* * * * * C/2011 F1 (LINEAR) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2012 11 4.78 S 9.0 TK 20.3T 100 5 3 GON Collada del Fresno - Sierra del Aramo, Asturias (Altitude: 6°. Mountain location, very clear sky.) 2012 10 9.77 V 12.5 TK 10.9R 1.4 359 QVA Borrevannet, Horten (Click here for an [unfiltered] image of this comet.) 2012 10 5.81 S 9.3 TK 20.3T 77 7 2/ GON Ranedo de Curueño, León (Altitude: 17°. Mountain location, very clear sky.) 2012 10 2.77 V 13.4 TK 10.9R 0.8 QVA Borrevannet, Horten (Moonlight.) 2012 9 19.81 V 13.3 TK 10.9R 1.2 QVA Borrevannet, Horten (Altitude 16°.) 2012 9 13.86 S 9.8 TK 20.3T 77 6 2/ GON Alto del Castro, León (Elongated coma.) 2012 9 9.837 S 11.4 AQ 15.5L 58 1.2 6 BOU Burlage, Germany 2012 9 9.836 S 11.5 AQ 15.5L 58 1.5 4/ DIJ Burlage 2012 9 7.94 S 10.5 TK 22.0L 160 3 2/ GOI Araçatuba 2012 9 6.85 S 10.4 TK 20.3T 100 6 3 GON Llamas de Rueda, León 2012 8 21.91 S 10.8 TK 20.3T 100 3.5 3 GON Alto del Castro, León (Magn. 11.4 [TK] star in coma.) 2012 8 19.86 M 11.3 TK 20.3L 63 1.5 4 GUZ Szklary 2012 8 18.46 S 10.6 TJ 40.0L 75 2.4 3 YOS Kita-karuizawa, Gunma (Cloudy, but the small area of the sky was fine around the Big Dipper and Bootes. Somewhat diffuse with weak condensation.) 2012 8 9.94 S 11.0 TK 20.3T 77 3.5 3 GON Alto del Castro, León (Mag. 12.4 [GSC] star in coma.) 2012 8 4.94 S 10.8 TK 22.0L 120 2.5 2 GOI Araçatuba 2012 7 25.956 S 12.4 TA 30.5T 95 1.5 3 BOU Burlage, Germany 2012 7 25.953 S 12.0 TA 30.5T 95 1.8 3/ DIJ Burlage 2012 7 25.35 S 13.0 AQ 25.0L 83 1 2 WYA Walcha, NSW (No tail, difficult to see in moonlight, averted vision.) 2012 7 23.944 S 12.5 TA 30.5T 95 2.0 4 DIJ Burlage 2012 7 23.940 S 12.3 TA 30.5T 95 1.2 4/ BOU Burlage, Germany 2012 7 23.89 M 11.8 TK 20.3L 63 1.5 3 GUZ Szklary 2012 7 23.01 S 10.8 TK 20.3T 100 5 2/ GON Alto del Castro, León 2012 7 20.94 S 11.0 TK 22.0L 120 2 2 GOI Araçatuba 2012 7 20.37 S 12.4 TA 25.0L 39 2 3/ WYA Walcha, NSW (Coma appears round in shape, uniformly diffuse for much of its diameter with thinly veiled edges and a smaller, slightly brighter central condensation. Slight haze in atmosphere from dissipating clouds present at time of obs.) 2012 7 16.99 S 11.1 TK 20.3T 77 5 3/ GON Pandorado, León 2012 7 16.89 S 12.7 UD 25.4L 120 0.7 2 IVA Melovoe 2012 7 16.36 S 11.9 TA 25.0L 83 1.5 2 WYA Walcha, NSW (No tail, coma has broad, even brightness with faint edges, averted vision.) 2012 7 15.89 S 12.5 UD 20.3L 120 1.0 3 IVA Atamanovka 2012 7 15.36 S 12.3 TA 25.0L 83 1.2 2/ WYA Walcha, NSW (No tail, averted vision, slight haze in the atmosphere at the time of observation.) 2012 7 13.00 S 11.2 TK 20.3T 100 4.5 3/ GON Pandorado, León 2012 7 5.94 S 11.1 TK 22.0L 160 2 2 GOI Araçatuba 2012 6 24.45 S 11.2 AQ 25.0L 83 1.2 2 WYA Walcha, NSW 2012 6 23.40 S 12.5 AQ 25.0L 39 1.3 2/ WYA Walcha, NSW (No tail, coma diffuse, slightly brighter central condensation than the edges, averted vision, slight moonlight interference.) 2012 6 19.42 S 11.5 AQ 25.0L 83 1.4 3 WYA Walcha, NSW (No tail, observation made difficult due to nearby bright star, best visible in periods of good seeing using averted vision.) 2012 6 18.37 S 11.5 AQ 25.0L 83 1.2 1 WYA Walcha, NSW 2012 6 15.39 S 11.4 AQ 25.0L 83 1 2/ WYA Walcha, NSW (Coma small and diffuse, no tail.) 2012 6 14.37 S 11.5 AQ 25.0L 83 0.8 3 WYA Walcha, NSW (Comet low on Northern horizon, averted vision, difficult, visible in periods of good seeing.) 2012 6 14.05 S 10.7 TK 20.3T 77 6 2/ GON Alto del Castro, León (Diffuse wide coma.) 2012 5 26.977 S 12.8 AQ 30.5T 95 1.2 4 DIJ Burlage 2012 5 26.974 S 12.7 AQ 30.5T 95 1.0 5 BOU Burlage, Germany 2012 5 24.965 S 12.9 AQ 30.5T 95 1.0 3/ DIJ Burlage 2012 5 24.961 S 12.9 AQ 30.5T 95 1.0 5/ BOU Burlage, Germany 2012 5 16.990 S 12.9 AQ 30.5T 95 1.2 4 DIJ Burlage 2012 5 16.987 M 12.9 AQ 30.5T 95 1.0 5/ BOU Burlage, Germany 2012 5 14.98 S 11.1 TK 20.3T 77 5 3 GON Pandorado, León (Observation made from a higher mountain location, providing a wider coma diameter and brighter m1 estimate, in comparison with my previous May 9.96 data. Several stars inside the coma, the brightest being mag. 13.6 [GSC].) 2012 5 12.992 M 12.7 AQ 30.5T 95 0.9 6 BOU Burlage, Germany 2012 5 12.990 S 12.7 AQ 30.5T 95 1.0 4 DIJ Burlage 2012 5 12.93 S 12.3 UD 25.4L 60 1.0 3 IVA Melovoe 2012 5 9.96 S 11.5 TK 20.3T 77 2.5 3/ GON El Fito - Sierra del Sueve, Asturias (Observation made from a lower location, providing a narrower coma diameter and dimmer m1 estimate, in comparison with my previous Apr. 8.87 data.) 2012 4 24.85 S 13.3 UD 25.4L 120 1.0 5 IVA Melovoe 2012 4 15.949 S 13.3 AQ 30.5T 95 0.7 6 DIJ Burlage 2012 4 15.947 M 13.2 AQ 30.5T 95 0.8 6 BOU Burlage, Germany 2012 4 13.90 S 13.8 UD 25.4L 170 0.7 5 IVA Melovoe 2012 4 8.87 S 11.2 TK 20.3T 77 6 2/ GON Pandorado, León (From dark mountain skies the coma appears large and diffuse, with faint outer region. Several stars inside the coma, the brightest being mag. 13.7 [GSC].) 2012 3 28.11 S 11.7 TK 20.3T 100 2.5 4 GON Alto del Castro - Aralla, León 2012 3 22.958 S 13.4 AQ 30.5T 117 0.7 4 DIJ Burlage 2012 3 22.955 S 13.3 AQ 30.5T 117 0.7 4/ BOU Burlage, Germany 2012 3 19.942 S 13.2 AQ 30.5T 117 0.9 3/ BOU Burlage, Germany 2012 3 19.939 S 13.2 AQ 30.5T 117 1.0 3/ DIJ Burlage 2012 3 15.06 S 11.5 TK 20.3T 100 3 3 GON Alto del Castro - Aralla, León (Significantly brighter than expected. Nearby field stars checked in DSS. Mountain location, very clear sky.) 2012 1 28.07 V 14.5 UD 6.7R NOV Nizhniy Arkhyz (remotely) 2012 1 21.01 V 14.4 UD 6.7R NOV Nizhniy Arkhyz (remotely) 2012 1 3.17 S 13.7 HN 20.3T 133 0.5 6 GON Alto del Castro - Aralla, León (Nearby field stars checked in DSS. Comparison stars taken from Henden photometry - HS550 field. Mountain location, very clear sky.)