237P/LINEAR

237P/LINEAR
2016 Nov. 16.76 UT: m1=9.8, Dia.=3′, DC=2/... 20-cm SCT (77x)... Juan José González (Gamoniteiro – Sierra del Aramo, alt. 1730 m, Asturias, España) [Crepúsculo astronómico. Altura sobre el horizonte: 12º. Cielo muy claro de montaña]
2016 Nov. 05.38 UT: m1=12.0, Dia.=0.7′, DC=3... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Nov. 04.38 UT: m1=[11.6... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Nov. 01.40 UT: m1=12.5, Dia.=1’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre]
2016 Oct. 31.41 UT: m1=12.3, Dia.=0.9’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to bright stars. Weakly condensed. Low altitude = 15.4°]
2016 Oct. 29.78 UT: m1=10.6, Dia.=3′, DC=2, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Oct. 26.78 UT: m1=9.5, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Pandorado, alt. 1190 m, León, España) [Fin del crepúsculo astronómico. Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2016 Oct. 25.39 UT: m1=12.5, Dia.=0.8’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia] [Coma very diffuse, weakly condensed centre, pale blue in colour. Does not enhance in Swan Band filter]
2016 Oct. 24.41 UT: m1=12.4, Dia.=0.8’, DC=3... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [No tail. Inner coma opaque and pale blue in colour, gradually fades to edges. Slight zodiacal light interference, low altitude = 18.2°]
2016 Oct. 23.40 UT: m1=12.3, Dia.=1.5’, DC=2/... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Poor seeing... coma showed an opaque and weakly condensed centre, pale blue in colour, fading to edges. No enhancement in Swan Band filter. No tail. Slight interference by zodiacal light]
2016 Oct. 20.41 UT: m1=12.4, Dia.=0.6′, DC=5... 40.0-cm L f/4.5 (257x)... Seiichi Yoshida (Gunma, Japan)
2016 Oct. 19.41 UT: m1=12.5, Dia.=1’, DC=4... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, inner coma moderately condensed and opaque, pale blue in colour. Does not enhance in Swan Band filter]
2016 Oct. 18.40 UT: m1=12.3, Dia.=0.5’, DC=4... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, brightening to an opaque, moderately condensed inner coma. Does not enhance in Swan Band filter. Slight interference from zodiacal light]
2016 Oct. 04.43 UT: m1=12.9, Dia.=0.9’, DC=4... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, brightening to a moderately condensed centre. No tail. Does not enhance in Swan Band filter. Low altitude = 18.4°. Slight haze and windy conditions, zodiacal light interference]
2016 Oct. 02.81 UT: m1=9.6, Dia.=6′, DC=2/, Tail= 0.5 deg. in PA: 70 deg ... 20-cm SCT (77x)... Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 13º. Cielo muy claro de montaña]
2016 Sep. 30.80 UT: m1=11.6, Dia.=2′, DC=2, no tail... 20-cm SCT (117x)... Carlos Labordena (Castellón, España)
2016 Sep. 28.81 UT: m1=9.7, Dia.=5′, DC=2/, Tail= 0.2º en AP: 80º... 20-cm SCT (100x)... Juan José González (Alto del Castro, alt. 1720 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 13º. Cielo muy claro de montaña]
2016 Sep. 28.42 UT: m1=12.7, Dia.=0.8’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma shows small stellar central condensation, m2 approximately 14.1. Opaque inner coma fades to edges, outer coma slightly elongated to ESE. Slight smoke haze and zodiacal light interference]
2016 Sep. 26.38 UT: m1=12.9, Dia.=0.9’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Small stellar central condensation visible, opaque inner coma fading to edges, slightly elongated to the ESE. Does not enhance in Swan Band filter, slight zodiacal light interference]
2016 Sep. 05.85 UT: m1=10.0, Dia.=2.5′, DC=3... 20-cm SCT (77x)... Juan José González (Nogarejas, alt. 920 m, León, España) [Altura sobre el horizonte: 10º. Cielo claro de montaña]
2016 Sep. 02.83 UT: m1=11.5, Dia.=2′, DC=3, no tail... 20-cm SCT (80x)... Carlos Labordena (Castellón, España)
2016 Aug. 31.79 UT: m1=13.4, Dia.=0.25′, DC=4... 60-cm L (305x)... Sandor Szabo (Hungary) [Just 8 degrees above horizont, inner coma is seen only]
2016 Aug. 29.86 UT: m1=10.7, Dia.=2.5′, DC=3/... 20-cm SCT (100x)... Juan José González (Pandorado, alt. 1190 m, León, España) [Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2016 Aug. 27.96 UT: m1=11.5, Dia.=2′, DC=4... 22-cm L (160x)... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 31.39 UT: m1=13.5, Dia.=0.5’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Stellar central condensation (m2 = 14.7), outer coma diffuse and small. Small tail visible 1’ in length in P.A. 122° approximately]
2016 July 28.40 UT: m1=13.7, Dia.=0.6’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Stellar central condensation, outer coma small, tail visible 1.5’in length in P.A. 122°. Slight zodiacal light interference]
2016 July 25.38 UT: m1=13.7, Dia.=0.9’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma shows a small semi-opaque outer coma, stellar central condensation with a small tail visible at x166 1.5’in length in P.A. 078°]
2016 July 03.46 UT: m1=13.7, Dia.=0.5’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter. Outer coma diffuse brightening to an opaque inner coma with a stellar central condensation. Pale aqua-blue in colour, no tail evident although at x166 the coma appears a little elongated to the NE]
2016 July 02.93 UT: m1=13.1, Dia.=0.6′, DC=5... 20-cm SCT (133x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa]
2016 July 02.38 UT: m1=13.4, Dia.=0.5’, DC=6... 25-cm L f:5 (83x)... Chris Wyatt (Walcha, NSW, Australia) [Coma shows a small stellar pseudo-nucleus surrounded by a tenuous, semi-transparent outer coma. Coma does not enhance in Swan Band filter. Close to mag 13.1 star, 0.9’away in P.A. 135° but easily resolvable from interference. Also visible at x39]
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