to WSW and broadly fans out with Northern edge of tail longer than the opposite side. Visible with naked eye but clouds and thin haze prevented making estimates. Method=M. Cat=TK]
2013 Feb. 13.32 UT: m=5.5:, Dia.=4′, DC=7, Tail= 0.3 deg in PA: 230 deg ... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [altitude 10 deg, nautical twilight, clouds interference]
2013 Feb. 12.74 UT: m1=5.5... 6×35 B... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 11.85 UT: m1=5.7, Dia.=3′, DC=7... 10-cm refl. f/4 (20x)... Andrew Pearce (Nedlands, W. Australia) [Comet located close to a 7th mag star which made observation of the tail difficult)
2013 Feb. 11.75 UT: m1=5.2, Dia.=4.0′, DC=8/... 11×70 B... Con Stoitsis (Caulfield, Victoria, Australia) [Very condensed starlike coma. More diffused towards the edges. Broad tail 0.45 deg in length in PA 240°. Approx 10 degrees above the horizon, and the start of twilight, when observed]
2013 Feb. 11.32 UT: m1=5.5:, Dia.=4′, DC=7, Tail= 0.3 deg in PA: 250°... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [altitude 11 deg, nautical twilight, clouds interference]
2013 Feb. 10.84 UT: m1=5.7, Dia.=3.5′, DC=7... 10-cm f/4 refl. (20x)... Andrew Pearce (Nedlands, W. Australia) [Short broad tail clearly seen, 24′ long in PA 233 deg.]
2013 Feb. 10.74 UT: m1=5.5, Dia.=4.0′, DC=8... 11×70 B... Con Stoitsis (Caulfiield, Victoria, Australia) [Bright stellar central condensation (Starlike centre) Tail easily visible approx 20′ in length. At the time of observation the comet was approx 10 degs above SE horizon. Morning twilight interference. Not visible to the naked eye]
2013 Feb. 11.74 UT: m1=5.8... 6×35 B... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 11.72 UT: m1=—, Dia.=3′... DC=7, Tail= ~1 degree in PA: 235 ... 25×100 B... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 10.72 UT: m1=5.7... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia) [Through 25×100 binocular telescope, tail appeared of a more even intensity rather than the forked appearance earlier in month]
2013 Feb. 09.74 UT: m1=5.3, Dia.=stellar, DC=8/... Naked Eye... Chris Wyatt (Walcha, NSW, Australia) [Averted vision, coma appears stellar in periods of good seeing, tail not visible. Limiting magnitude = 6.0 + twilight affected, 1230m alt. Method= S. Cat= TK]
2013 Feb. 09.74 UT: m1=5.7, Dia.=4.5', DC=8... 7x50 B... Chris Wyatt (Walcha, NSW, Australia) [Bright stellar central condensation, tail 35’ in length and 15’ width at extremity. Method= M. Cat= TK]
2013 Feb. 08.73 UT: m1=5.7... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia) [Tail visible in 6×35 binoculars]
2013 Feb. 08.72 UT: m1=5.7... 6×35 B... David A. J. Seargent (Cowra, NSW, Australia)
2013 Feb. 08.72 UT: m1=6.1, Dia.=8.6’, DC=7/... 7x50 B... Chris Wyatt (Walcha, NSW, Australia) [Very bright stellar central condensation, tail to WSW curving to N and 30’ in length, width of tail at extremity is 16’. Method= M. Cat= TK]
2013 Feb. 07.84 UT: m1=6.2, Dia.=3', DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia) [Short broad tail clearly seen, 30′ long in PA 235 deg]
2013 Feb. 07.73 UT: m1=5.9... 6×35 B... David A. J. Seargent (Cowra, NSW, Australia) [Comet glimpsed naked eye. Rather bright forked tail visible in 25×100 to about 0.5 degrees, with brightest segment strongly curving northward]
2013 Feb. 07.31 UT: m1=6.2*, Dia.=3′, DC=7/, Tail= 0.3 deg in PA: 250°... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [nautical twilight]
2013 Feb. 06.85 UT: m1=6.3, Dia.=3′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia) [Short broad tail clearly seen, 20′ long in PA 225 deg.]
2013 Feb. 06.75 UT: m1=6.1... 6×35 B... David A. J. Seargent (Cowra, NSW, Australia) [Moonlight. Bright tail visible in 25×100 binocular telescope]
2013 Feb. 06.70 UT: m1=6.0, Dia.=5.0′, DC=6, Short Tail in PA:35°... 11×70 B... Con Stoitsis (Caulfield, Victoria, Australia) [Coma condensed towards the centre. Moon interference]
2013 Feb. 05.70 UT: m1=6.1, Dia.=5.5′, DC=6′... 11×70 B... Con Stoitsis (Caulfield, Victoria, Australia) [More condensed towards the centre Coma elongated to the NW]
2013 Feb. 05.32 UT: m1=5.9 (M), Dia.=5′, DC=6, Tail= 0.3 degree in PA: 200°... 7×50 B... Marco Goiato (Araçatuba, Brasil) [moonlight interference, clouds, comet altitude: 10 º, atmospheric extinction applied ]
2013 Feb. 05.30 UT: m1=6.3, Dia.=5′, DC=5/... 11×80 B... Jose G de S Aguiar (Campinas, Brazil)
2013 Feb. 04.32 UT: m1=6.4*, Dia.=3′, DC=7... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [nautical twilight, tail:0.1 deg in p.a.:250 using 7-cm R (28x)]
2013 Feb. 02.34 UT: m1=6.3 CCD, Dia.=3′.4... 30.5-cm SCT... Jakub Cerny (robotic telescope FRAM, Malargue, Argentina)
2013 Feb. 02.31 UT: m1=6.4, Dia.=4′, DC=6, Tail= 0.1 deg in PA: 250°... 10-cm R (70x)... Willian Souza (Sao Paulo, Brazil)
2013 Feb. 02.30 UT: m1=6.4, Dia.=5′, DC=6... 20×60 B... Willian Souza (Sao Paulo, Brazil)
2013 Feb. 01.72 UT: m1=6.5, Dia.=6’, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Tail to WSW, 12’ in length and curving slightly to NW, best visible using averted vision. Method=M. Cat=TK]
2013 Jan. 31.83 UT: m1=6.9, Dia.=3′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia)
2013 Jan. 31.72 UT: m1=6.5, Dia.=5.2’, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Coma has small stellar pseudo-nucleus, inner coma elongated to the SW with tail to the SW approximately 7’ in length but best visible using averted vision.Moonlight. Method=M... Cat=TK]
2013 Jan. 29.72 UT: m1=6.7, Dia.=6’, DC=3/4... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Moonlight affected obs, brightening twilight and observed through fog at times. The coma appears circular with a hint of elongation to SW. Method=M. Cat=TK]
2013 Jan. 29.31 UT: m1=7.0, Dia.=5′, DC=6... 11×80 B... Jose G de S Aguiar (Campinas, Brazil)
2013 Jan. 28.30 UT: m1=7.4, Dia.=1′, DC=7... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [moonlight interference]
2013 Jan. 26.28 UT: m1=7.5, Dia.=1′, DC=7/... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [moonlight interference]
2013 Jan. 25.32 UT: m1=7.3 (M), Dia.=4′, DC=7, Tail= 0.25 degree in PA: 240°... 20×100 B... Marco Goiato (Araçatuba, Brasil) [ astronomical twilight, comet altitude: 14º]
2013 Jan. 25.33 UT: m1=7.2 (S), Dia.=5′, DC=4... 7×50 B... Marco Goiato (Araçatuba, Brasil) [nautical twilight, sun altitude: -13º, comet altitude: 17º]
2013 Jan. 25.30 UT: m1=7.2, Dia.=5′, DC=5/... 25×100 B... Jose G de S Aguiar (Campinas, Brazil)
2013 Jan. 24.83 UT: m1=7.4, Dia.=2.8′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia)
2013 Jan. 24.74 UT: m1=7.2, Dia.=5’, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Twilight, tail to WSW, fan shaped WSW to ESE, tail more defined on the NW edge, 5’ in length on the longest side (WSW), ESE edge much shorter. Bright stellar pseudo nucleus with diffuse and fainter outer coma. Method=M. Cat=TK]
2013 Jan. 24.35 UT: m1=7.2 CCD, Dia.=2.0′... 30.5-cm SCT... Jakub Cerny (robotic telescope FRAM, Malargue, Argentina)
2013 Jan. 24.29 UT: m1=7.5, Dia.=2′, DC=7... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil)
2013 Jan. 23.81 UT: m1=7.5, Dia.=2.5′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia)
2013 Jan. 23.34 UT: m1=7.1 CCD, Dia.=2.6′... 30.5-cm SCT... Jakub Cerny (robotic telescope FRAM, Malargue, Argentina)
2013 Jan. 23.32 UT: m1=7.3 (M), Dia.=5′, DC=6... 20×100 B... Marco Goiato (Araçatuba, Brasil) [clouds, astronomical twilight]
2013 Jan. 23.27 UT: m1=7.6, Dia.=3′, DC=5... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 10 deg, clouds interference]
2013 Jan. 22.73 UT... m1=7.8, Dia.=2’, DC=6... 20-cm T f:10 (63x)... Chris Wyatt (Walcha, NSW, Australia) [Small bright stellar pseudo nucleus, tenuous outer coma with narrow tail 9.5’ in length to the WNW, transparent extremity. Clouds in vicinity, brightening twilight. Method=M. Cat=TK]
2013 Jan. 22.31 UT: m1=7.6, Dia.=1′, DC=7... 20×80 B... Willian Souza (Sao Paulo, Brazil)
2013 Jan. 21.84 UT: m1=7.5, Dia.=3′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Nedlands, W. Australia)
2013 Jan. 21.72 UT: m1=7.3... 10×50 B... David A. J. Seargent (The Entrance, NSW, Australia) [Strongly condensed in 25×100 binoculars]
2013 Jan. 20.32 UT: m1=7.4 (S), Dia.=5′, DC=4/... 20×100 B... Marco Goiato (Araçatuba, Brasil) [clouds, astronomical twilight]
2013 Jan. 20.30 UT: m1=8.0, Dia.=2′, DC=7... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil)
2013 Jan. 19.83 UT: m1=7.7, Dia.=4′, DC=7... 10-cm f4 refl (20x)... Andrew Pearce (Middleton Beach, W. Australia) [Coma has become very condensed with a star like false nucleus clearly visible]
2013 Jan. 19.75 UT: m1=7.6, Dia.=2.0′, DC=6... 11×70 B... Con Stoitsis (Caulfield, Victoria, Australia)
2013 Jan. 19.73 UT: m1=7.6, Dia.=2′, DC=7... 25×100 B... Michael Mattiazzo (Castlemaine, Victoria, Australia)
2013 Jan. 19.729 UT: m1=8.2, Dia.=1.5′, DC=6, Tail= 3’ in PA: 260°... 11.4-cm L f:8 (43x)... Rob Kaufman (Bright, Vic, Australia) [Ref=NOMAD1 data in ViZier. Method=M]
2013 Jan. 19.31 UT: m1=7.6, Dia.=1′, DC=7... 20×80 B... Willian Souza (Sao Paulo, Brazil)
2013 Jan. 19.30 UT: m1=8.0, Dia.=2′, DC=7... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil)
2013 Jan. 18.31 UT: m1=7.4 (M), Dia.=5′, DC=5, Tail= 10 arcmin in PA: 260°... 20×100 B... Marco Goiato (Araçatuba, Brasil)
2013 Jan. 18.30 UT: m1=8.0, Dia.=3′, DC=6/... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 17 deg, sun altitude -13 deg]
2013 Jan. 17.72 UT: m1=7.7, Dia.=6.3’, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Outer coma appears diffuse, elongated slightly to th West, small stellar central condensation. Observed in 7×50 B’s as a faint patch of light with averted vision in good seeing. Method=M. Cat=TK]
2013 Jan. 17.72 UT: m1=7.8, Dia.=2.1’, DC=6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Swan band filter enhances inner coma and central condensation slightly but not the extremity of the tail. Coma appears as a bright stellar central condensation with bright but diffused inner coma sweeping back, narrow and tapering in brightness with faint and diffuse tail extremity which fans out slightly. Tail length 5.8′ in length to WNW. Method=M. Cat=TK]
2013 Jan. 16.73 UT: m1=7.9, Dia.=2′, DC=7... 25×100 B... Michael Mattiazzo (Castlemaine, Victoria) [well condensed with a short dust tail in PA 280. Globular cluster NGC 6541 in same field of view appeared significantly brighter]
2013 Jan. 14.60 UT: m1=8.6, Dia.=1.5′, DC=6/... 11×70 B... Con Stoitsis (Nagambie, Victoria, Australia) [No tail visible]
2013 Jan. 14.29 UT: m1=8.5, Dia.=2′, DC=6/... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 12 deg, sun altitude -18 deg]
2013 Jan. 13.30 UT: m1=8.6, Dia.=2′, DC=6/... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil)
2013 Jan. 12.31 UT: m1=8.7, DC=8... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 17 deg, sun altitude -11 deg]
2013 Jan. 11.72 UT: m1=8.2, Dia.=4′, DC=7... 25×100 B... David A. J. Seargent (The Entrance, NSW, Australia) [Little changed through Swan Band filter, though possibly a little fainter]
2013 Jan. 11.71 UT: m1=8.3, Dia.=3.9’, DC=6... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Coma slightly elongated to W approx., small stellar pseudo-nucleus, coma small and almost even surface brightness, no tail, low alt. Method=M. Cat=TK]
2013 Jan. 11.30 UT: m1=8.4, Dia.= 2′, DC=5... 7-cm R (28x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 15 deg, sun altitude -14 deg]
2013 Jan. 10.83 UT: m1=8.6, Dia.=3′, DC=4... 10-cm L f:4 (20x)... Andrew Pearce (Nedlands, W. Australia]
2013 Jan. 10.30 UT: m1=8.6, Dia.=1′, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 13 deg, sun altitude -15 deg, clouds interference]
2013 Jan. 09.62 UT: m1=8.1, Dia.=3′, DC=5, Tail= 2′ in PA: 283°... 41-cm L (59x)... John Drummond (Gisborne, New Zealand) [Comet PANSTARRS easy to see. Nice coma and short tail. Comparison stars – TYC 7889197 (7.95), TYC 789365 (8.55). Comet 13 degrees altitude in the SE. Clear, no Moon, dark sky.]
2013 Jan. 08.71 UT: m1=8.4, Dia.=4.3’, DC=5/... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Moonlight, no tail, coma small, faint stellar central condensation visible in periods of good seeing, low altitude. Method=M. Cat=TK]
2013 Jan. 07.72 UT: m1=8.5, Dia.=4.8’, DC=4... 11×70 B... Chris Wyatt (Walcha, NSW, Australia) [Moonlight, no tail, bright inner coma/central condensation with diffuse outer coma. I was able to glimpse the comet using 7x50B but not good enough to make an estimate. Method= M. Cat= TK]
2013 Jan. 07.70 UT: m1=8.6, Dia.=2.6’, DC=5/... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Tail to WNW, small coma with elongation sweeping back to a broad looking tail with northern edge more pronounced and extended more than southern edge, moonlight. Method=M. Cat=TK]
2013 Jan. 07.70 UT: m1=8.0, Dia.=3.5′, DC=5/... 11×70 B... Con Stoitsis (Clonbinane, Victoria, Australia) [Coma brighter towards the centre. No tail observed]
2013 Jan. 07.31 UT: m1=8.0, Dia.=2′, DC=4... 10-cm R (25x)... Willian Souza (Sao Paulo, Brazil)
2013 Jan. 07.29 UT: m1=8.3, Dia.=1′, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 10 deg, sun altitude -16 deg, clouds interference]
2013 Jan. 06.753 UT: m1=8.4 CCD, Dia.=2.1′... 20.3-cm f2.1 SCT + QHY9 8300 Unfiltered, UCAC4 R... Terry Lovejoy (Australia)
2013 Jan. 01.741 UT: m1=8.6 CCD, Dia.=1.8′... 20.3-cm f2.1 SCT + QHY9 8300 Unfiltered, UCAC4 R... Terry Lovejoy (Australia)
2013 Jan. 01.71 UT: m1=8.3, Dia.=3’, DC=5/... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Moonlight affected, low altitude. Coma has stellar central condensation in periods of good seeing. Coma enhances moderately in Swan Band filter. At x83 the coma appears elongated to the West with a faint extension about 3’ in length using averted vision. Method=M... Cat=TK]
2012 Dec. 27.32 UT: m1=8.0: (S), Dia.=2′, DC=4... 20×100 B... Marco Goiato (Araçatuba, Brasil) [nautical twilight, comet altitude: 9º, sun altitude: -12 º]
2012 Dec. 24.748 UT: m1=9.0 CCD, Dia.=1.1′... 20.3-cm f2.1 SCT + QHY9 8300 Unfiltered, UCAC4 R... Terry Lovejoy (Australia)
2012 Dec. 24.30 UT: m=8.1:, Dia.=1′... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [altitude 8.5 deg, sun altitude -12 deg]
2012 Dec. 23.72 UT: m1=9.1, Dia.=3’, DC=5/... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small with diffuse edges, bright central condensation showing a hint of stellaring, rapidly fading to coma edge, no obvious tail was observed. Observation difficult due to low altitude, cloud in vicinity and encroaching twilight. Comet was observed in cloud gaps. Magnitude estimate not corrected for extinction. Method=M. Cat=TK]
2012 Nov. 02.87 UT: m1=10.7 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 31.37 UT: m1=10.8 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 30.373 UT: m1=11.1 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 25.368 UT: m1=11.2 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 23.373 UT: m1=11.4 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 15.40 UT: m1=11.4, Dia=1.5’, DC=5/6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and even in brightness with small central condensation, zodiacal light interference, averted vision. Method=M. Cat=AQ]
2012 Oct. 14.94 UT: m1=10.1 (S), Dia.=2′, DC=2... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 Oct. 14.37 UT: m1=11.9, Dia.=1′... 107x30-cm Visual... Terry Lovejoy (Thornlands, Queensland, Australia) [ASAS-3]
2012 Oct. 13.39 UT: m1=11.5, Dia.=1′... 107x30-cm Visual... Terry Lovejoy (Thornlands, Queensland, Australia) [ASAS-3]
2012 Oct. 12.01 UT: m1=10.6 CCD, Dia.=0.8′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Oct. 10.39 UT: m1=11.5, Dia.=1.5’, DC=6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Coma appears evenly diffuse, elongated to ENE, bright central condensation, averted vision. Method= M. Cat= AQ]
2012 Oct. 09.01 UT: m1=10.6 CCD, Dia.=0.9′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Oct. 07.93 UT: m=10.0:, DC=2/... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 Oct. 07.00 UT: m1=10.7 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Oct. 04.38 UT: m1=11.9, Dia.=1.2’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma elongated to the East, small bright central condensation, outer coma does not enhance in Swan Band filter, central condensation dims but is visible in Swan Band filter. Method=M. Cat=AQ]
2012 Oct. 04.365 UT: m1=11.8 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 03.359 UT: m1=11.8 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Oct. 01.45 UT: m1=11.0, Dia.=2.0′, DC=7... 30-cm Dobsonian... Con Stoitsis (Clonbinane, Victoria, Australia) [Coma elongated to the ESE. Stellar central condensation. No tail visible]
2012 Oct. 01.00 UT: m1=10.8 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 28.352 UT: m1=12.2 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Sep. 18.04 UT: m1=11.3 CCD, Dia.=0.6′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 16.49 UT: m1=[9.5, Dia.=!3′... 20.0-cm reflector... Man-To Hui (Luogang, Canton, China) [severe city lights in this direction]
2012 Sep. 15.03 UT: m1=11.6 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 14.39 UT: m1=12.2, Dia.=2.3’, DC=6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Elongated to ENE @ x83, coma edges best seen using averted vision, small dim stellar central condensation comparable to a mag 13.1 star, no tail, slight interference by zodiacal light. Method=M. Cat=AQ]
2012 Sep. 14.03 UT: m1=11.6 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 13.44 UT: m1=11.3... 25.4-cm reflector (71x)... David A. J. Seargent (Cowra, NSW, Australia) [Attempted to observe with 25×100 binocular telescope, but did not see it with certainty]
2012 Sep. 13.02 UT: m1=11.4 CCD, Dia.=0.6′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 12.46 UT: m1=11.3... 25.4-cm reflector (71x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 Sep. 12.02 UT: m1=11.3 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 11.42 UT: m1=11.8, Dia.=1.0′, DC=7... 20-cm L (67x)... Michael Mattiazzo (Castlemaine, Victoria)
2012 Sep. 11.03 UT: m1=11.7 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 09.43 UT: m1=11.4, Dia.=3´, DC=2... 25.4-cm reflector (71x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 Sep. 09.39 UT: m1=12.4, Dia.=0.8’, DC=5/6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Slight elongation to ENE. Observation was affected by smoke haze from nearby hazard reduction burns. Method= M. Cat= AQ]
2012 Sep. 09.35 UT: m1=10.8, Dia.=2.0′, DC3/... 30-cm Dobson... Con Stoitsis (Clonbinane, Victoria, Australia)
2012 Sep. 08.43 UT: m1=12.5 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Sep. 04.41 UT: m1=12.1, Dia.=1.5’, DC= 6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Bright stellar central condensation, coma is small and evenly diffuse, coma extension to ENE not noticeable at 39x but quite noticeable at 83x, coma does not enhance with Swan Band filter, slight interference by zodiacal light. Method=M. Cat=AQ]
2012 Sep. 04.01 UT: m1=11.6 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 03.39 UT: m1=12.4, Dia.=0.9’, DC= 6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Broad short coma extension to ENE, bright stellar central condensation. Method=M. Cat=AQ]
2012 Sep. 03.02 UT: m1=11.5 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]
2012 Sep. 02.91 UT: m=10.8, Dia.=1′, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 Aug. 21.92 UT: m=11.5:... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 Aug. 21.86 UT: m1=9.5, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Coma amplia y elongada, con débil región externa. Altura sobre el horizonte: 9º. Fin del crepúsculo astronómico. Cielo muy claro de montaña]
2012 Aug. 20.38 UT: m1=12.6, Dia.=1.7’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Inner coma has circular patch of light around stellar central condensation, broad fan-like elongation to the ENE. Central condensation enhances in Swan Band filter, outer coma does not. Method=M. Cat=AQ]
2012 Aug. 19.37 UT: m1=12.9, Dia.=1.7’, DC=5/6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, coma elongated to ENE. Small, bright, stellar central condensation, faint outer coma best visible using averted vision. Method=M. Cat=AQ]
2012 Aug. 18.04 UT: m1=11.8 CCD, Dia.=0.7′... 30.5-cm schmidt-cassegrain... Jakub Cerny (Czech Republic) [robotic telescope FRAM in Malargue, Argentina]
2012 Aug. 17.88 UT: m1=10.9, Dia.=2′, DC=3, no cola... 23.5-cm SCT(94x)... Carlos Labordena (Castellón, España)
2012 Aug. 15.93 UT: m=11.5:, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 Aug. 15.03 UT: m1=11.7 CCD, Dia.=0.6′... 30.5-cm schmidt-cassegrain... Jakub Cerny (Czech Republic) [robotic telescope FRAM in Malargue, Argentina]
2012 Aug. 14.92 UT: m=11.0, Dia.=1′, DC=6... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 Aug. 13.99 UT: m1=11.8 CCD, Dia.=0.6′... 30.5-cm schmidt-cassegrain... Jakub Cerny (Czech Republic)[robotic telescope FRAM in Malargue, Argentina]
2012 Aug. 12.13 UT: m1=[11.5... 15-cm SCT (62x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2012 Aug. 10.92 UT: m1=11.5:, Dia.=[0′.5, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [Tycho-2]
2012 Aug. 09.88 UT: m1=9.8, Dia.=5′, DC=2... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Coma amplia y elongada, con débil región externa. Altura sobre el horizonte: 11º. Fin del crepúsculo astronómico. Cielo muy claro de montaña. Estrella de mag. 11.6 (GSC) en coma]
2012 Aug. 08.94 UT: m1=11.6 (S), Dia.=2′, DC=3... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 Aug. 08.91 UT: m1=11.5, Dia.=0′.5, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [Tycho-2]
2012 Aug. 07.91 UT: m1=11.6... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [Tycho-2]
2012 Aug. 06.92 UT: m1=11.8:, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [Tycho-2]
2012 Aug. 06.38 UT: m1=12.3, Dia.=1.6’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small and elongated to the NE. Comparison stars checked using ASAS-3 data online. Method= M. Cat= AU]
2012 Aug. 06.04 UT: m1=12.1, Dia.=1.6′... 15-cm reflector... Jakub Cerny (Senohraby, Czech Republic)
2012 Aug. 05.96 UT: m1=11.6:... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [Tycho-2]
2012 Aug. 05.449 UT: m1=12.7 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Aug. 05.02 UT: m1=11.9, Dia.=1.5′... 15-cm reflector... Jakub Cerny (Senohraby, Czech Republic)
2012 Aug. 04.38 UT: m1=12.8, Dia.=0.8’, DC= 6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with elongation to NE approximately, close to bright star, bright stellar central condensation, coma disappears somewhat using Swan Band filter with only a very faint remnant of the central condensation visible. Method= M. Cat= AU]
2012 July 28.453 UT: m1=12.8 CCD, Dia.=-...20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 July 23.01 UT: m1=12.0... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [ASAS-3]
2012 July 22.91 UT: m1=10.2, Dia.=5′, DC=2/... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Mejores condiciones atmosféricas de observación permitieron realizar una estimación más brillante que la obtenida hace seis días: amplia coma con débil y muy difusa región exterior]
2012 July 20.92 UT: m1=12.0, DC=8... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [ASAS-3]
2012 July 20.88 UT: m1=12.7, Dia.=1′.0, DC=7/... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 19.91 UT: m1=12.0, Dia.=0.5′, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [ASAS-3]
2012 July 19.85 UT: m1=12.5, Dia.=1′.3, DC=7... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 19.52 UT: m1=12.4, Dia.=1.5′... 25.4-cm reflector (71x)... David A. J. Seargent (Cowra, NSW, Australia) [Possibly elongated at 114x]
2012 July 18.52 UT: m1=12.6, Dia.=1′... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia) [Poss seen at 71X, (m = 12.4) but clouds prevented confirmation.]
2012 July 17.85 UT: m1=12.7, Dia.=1′.3, DC=7... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 16.91 UT: m1=11.1, Dia.=3.5′, DC=3... 20-cm SCT (100x)... Juan José González (Pandorado, 1190 m alt., León, España)[Coma elongada con región exterior débil y muy difusa, probablemente más amplia que 6′]
2012 July 16.37 UT: m1= 12.8, Dia.=1.5’, DC=6... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [Small bright central condensation with faint outer coma, best visible using averted vision at x39. Method= M. Cat= AQ]
2012 July 15.85 UT: m1=12.2, Dia.=1′.0, DC=7... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 15.37 UT: m1=12.5, Dia.=1.2’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Bright stellar central condensation, wispy faint outer coma which is broad and elongated to the ENE. Comparison stars checked using ASAS-3 online catalogue. Method= M. Cat= AU]
2012 July 13.60 UT: m1=12.8, Dia.=1′... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 July 12.94 UT: m1=11.3, Dia.=2.5′, DC=4... 20-cm SCT (133x)... Juan José González (Pandorado, 1190 m alt., León, España)[Coma elongada con región exterior débil y muy difusa, probablemente más amplia que 6′]
2012 July 12.94 UT: m1=12.1:, Dia.=[0′.5, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil) [ASAS-3]
2012 July 11.07 UT: m1=12.1 CCD, Dia.=0′.5... 30.5-cm schmidt-cassegrain... Jakub Cerny (Senohraby, Czech Republic)
2012 July 10.12 UT: m1=12.2 CCD, Dia.=0’.4... 30.5-cm schmidt-cassegrain... Jakub Cerny (Senohraby, Czech Republic)
2012 July 08.58 UT: m1=12.0, Dia.=1.4′, DC=4/... 20-cm f/5 reflector (119x)... Man-To Hui (Luogang, Canton, China) [city light pollution]
2012 July 07.49 UT: m1=12.8 CCD... 20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 July 06.57 UT: m1=12.0, Dia.=1.2′, DC=4... 20-cm f/5 reflector (119x)... Man-To Hui (Canton, China) [light pollution... moonlight towards the end of observation]
2012 June 24.97 UT: m1=12.5:, Dia.=[0.5′, DC=7... 18-cm L (57x)... Alexandre Amorim (Florianopolis, Brazil)
2012 June 24.47 UT: m1=12.9, Dia.=0.7’, DC=6... 25-cm L f:5 (83x) [Chris Wyatt, Walcha, NSW, Australia] [No tail, outer coma very faint, small stellar central condensation. Extinction applied. Method= S... Cat= AQ]
2012 June 23.90 UT: m1=13.0:, Dia.=0.5′, DC=6... 30-cm L f:5 (188x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Comparison stars taken from ASAS-3 catalogue (AU). Comet alt. 10.5 deg... faintest star 14.98+/-0.05 mag (AQ)in FOV at 188x]
2012 June 23.42 UT: m1=13.1, Dia.=0.8’, DC=6... 25-cm L f:5 (83x) [Chris Wyatt, Walcha, NSW, Australia] [Coma has diffuse outer coma, coma elongated to NE approximately. Method= M... Cat= AQ]
2012 June 22.85 UT: m1=12.7, Dia.=0.6′, DC=2... 25.4-cm reflector (171x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 22.85 UT: m1=12.3, Dia.=0.3′, DC=3... 25.4-cm reflector (120x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 20.85 UT: m1=12.5, Dia.=0.5′, DC=3... 25.4-cm reflector (171x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 20.85 UT: m1=12.2, Dia.=0.3′, DC=3... 25.4-cm reflector (120x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 20.52 UT: m1=13.1, Dia.=0.7′... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 June 19.53 UT: m1=13.0, Dia.=1′... 25.4-cm reflector (71x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 June 19.43 UT: m1=13.0, Dia.=0.5’, DC=6/... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma elongated to NE approximately, disappears when Swan Band filter is applied, at x156 the elongation could be described as a tail 0.2’ in length in position angle 067°. Method= M. Cat= AQ]
2012 June 18.90 UT: m1=12.2, Dia.=0.7′, DC=5... 20.3-cm L f:6 (150x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Comparison stars taken from ASAS All Star Catalogue (AU). Comet alt. 11.6 deg... Faintest star 13.9 mag in FOV at 150x. The same comparison stars from APASS (AQ) give also the m1=12.2, whereas from GSC catalogue (HS) give much worse value m1=12.9]
2012 June 18.38 UT: m1=13.4, Dia.=0.5’, DC=6/... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, coma small and has bright stellar central condensation, coma elongated to the NE. Method=M. Cat= AQ]
2012 June 18.08 UT: m1=11.9 (S), Dia.=1′, DC=5... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 June 16.98 UT: m1=12.6, Dia.=0.8′, DC=4, no tail... 23.5-cm SCT (138x)... Carlos Labordena (Castellón, España)
2012 June 15.40 UT: m1=12.8, Dia.=0.5’, DC=7... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, observation made difficult due to crowded star field, coma elongated to NE. Method= M. Cat= AQ]
2012 June 14.85 UT: m1=12.5, Dia.=0.5′, DC=3... 25.4-cm reflector (171x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 14.85 UT: m1=12.9, Dia.=0.2′, DC=6... 25.4-cm reflector (120x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 June 14.39 UT: m1=12.8, Dia.=0.5’, DC=6/7... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, small compact central condensation. Method= M. Cat= AQ]
2012 June 13.95 UT: m1=11.8, Dia.=3.0′, DC=2/... 20-cm SCT (133x)... Juan José González (Alto del Castro, 1720 m alt., León, España) [Condensación central con m2=13.3 (GSC), rodeada de una coma difusa ].
2012 June 12.46 UT: m1=13.1... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 June 12.12 UT: m1=12.0, Dia.=1′, DC=4... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 June 08.99 UT: m1=12.4, Día.=1′... 25-cm STC + CCD... Fernando Tifner y Luis Mansilla (Rosario, Argentina) [CCD box 60×60”]
2012 May  26.502 UT: m1=12.8 CCD, Dia.=0.7′...20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 May  21.58 UT: m1=13.3, Dia.=0.9′... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 May  19.435 UT: m1=13.1 CCD, Dia.=0.7′...20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 May  18.54 UT: m1=13.3... 25.4-cm reflector (114x)... David A. J. Seargent (Cowra, NSW, Australia)
2012 May  17.456 UT: m1=13.1 CCD, Dia.=0.7′...20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 May  15.08 UT: m1=12.2, Dia.=2.5′, DC=2... 20-cm SCT (133x)... Juan José González (Pandorado, 1190 m alt., León, España) [Condensación central de m2=14.2 (HN), rodeada de una coma débil y difusa. Estrellas de campo comprobadas en el DSS. Estrellas de comparación para m2 tomadas de la fotometría Henden de HP Lib. Cielo muy claro de montaña]
2012 May  13.451 UT: m1=13.3 CCD, Dia.=0.7′...20.3-cm f:2.1 SCT... Terry Lovejoy (Thornlands, Queensland, Australia) [CCD QHY9 8300 Unfiltered, UCAC4 R]
2012 Mar. 28.19 UT: m1=14.6, Dia.=0.3′, DC=7... 20-cm SCT (200x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m., León, España)[Estrellas de campo comprobadas en el DSS. Estrellas de comparación de la fotometría Henden, campo de HP Lib. Cielo muy claro de montaña]