141P/Machholz 2 Component A

141P/Machholz 2 Component A
Reported observations:
2015 Oct. 15.77 UT: m1=16.5: CCD, Dia.=&0.3′ ... [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer... A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2015 Sep. 21.81 UT: m1=11.8, Dia.=1.1′, DC=1 ... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan)
2015 Sep. 18.49 UT: m1=13.0 CCD, Dia.=1.3′ ... [T20] 0.1-m f/5.0 astrograph + CCD... A. Novichonok & T. Prystavski (iTelescope observatory, H06 (remotely from Mayhill, U.S.A.)
2015 Sep. 18.14 UT: m1=12.3, Dia.=1.6′, DC=3 ... 32.0-cm L f/5 (96x)... Uwe Pilz (Leipzig, Germany)
2015 Sep. 13.48 UT: m1=13.0 CCD, Dia.=1.4′ ... [T20] 0.1-m f/5.0 astrograph + CCD... A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)
2015 Sep. 13.11 UT: m1=10.8, Dia.=2.5′, DC=1 ... 60.3-cm L (189x)... Sandor Szabo (Sopron, Hungary) [With SWAN filter it becames 4.5’ diameter, DC=2]
2015 Aug. 28.17 UT: m1=11.2, Dia.=2.5′, DC=2 ... 20-cm SCT (100x)... Juan José González (Cea, alt. 875 m, León, España) [Observado después del ocaso lunar. Estrellas de campo comprobadas en el DSS. Luz Zodiacal. Comienzo del crepúsculo astronómico. Altura sobre el horizonte: 23º. Cielo muy claro de montaña]
2015 Aug. 26.46 UT: m1=12.3: CCD, Dia.=&1.9′ ... [T20] 0.1-m f/5.0 astrograph + CCD... A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)
2015 Aug. 24.04 UT: m1=12.6: CCD, Dia.=2.2′ ... 0.3-m f/1.5 astrograph + CCD... G. Borisov & T. Prystavski (MARGO – MPC L51 Crimea-Nauchnij)
2015 Aug. 23.97 UT: m1=11.9: (Tri-G), Dia.=2.2′ ... Nikon 5200 + 135-mm lens... Artyom Novichonok (Konchezero, Russia)
2015 Aug. 23.06 UT: m1=12.6: CCD, Dia.=2.3′ ... 0.3-m f/1.5 astrograph + CCD... G. Borisov & T. Prystavski (MARGO – MPC L51 Crimea-Nauchnij)
2015 Aug. 22.04 UT: m1=12.3: CCD, Dia.=&2.3′ ... 0.3-m f/1.5 astrograph + CCD... G. Borisov & T. Prystavski (MARGO – MPC L51 Crimea-Nauchnij)
2015 Aug. 15.06 UT: m1=[15.0 ... 60.3-cm L (244x)... Sandor Szabo (Sopron, Hungary) [NEGATIVE, not seen]
2015 July 13.10 UT: m1=14.3: CCD, Dia.=&1.4′ ... [T16] 0.15-m f/7.3 refractor + CCD... A. Novichonok & T. Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)
2015 July 11.99 UT: m1=14.6, Dia.=0.8′, DC=3 ... 35-cm L (178x)... Jakub Černý (Zachotin, Czech Republic)
2015 July 10.98 UT: m1=14.9, Dia.=0.5′, DC=3 ... 35-cm L (178x)... Jakub Cerný (Zachotin, Czech Republic)
2005 Apr. 05.44 UT: m1=11.1, Dia.=2.0', DC=1 ... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Ibaraki, Japan) [Faint and widely diffused, but actually visible. Maybe my estimation of the size is too large, and the magnitude is too bright, comparing to the recent observations by others.]
2005 Apr. 04.73 UT: m1=13.1:, Dia.=1', DC=2 ... 36-cm L (90x)... A. Baransky (Pylypovychi, Ukraine)
2005 Mar. 29.73 UT: m1=12.0:, Dia.=1.1', DC=2 ... 36-cm L (90x)... A. Baransky (Pylypovychi, Ukraine)
2005 Mar. 11.83 UT: m1=11.7, Dia.=0.8', DC=2 ... 20-cm SCT (77x)... Juan Jose Gonzalez (Camposagrado, alt. 1135 m., León, North Spain) [Mountain location. Zodiacal light. Comet's altitude: 10 deg.]
2005 Mar. 09.10 UT: m1=12.3, Dia.=1', DC=2 ... 41-cm L ... Alan Hale (Cloudcroft, New Mexico) [low altitude and strong zodiacal light; faint and difficult, but definite. This observation confirms suspects that were observed on the previous two evenings.]
2005 Mar. 08.41 UT: m1=[9.1 ... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Ibaraki, Japan) [I tried to see it, but failed. It was not clear in the evening very low sky, so the limiting magnitude was not deep. The position was calculated from the orbital elements with the perihelion passage at Feb. 28.22 (UT), based on the recent images by Michael Jager]
2000 Feb. 05.75 UT: m1=11.9:, Dia.=1.9', DC=2 ... 25.4-cm L (65x)... Maik Meyer (Frauenstein, Germany)
2000 Feb. 01.74 UT: m1=12.1, Dia.=1', DC=2 ... 11-cm L (70x)... Alexander Baransky (Observatory of Kyiv University, Ukraine)
2000 Jan. 30.50 UT: m1=12.5:, Dia.=2', DC=1 ... 20-cm L (45x)... Michael Mattiazzo (Wallaroo, South Australia) [object is very diffuse, has it survived perihelion?]
2000 Jan. 26.77 UT: m1=11.5, Dia.=1.4', DC=2 ... 44-cm L (63x)... Werner Hasubick (Buchloe, Germany)
2000 Jan. 25.57 UT: m1=12.3, Dia.=1.5', DC=1 ... 41-cm L... Andrew Pearce (Nedlands, Western Australia) [Difficult object of low surface brightness in a bright sky]
2000 Jan. 13.71 UT: m1=9.8, Dia.=5', DC=2 ... 11-cm L (50x)... Alexandr Baransky (Observatory of Kiev University, Ukraine)
2000 Jan. 12.72 UT: m1=9.6, Dia.=4.5', DC=3 ... 11-cm L (50x)... Alexander Baransky (Observatory of Kyiv University, Ukraine)
2000 Jan. 10.51 UT: m1=9.5, Dia.=4', DC=3 ... 20-cm L (45x)... Michael Mattiazzo (Wallaroo, South Australia)
2000 Jan. 05.70 UT: m1=9.5, Dia.=4.0', DC=2/ ... 25.4-cm L (65x)... Maik Meyer (Frauenstein, Germany) 
2000 Jan. 08.74 UT: m1=10.8, dia.=2.1', DC=2 ... 44 -cm L (63x)... Werner Hasubick (Buchloe, Germany)
2000 Jan. 05.69 UT: m1=10.0, Dia.=4', DC=7 ... 25-cm L (30x)... C. Segarra (Algimia, Spain)
2000 Jan. 04.50 UT: m1=10.4, Dia.=3', DC=2 ... 20-cm L (45x)... Michael Mattiazzo (Wallaroo, South Australia)
2000 Jan. 03.50 UT: m1=10.2, Dia.=3', DC=2 ... 20-cm L (45x)... Michael Mattiazzo (Wallaroo, South Australia)
2000 Jan. 02.72 UT: m1=9.4, Dia.=5.5', DC=2/ ... 20x100 B... Maik Meyer (Frauenstein, Germany) [Comet close to two 8th mag stars.]
2000 Jan. 02.55 UT: m1=9.8, Dia.=7.8', DC=3 ... 20x80 B... Andrew Pearce (Dowerin, Western Australia) [Comet easily visible in binoculars. Comet also observed in 41-cm reflector at Jan 2.54UT: m1=10.3, Dia.=4', DC=3.]
1999 Dec. 26.53 UT: m1=10.1, Dia.=4.5', DC=2 ... 20-cm L... Andrew Pearce (Seabird, Western Australia)[Easily visible as a large diffuse object despite the bright sky background of the zodiacal light. Also visible in 20x80B where at Dec 26.53UT, m1=9.8, Dia.=5.3', DC=2. Component D also searched for, however at the time of observation it was located almost on top of a 10th mag star.]
1999 Dec. 11.73 UT: m1=11.3, Dia.=1.3', DC=2 ... 27-cm L (120x)... Toth Zoltan (Fertoszentmiklos, Hungary)
1999 Dec. 08.71 UT: m1=11.5, Dia.=1.5', DC=2 ... 27-cm L (83x)... Toth Zoltan (Fertoszentmiklos, Hungary)
1999 Dec. 06.80 UT: m1=11.1, Dia.=6', DC=3 ... 45-cm L (100x)... J. M. San Juan (Avila, Spain) [component A]
1999 Dec. 06.79 UT: m1=11.8, Dia.=3.5', DC=3 ... 45-cm L (100x)... J. Carvajal (Avila, Spain) [component A]
1999 Dec. 06.47 UT: m1=12.0:, Dia.=2', DC=2 ... 20-cm L (158x)... Michael Mattiazzo (Wallaroo, South Australia) [low altitude and zodiacal light interference makes observations rather difficult]
1999 Dec. 05.48 UT: m1=12.0:, Dia.=1', DC=3 ... 20-cm L (158x)... Michael Mattiazzo (Wallaroo, South Australia)
1999 Dec. 04.70 UT: m1=10.6, Dia.=2.9', DC=2/ ... 25.4-cm L (65x)... Maik Meyer (Frauenstein, Germany)
1999 Nov. 29.71 UT: m1=11.8, Dia.=1.8', DC=3 ... 25.4-cm L (104x)... Maik Meyer (Frauenstein, Germany)
1999 Nov. 29.23 UT: m1=11.9, Dia.=2', DC=3 ... 25.6-cm L (84x)... Nicolas Biver (Mokuleia, Oahu, HI)
1999 Nov. 27.73 UT: m1=12.8, Dia.=0.7', DC=3 ... 44-cm L (156x)... Werner Hasubick (Buchloe, Germany)
1999 Nov. 26.47 UT: m1=[12.0 ... 20-cm L (158x)... Michael Mattiazzo (Wallaroo,South Australia)
1999 Nov. 02.50 UT: m1=[12.5, Dia.=0.5' ... 41-cm L (200x)... Andrew Pearce (Nedlands, Western Australia) [The predicted positions at the time of observation for both the A and D components were checked, but nothing was seen at either location.]
1999 Nov. 02.23 UT: m1=14.0:, Dia.=1', DC=3 ... 25.6-cm L (84x)... Nicolas Biver (Dillingham, Oahu, HI) [m1=14.1: in 25.6-cm L (169x) - quite uncertain and needs further confirmation, although seen right at predicted position (for nucleus A) with no background star (from DSS) - faintest stars nearby: m=15. Certainly fainter than 106P/Schuster]
1999 Oct. 31.74 UT: m1=13.8, Dia.=0.5', DC=3 ... 44-cm L (156x)... Werner Hasubick (Buchloe, Germany) [Component A]
1999 Oct. 31.73 UT: m1=[12.5, Dia.=1.0' ... 25.4-cm L (104x)... Maik Meyer (Frauenstein, Germany)
1999 Oct. 26.50 UT: m1=[12.5, Dia.=0.5' ... 41-cm L (200x)... Andrew Pearce (Nedlands, Western Australia) [Comet not visible. Observation made just prior to moonrise.]