* * * * * C/2015 F3 (SWAN) * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2015 5 1.75 S 12.7 TJ 40.0L 144 1.4 2 YOS Kita-karuizawa, Gunma (Tiny and diffuse. The full moon was about to set under the horizon, so the influence was less.) 2015 4 20.90 S 10.5 TK 20.3T 77 3.5 1 GON Villasecino, León 2015 4 19.899 S 12.1 AQ 30.5T 54 3.8 0 DIJ Burlage 2015 4 19.897 S 11.9 AQ 30.5T 54 3.4 0/ BOU Burlage, Germany 2015 4 17.95 S 10.2 TK 20.0L 42 & 3 1 SCH Eerbeek 2015 4 17.884 S 11.8 AQ 25.4J 72 2.5 0/ BOU Sint Annen 2015 4 17.870 S 11.4 AQ 15.5L 42 2.5 1 DIJ Burlage 2015 4 16.913 S 11.6 AQ 15.5L 42 2.0 0/ DIJ Burlage 2015 4 16.890 S 11.6 AQ 25.4J 72 2.5 1 BOU Sint Annen 2015 4 15.086 S 11.3 AQ 25.4J 58 3 1/ BOU Sint Annen (Despite excellent sky difficult object, faint and very diffuse.) 2015 4 13.854 S 10.8 AQ 15.5L 42 2.0 2 DIJ Burlage 2015 4 7.90 S 9.5 TK 20.3T 77 5 2 GON Alto del Cellerón - Camposagrado, León (The coma appears more diffuse and wider than shown in my previous observation, providing a brighter estimate. Mountain location, very clear sky.) 2015 4 6.848 S 10.8 AQ 25.4J 72 2.3 2 BOU Sint Annen (Star of magn. 11.6 [AQ] near edge of coma.) 2015 3 28.17 S 10.1 TK 20.3T 77 4 3 GON Alto de la Camperona - Sotillos de Sabero, León (Nearby field stars checked in DSS. Coma elongated in p.a. 0 deg. Rapid motion checked during a 30-min period. Altitude 16°. Mountain location, very clear sky.) 2015 3 28.16 S 10.0 TK 10.0B 25 3 3/ GON Alto de la Camperona - Sotillos de Sabero, León 2015 3 28.133 S 10.6 AQ 25.4J 72 2.4 2/ BOU Sint Annen