* * * * * 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 18.85   S 12.6 HS  40.7L  72  1.5  3            BIV
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 14.85   S 12.3 HS  40.7L  72  2.0  2            BIV
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