C/2011 F1 (LINEAR)

C/2011 F1 (LINEAR)
2013 Sep. 27.60 UT: m1=16.0 CCD, Dia.=0.5′... 0.32-m f/7.4 Ritchey-Chretien + CCD... A. Novichonok & T.Prystavski (iTelescope observatory, Q62. Remotely Siding Spring, Australia)
2013 Aug. 02.77 UT: m1=15.4: CCD, Dia.=0.51′, Tail= 0.6′ in PA: 220 deg ... 0.32-m f/7.4 Ritchey-Chretien + CCD... A. Novichonok & T. Prystavski (iTelescope observatory Q62. Remotely Siding Spring, Australia)
2013 July 03.81 UT: m1=14.8 CCD, Dia.=0.74′, Tail=&7′ in PA 209 deg ... 0.11-m f/5.0 refractor + CCD... A. Novichonok & T.Prystavski (iTelescope observatory Q62. Remotely Siding Spring, Australia)
2013 May  10.80 UT: m1=14.3 CCD, Dia.=0.81′, Tail= 3.1′ in PA 221 deg ... 0.11-m f/5.0 refractor + CCD... A. Novichonok & T.Prystavski (iTelescope observatory, Q62 (remotely Siding Spring, Australia)
2012 Nov. 04.78 UT: m1=9.0, Dia.=5′, DC=3... 20-cm SCT (100x)... Juan José González (Collada del Fresno – Sierra del Aramo, alt. 1221 m, Asturias, España) [Altura sobre el horizonte: 6º. Cielo muy claro de montaña]
2012 Oct. 05.81 UT: m1=9.3, Dia.=7′, DC=2/... 20-cm SCT (77x)... Juan José González (Ranedo de Curueño, alt. 1075 m, León, España) [Altura sobre el horizonte: 17º. Cielo muy claro de montaña]
2012 Sep. 20.19 UT: m1=13.4 CCD, Dia.= 0.8’... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 Sep. 17.21 UT: m1=12.3 CCD, Dia.=1.0’, Tail= 2,0′ PA: 14°... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 Sep. 15.72 UT: m1=12.1, Dia.=2.2′, DC=3... 35.6-cm L (133x)... Artyom Novichonok (Shadzhatmaz, Caucasus, Russia)
2012 Sep. 14.38 UT: m1=11.0, Dia.=3.8’, DC=4/5... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, appears elongated to WNW, small central condensation, almost stellar with gradual brightening from edges to inner coma. Extinction corrected. Method=S. Cat=TA]
2012 Sep. 14.02 UT: m1=13.5 CCD, Dia.=0.7’... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 Sep. 13.86 UT: m1=9.8, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Coma elongada]
2012 Sep. 13.80 UT: m1=11.4, Dia.=3.5′, DC=4/... 35-cm reflector (107x)... Jakub Cerny (Senohraby, Czech Republic)
2012 Sep. 11.72 UT: m1=11.9, Dia.=2.5′, DC=4/... 35.6-cm L (64x)... Artyom Novichonok (Shadzhatmaz, Caucasus, Russia) [Big, diffuse]
2012 Sep. 09.81 UT: m1=12.3, Dia.=3.0′, DC=4... 50.8-cm L (189x)... Sandor Szabo (Sopron, Hungary) [Coma is elongated to PA 310 deg.]
2012 Sep. 09.81 UT: m1=10.0, Dia.=2.5′, DC=2... 32-cm L f:5 (96x)... Uwe Pilz (Leipzig, Germany)
2012 Sep. 07.94 UT: m1=10.5 (S), Dia.=3′, DC=2/... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 Sep. 06.85 UT: m1=10.4, Dia.=6′, DC=3... 20-cm SCT (100x)... Juan José González (Llamas de Rueda, alt. 990 m, León, España)
2012 Sep. 04.40 UT: m1=11.6... Dia.=3.2’, DC=2... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, close to bright star, diffuse coma. Method=S... Cat=TA]
2012 Sep. 03.37 UT: m1=11.8, Dia.=2’, DC=3/4... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, small bright central condensation noticeable in good seeing using averted vision. Method=S. Cat=TA]
2012 Aug. 24.08 UT: m1=12.6 CCD, Dia.=0.7’, Tail= 1.6′ PA: 93°... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 Aug. 23.53 UT: m1=10.8, Dia.=3.0′, DC=3... 20.0-cm reflector... Man-To Hui (Luogang, Canton, China) [city light pollution and moonlight]
2012 Aug. 21.91 UT: m1=10.8, Dia.=3.5′, DC=3... 20-cm SCT (100x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrella de mag. 11.4 (Tycho-2) en coma]
2012 Aug. 19.86 UT: m1=11.3, Dia.=1.5′, DC=4... 20.3-cm L f:6 (63x)... Piotr Guzik (Szklary, Poland) [Method=M... Cat=TK]
2012 Aug. 19.36 UT: m1=12.9, Dia.=1.3’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, close to bright star, tenuous outer coma increasing in brightness to centre, almost stellar central condensation. Method=S. Cat=TA]
2012 Aug. 18.85 UT: m1=12.4, Dia.=1.5′... 32-cm reflector... Uwe Pilz (Leipzig, Germany)
2012 Aug. 18.46 UT: m1=10.6, Dia.=2.4′, DC=3... 40.0-cm L f/4.5 (75x)... Seiichi Yoshida (Gunma, Japan)
2012 Aug. 17.89 UT: m1=11.8, Dia.=2′, DC=2, no tail... 23.5-cm SCT(138x)... Carlos Labordena (Castellón, España)
2012 Aug. 14.98 UT: m1=11.9 CCD, Dia.=1.1′... 30.5 -cm schmidt-cassegrain... Jakub Cerny (Czech Republic) [robotic telescope FRAM in Malargue, Argentina]
2012 Aug. 12.13 UT: m1=[11.3... 15-cm SCT (62x)... Salvador Aguirre (Hermosillo, Sonora, Mexico)
2012 Aug. 09.94 UT: m1=11.0, Dia.=3.5′, DC=3... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrella de mag. 12.4 (GSC) en coma]
2012 Aug. 06.38 UT: m1=12.2, Dia.=2.5’, DC= 3... 25-cm L, f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, close to bright star. Method= S... Cat= TA]
2012 Aug. 05.11 UT: m1=13.0 CCD, Dia.=0.8’... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 Aug. 04.94 UT: m1=10.8 (S), Dia.=2.5′, DC=2... 22-cm L (120x)... Marco Goiato (Araçatuba, Brasil)
2012 Aug. 04.37 UT: m1=12.2, Dia.=1.7’, DC=4/5... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, small but almost stellar central condensation, appears stellar at times using averted vision in periods of good seeing. Method= M. Cat= TA]
2012 July 23.89 UT: m1=11.8, Dia.=1.5′, DC=3... 20.3-cm L f:6 (63x)... Piotr Guzik (Szklary, Poland) [Method=M... Cat=TK]
2012 July 23.01 UT: m1=10.8, Dia.=5′, DC=2/... 20-cm SCT (100x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2012 July 22.95 UT: m1=11.7, Dia.=2′... 32-cm reflector... Uwe Pilz (Leipzig, Germany)
2012 July 20.94 UT: m1=11.0 (S), Dia.=2′, DC=2... 22-cm L (120x)... Marco Goiato (Araçatuba, Brasil)
2012 July 20.93 UT: m1=12.2, Dia.=1′.6, DC=5/... 35-cm reflector (73x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 20.10 UT: m1=12.7 CCD, Dia.=0.8’, Tail= 0.5′ in PA: 323°... Measures taken on CCD images... Pierre Laporte (Centre d’Observation Astronomique des Monts Notre-Dame, Québec, Canada)
2012 July 19.93 UT: m1=12.2, Dia.=1′.5, DC=5... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 18.92 UT: m1=12.1, Dia.=1′.5, DC=6... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 17.93 UT: m1=12.3, Dia.=1′.6, DC=6... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 16.99 UT: m1=11.1, Dia.=5′, DC=3/... 20-cm SCT (77x)... Juan José González (Pandorado, 1190 m alt., León, España)
2012 July 16.89 UT: m1=12.7, Dia.=0.7′, DC=2... 25.4-cm reflector (120x)... V. Ivanov (Melovoe, Russia) [Low condensed coma. Comet is visible only with averted vision. Not wind, t+24°C. LM=6.6m]
2012 July 16.36 UT: m1=11.9, Dia.=1.5’, DC=2... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, coma has broad, even brightness with faint edges, averted vision. Extinction corrected, Method= S. Cat= TA]
2012 July 15.89 UT: m1=12.5, Dia.=1.0′, DC=3... 20.3-cm reflector (120x)... V. Ivanov (Atamanovka, near Saratov, Russia) [Low condensed coma, Comet is visible only with averted vision. Not wind, t+20°C. LM=6.0m]
2012 July 15.88 UT: m1=12.3, Dia.=1′.5, DC=6... 35-cm reflector (117x)... Jakub Cerny (Korcula Island, Croatia)
2012 July 15.36 UT: m1=12.3, Dia.=1.2’, DC=2/3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, averted vision, slight haze in the atmosphere at the time of obs. Extinction corrected, Method= S. Cat= TA]
2012 July 13.00 UT: m1=11.2, Dia.=4.5′, DC=3/... 20-cm SCT (100x)... Juan José González (Pandorado, 1190 m alt., León, España)
2012 July 07.58 UT: m1=12.2, Dia.=1.1′, DC=2... 20-cm f/5 reflector (119x)... Man-To Hui (Luogang, Canton, China) [light pollution]
2012 July 05.94 UT: m1=11.1 (S), Dia.=2′, DC=2... 22-cm L (160x)... Marco Goiato (Araçatuba, Brasil)
2012 June 24.45 UT: m1=11.2, Dia.=1.2’, DC=2... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, averted vision. Extinction applied. Method= S... Cat= TK]
2012 June 23.40 UT: m1=12.5, Dia.=1.3’, DC=2/3... 25-cm L f:5 (39x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, coma diffuse, slightly brighter central condensation than the edges, averted vision, slight moonlight interference. Extinction applied. Method= S. Cat= AQ]
2012 June 22.94 UT: m1=12.8, Dia.=1′, DC=2, Tail= 0.03 degree in PA: 120 degrees... 32-cm reflector... Uwe Pilz (Leipzig, Germany)
2012 June 19.42 UT: m1=11.5, Dia.=1.4’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, observation made difficult due to nearby bright star, best visible in periods of good seeing using averted vision. Extinction applied. Method= S. Cat= AQ]
2012 June 18.37 UT: m1=11.5, Dia.=1.2’ DC=1... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail, averted vision. Extinction applied. Method=S. Cat=AQ]
2012 June 16.94 UT: m1=11.3, Dia.=3′, DC=2, no tail... 23.5-cm SCT (94x)... Carlos Labordena (Castellón, España)
2012 June 15.39 UT: m1=11.4, Dia.=1’, DC=2/3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, no tail. Extinction applied. Method= S. Cat= AQ]
2012 June 14.37 UT: m1=11.5, Dia.=0.8’, DC=3... 25-cm L f:5 (83x)... [Chris Wyatt (Walcha, NSW, Australia) [Comet low on Northern horizon, averted vision, difficult, visible in periods of good seeing. Extinction applied. Method= S. Cat= AQ]
2012 June 14.05 UT: m1=10.7, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Alto del Castro, 1720 m alt., León, España) [amplia y difusa coma]
2012 May  19.98 UT: m1=12.6, Dia.=1.2′, DC=4... 20.3-cm L f:6 (100x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland) [Comparison stars taken from APASS V-band photometry (AQ). Faintest star 14.1 mag (HS) in FOV at 100x]
2012 May  17.91 UT: m1=12.3 , Dia.=1′, DC=6... Tail= 0.03 deg. in PA: 270 deg ... 32-cm reflector (96x)... Uwe Pilz (Leipzig, Germany)
2012 May  14.98 UT: m1=11.1, Dia.=5′, DC=3... 20-cm SCT (77x)... Juan José González (Pandorado, 1190 m alt., León, España) [Observación realizada desde localidad de montaña, más elevada que en mi estimación previa del 9 de Mayo, obteniendo en esta ocasión un mayor diámetro de coma y una m1 algo más brillante. Varias estrellas en la coma, teniendo la más brillante mag. 13.6 (GSC)]
2012 May  13.97 UT: m1=12.8, Dia.=1.2′, DC=6... 20.3-cm L f:6 (100x)... Mieczyslaw Leszek Paradowski (Dabrowa, Poland)[Comparison stars taken from APASS V-band photometry (AQ). VLmag=6.5 and the faintest star 14.6 mag (AQ) seen in FOV at 100x]
2012 May  10.91 UT: m1=12.8, Dia.=0.8′, DC=5... 25.4-cm S f:4 (127x)... Mieczyslaw Leszek Paradowski (Lublin, Poland) [Comparison stars taken from APASS V-band photometry (AQ). VLmag=5 and faintest star 13.9 mag (AQ) seen in FOV at 127x]
2012 May  09.96 UT: m1=11.5, Dia.=2.5′, DC=3/... 20-cm SCT (77x)... Juan José González (El Fito – Sierra del Sueve, 570 m alt., Asturias, España) [Observación realizada desde una ubicación a más baja altitud que en mi estimación previa del 8 de Abril, obteniendo en esta ocasión un menor diámetro de coma y una m1 algo más débil]
2012 Apr. 24.85 UT: m1=13.3, Dia.=1.0′, DC=5... 25.4-cm reflector (120x)... Vyacheslav Ivanov (Melovoe, Russia)
2012 Apr. 21.90 UT: m1=11.6, Dia.=4′, DC=3, no cola... 23.5-cm SCT (138x)... Carlos Labordena (Castellón, España)
2012 Apr. 21.68 UT: m1=13.7, Dia.=1.1′, DC=6... 21.0-cm Cassegrain... M.-T. Hui (Mt. Mulan, Wuhan, China)
2012 Apr. 08.87 UT: m1=11.2, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Pandorado, alt. 1190 m., León, España) [Desde cielos oscuros de montaña la coma se muestra amplia y difusa, con débil región externa. Varias estrellas en la coma, la más brillante de mag. 13.7 (GSC)]
2012 Mar. 28.11 UT: m1=11.7, Dia.=2.5′, DC=4... 20-cm SCT (100x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m., León, España)
2012 Mar. 15.06 UT: m1=11.5, Dia.=3′, DC=3... 20-cm SCT (100x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m., León, España) [Significativamente más brillante que lo esperado. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2012 Jan. 03.17 UT: m1=13.7, Dia.=0.5′, DC=6... 20-cm SCT (133x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m., León, España) [Estrellas de campo comprobadas en el DSS. Estrellas de comparación tomadas de la fotometría Henden del sector HS550. Cielo muy claro de montaña]
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