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* * * * * 237P/LINEAR * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2023 8 11.41 M 12.4:AQ 25.0L 125 0.9 4 WYA Walcha, NSW (Magnitude uncertain. Close to bright star.) 2023 8 7.95 S 12.2 AQ 20.3T 77 2 3/ GON Alto del Castro, León 2023 7 22.61 S 12.9 TA 40.0L 144 0.4 4 YOS Mt. Tsukuba, Ibaraki (Small.) 2023 7 22.49 M 12.3 AQ 25.0L 74 1.6 3/ WYA Walcha, NSW (Close to stars. Diffuse outer coma, opaque centre.) 2023 7 20.43 M 12.6 AQ 25.0L 125 1.3 4/ WYA Walcha, NSW (Diffuse. Opaque centre.) 2023 7 17.73 S 12.4 TA 40.0L 144 0.7 4 YOS Kita-karuizawa, Gunma 2023 7 16.71 S 13.0 TA 40.0L 144 0.7 5 YOS Kita-karuizawa, Gunma (Small but well visible.) 2023 7 14.43 M 12.2 AQ 40.0L 108 1.2 4/ WYA Walcha, NSW (Close to stars in busy starfield. Opaque inner coma, difficult due to faint stars in coma.) 2023 6 20.96 S 12.3 AQ 63.5L 127 1.5 6 SCH Tivoli, Namibia 2023 6 19.96 S 12.8 AQ 63.5L 127 1.3 7 SCH Tivoli, Namibia (Hint of a short tail [2’?] in p.s. 250 deg.) 2023 6 18.92 S 12.3 AQ 63.5L 127 1.2 6 SCH Tivoli, Namibia 2023 6 17.99 S 13.0:AQ 63.5L 127 1.5 4 SCH Tivoli, Namibia 2023 6 16.73 M 12.3 AQ 40.0L 59 2.2 5/ WYA Walcha, NSW (Diffuse. No enhancement in Swan Band filter.) 2023 6 14.994 S 12.2 AQ 25.4J 88 1.3 3 BOU Westerwijtwerd (Difficult observation. Twilight with Sun at -13.3 deg.) 2023 6 14.04 S 12.3 AQ 20.3T 133 3 3 GON Alto del Trichero, León 2023 3 30.67 M 14.1 AQ 40.0L 182 0.4 5 WYA Walcha, NSW (Small opaque centre.) 2023 3 18.69 M 13.9 AQ 40.0L 182 0.2 4/ WYA Walcha, NSW (Close to stars, diffuse coma, opaque centre.)
2016 11 16.76 S 9.8 TK 20.3T 77 3 2/ GON Gamoniteiro - Sierra del Aramo, Asturias (Astronomical twilight. Altitude 12°.) 2016 11 5.38 S 12.0 AU 40.0L 257 0.7 3 YOS Kita-karuizawa, Gunma (Hard to see due to the low sky condition and moonlight.) 2016 11 4.38 S[11.6 AU 40.0L 257 !0.8 YOS Kita-karuizawa, Gunma 2016 11 1.40 S 12.5 AQ 25.0L 83 1 3 WYA Walcha, NSW (Coma diffuse, slight brightening to centre.) 2016 10 31.41 S 12.3 AQ 25.0L 83 0.9 3 WYA Walcha, NSW (Coma diffuse, close to bright stars. Weakly condensed. Low altitude 15.4°.) 2016 10 26.78 S 9.5 TK 20.3T 77 6 2/ GON Pandorado, León (End of astronomical twilight. Altitude 11°.) 2016 10 25.39 S 12.5 AQ 25.0L 83 0.8 3 WYA Walcha, NSW (Coma very diffuse, weakly condensed centre, pale blue in colour. Does not enhance in Swan Band filter.) 2016 10 24.41 S 12.4 AQ 25.0L 83 0.8 3 WYA Walcha, NSW (Inner coma opaque and pale blue in colour, gradually fades to edges. Slight zodiacal light interference. Low altitude 18.2°.) 2016 10 23.40 S 12.3 AQ 25.0L 83 1.5 2/ WYA Walcha, NSW (Poor seeing. Coma showed an opaque and weakly condensed centre, pale blue in colour, fading to edges. No enhancement in Swan Band filter. Slight interference by zodiacal light.) 2016 10 20.41 S 12.4 AU 40.0L 257 0.6 5 YOS Kita-karuizawa, Gunma (Extremely low, [observed] just before it hides behind mountains. Background stars also look de-focussed, so DC is uncertain.) 2016 10 19.41 M 12.5 AQ 25.0L 83 1 4 WYA Walcha, NSW (Outer coma diffuse, inner coma moderately condensed and opaque, pale blue in colour. Does not enhance in Swan Band filter.) 2016 10 18.40 M 12.3 AQ 25.0L 83 0.5 4 WYA Walcha, NSW (Outer coma diffuse, brightening to an opaque, moderately condensed inner coma. Does not enhance in Swan Band filter. Slight interference from zodiacal light.) 2016 10 4.43 M 12.9 AQ 25.0L 83 0.9 4 WYA Walcha, NSW (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 10 2.81 S 9.6 TK 20.3T 77 6 2/ 0.5 70 GON Alto del Castro, León (Altitude 13°.) 2016 9 30.38 S 13.0 AQ 40.6L 165 1.0 5 CAM Warners Bay, NSW 2016 9 29.38 S 13.1 AQ 40.6L 165 1.0 5 CAM Warners Bay, NSW 2016 9 28.81 S 9.7 TK 20.3T 100 5 2/ 0.2 80 GON Alto del Castro, León (Altitude 13°.) 2016 9 28.42 M 12.7 AQ 25.0L 83 0.8 6 WYA Walcha, NSW (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 9 28.40 S 13.0 AQ 40.6L 165 0.9 3 CAM Warners Bay, NSW 2016 9 26.38 M 12.9 AQ 25.0L 83 0.9 6 WYA Walcha, NSW (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 9 19.40 S 13.0 AQ 40.6L 165 1.0 3 CAM Warners Bay, NSW 2016 9 6.37 S 12.0 AQ 40.6L 165 1.0 3 CAM Warners Bay, NSW 2016 9 5.85 S 10.0 TK 20.3T 77 2.5 3 GON Nogarejas, León (Altitude 10°.) 2016 8 29.86 S 10.7 TK 20.3T 100 2.5 3/ GON Pandorado, León (Altitude 11°.) 2016 8 27.96 S 11.5 AU 22.0L 160 2 4 GOI Araçatuba 2016 8 27.42 S 12.8 AQ 40.6L 165 0.5 5 CAM Warners Bay, NSW 2016 7 31.39 M 13.5 AQ 25.0L 83 0.5 6 1 m 122 WYA Walcha, NSW (Stellar central condensation [m2 = 14.7], outer coma diffuse and small.) 2016 7 28.40 M 13.7 AQ 25.0L 83 0.6 6 1.5m 122 WYA Walcha, NSW (Stellar central condensation, outer coma small. Slight zodiacal light interference.) 2016 7 25.38 M 13.7 AQ 25.0L 83 0.9 6 WYA Walcha, NSW (Coma shows a small semi-opaque outer coma. Stellar central condensation with a small tail visible at 166x 1.5’ in length in p.a. 78 deg.) 2016 7 3.46 M 13.7 AQ 25.0L 83 0.5 6 WYA Walcha, NSW (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 166x the coma appears a little elongated to the NE.) 2016 7 2.93 S 13.1 AQ 20.3T 133 0.6 5 GON Alto del Castro - Aralla, León 2016 7 2.38 M 13.4 AQ 25.0L 83 0.5 6 WYA Walcha, NSW (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, but easily resolvable from interference. Also visible at 39x.)