* * * * * 185P/Petriew * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2018 3 18.41 S 13.2 AQ 25.0L 83 1.2 2 WYA Walcha, NSW (Low altitude 15.8°. Poor seeing.) 2018 3 12.42 S 12.5:TA 40.0L 144 1.3 1 YOS Mt. Hanadate, Ibaraki (Hard to see because the background sky was very bright.) 2018 3 11.42 S 12.5 AQ 25.0L 83 1.4 3 WYA Walcha, NSW (Low altitude 13.0°. Does not enhance in Swan Band filter. Slight zodiacal light interference, poor seeing.) 2018 2 17.82 S 10.4 TK 20.3T 100 3 2/ GON Alto de la Garandilla - Escuredo, León (Altitude 24°. Zodiacal light.) 2018 2 13.785 S 11.7 AQ 25.4J 72 1.8 3 BOU Lauwersoog (Altitude 17.5°. Close to star of magn. 12.5.) 2018 2 10.42 S 11.7 AQ 25.0L 83 1.7 3 WYA Walcha, NSW (Low altitude 12.0°. Zodiacal light interference. Does not enhance in Swan Band filter. Opaque centre, weakly condensed.) 2018 2 7.42 S 11.7 AQ 25.0L 83 1.7 2/ WYA Walcha, NSW (Low altitude 10.1°. Coma diffuse with a slightly brighter but opaque centre.) 2018 2 6.762 S 11.7 AQ 25.4J 72 2.0 2/ BOU Lauwersoog (Altitude 19.4°. Close to star of magn. 12.3.) 2018 2 6.42 S 11.7 AQ 25.0L 83 2.2 3 WYA Walcha, NSW (Low altitude 10.0°. Zodiacal light interference. Does not enhance in Swan Band filter.) 2018 2 5.42 S 12.0 AQ 25.0L 83 1.8 3 WYA Walcha, NSW (Low altitude 11.2°. Does not enhance in Swan Band filter. Diffuse coma with slight brightening to centre. Faintly visible at 39x. Zodiacal light interference, end of nautical twilight.) 2018 1 17.81 S 10.7 TK 20.3T 100 2.5 3 GON Puerto de Aralla, León (Motion checked over a 30-min period. Field stars checked in DSS. Altitude 16°. Zodiacal light.)
2012 9 15.79 S 11.5 TA 40.0L 75 2.4 3 YOS Kita-karuizawa, Gunma (Diffuse, but bright.) 2012 8 22.15 S 9.7 TK 20.3T 77 5 2 GON Alto del Castro, León (Several stars in the coma, the brightest being mag. 12.0 [TK].} 2012 8 19.75 S 10.1 TJ 40.0L 75 3.6 4 YOS Kita-karuizawa, Gunma (11 years passed since my last observation at the discovery in 2001. Bright with somewhat weak condensation.) 2012 7 28.36 S 11.0 AU 22.0L 160 2 3 GOI Araçatuba 2012 7 24.028 S 11.6 TA 30.5T 95 1.3 3/ DIJ Burlage 2012 7 24.024 S 11.6 TA 30.5T 95 1.4 3 BOU Burlage, Germany 2012 7 23.13 S 10.4 TK 20.3T 77 3.5 2/ GON Alto del Castro, León (Better observing conditions from a higher mountain location allowed a brighter estimate than six days ago.) 2012 7 21.35 S 11.3 TK 22.0L 160 1.5 4 GOI Araçatuba 2012 7 17.13 S 11.0 TK 20.3T 100 2.5 2 GON Pandorado, León
2007 3 16.85 S 11.0 TK 20.3T 77 2 4 GON Puerto de Aralla, León (Mountain location, clear sky. Zodiacal light. Altitude: 8 deg.) 2007 3 12.801 S 10.9 AU 31.0J 89 2.0 3 DIJ Lauwersoog 2007 3 12.798 S 11.0 AU 31.0J 89 1.5 3 BOU Lauwersoog 2007 3 11.793 S 11.1 AU 31.0J 89 1.5 3 BOU Lauwersoog 2007 3 10.83 S 11.2 TK 20.3T 100 2.0 4 GON Puerto de Aralla, León (Mountain location, very clear sky. Zodiacal light. Altitude: 12 deg.) 2007 2 14.80 S 11.7 TK 20.3T 100 1.2 4 GON Collada de la Cobertoria, Asturias (Mountain location, very clear sky. Zodiacal light. Altitude: 10 deg.) 2007 2 12.80 S 11.8 TK 20.3T 133 1.2 4 GON Caña Valles - Macizo Occidental - Picos de Europa, Asturias
2001 10 14.77 S 12.5 HS 27.5T 88 1.3 3 MAT Wallaroo, SA 2001 9 29.156 S 11.0:TJ 25.4J 88 & 2 3 BOU Sint Annen (Comet close to star of magnitude 10.) 2001 9 27.80 S 10.8:TJ 20.0L 45 1.5 4 MAT Wallaroo, SA 2001 9 26.76 S 10.7 GA 25.4L 71 4 2 SEA Cowra, NSW (Rather low surface brightness, but enhanced using Swan Band filter.) 2001 9 5.79 S 10.2 GA 25.4L 71 2 SEA Cowra, NSW (Bright moonlight. Comet was a little enhanced using Swan Band filter.) 2001 9 1.108 S 10.5 TJ 25.4J 88 2.2 3/ BOU Sint Annen (Some interference from Jupiter, only 20' away.) 2001 8 29.106 S 10.1 AC 30.5T 54 & 3 3 COM Roden 2001 8 29.100 S 10.2 TJ 31.0J 72 2.8 3/ DIJ Sint Annen 2001 8 29.097 S 10.4 TJ 31.0J 72 2.6 3/ BOU Sint Annen 2001 8 23.83 S 10.7 TJ 20.0L 45 2.0 3 MAT Wallaroo, SA (20 deg altitude, slightly condensed.) 2001 8 21.070 S 10.4 TJ 30.1J 72 & 2 4 DIJ Sint Annen 2001 8 21.067 S 10.5:TJ 31.0J 72 &2.5 4 BOU Sint Annen (Variable conditions with fog forming and disappearing. Moreover, comet close to star of GSC-magn. 10.7.) 2001 8 20.086 S 10.4 TJ 25.4J 58 2.4 3/ BOU Sint Annen (Easy object. Some interference from star of GSC-magn. 11.7 at edge of coma.)