C/2015 C2 (SWAN)

C/2015 C2 (SWAN)
Reported observations:
2015 July 12.87 UT: m1=17.0: CCD, Dia.=0.4′... [T16] 0.15-m f/7.3 refractor + CCD... A. Novichonok & T. Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)
2015 May  25.84 UT: m1=14.4 CCD + R filter, Dia.=38″, DC=5S, Tail=48″ in PA: 240-319 deg ... 70-cm f/4 L + CCD... Alexander Baransky (Kyiv comet station MPC 585, Ukraine) [Star-like inner coma, short parabolic tail]
2015 May  19.02 UT: m1=[11.8, Dia.=1.4′, NEGATIVE ... 7.6-cm L f/4 (38x)... Marek Biely (Brno, Czech Republic) [Definitely not visible. Fainter than 11.8 mag.]
2015 May  16.11 UT: m1=11.8, Dia.=1.2′, DC=3... 20-cm SCT (133x)... Juan José González (Cueto Rosales, alt. 1420 m, León, España)
2015 May  01.77 UT: m1=11.0:, Dia.=1.0′, DC=2... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan)
2015 Apr. 25.08 UT: m1=[11.4, Dia.=1.8′, NEGATIVE (!)... 7.6-cm L f/4 (38x)... Marek Biely (Brno, Czech Republic) [Already not visible. Fainter than 11.4 mag. Slight interference of astronomical twilight]
2015 Apr. 22.08 UT: m1=10.7:, Dia.=&1.5′, DC=3/... 7.6-cm L f/4 (38x)... Marek Biely (Brno, Czech Republic) [Low altitude: 11.2 deg. above the horizon. The comet was very faintly visible only thanks to clear sky. Limit observation. Slight interference of astronomical twilight]
2015 Mar. 18.76 UT: m1=9.5, Dia.=1.2′, DC=3... 50.8-cm L (189x)... Sandor Szabo (Sopron, Hungary)
2015 Mar. 09.82 UT: m1=9.2, Dia.=3′, DC=2/... 20-cm SCT (100x)... Juan José González (Camposagrado, alt.1190 m, León, España) [Más brillante que lo esperado. Condensación central casi estelar, con m2=12.0 aproximada (fotometría APASS cercana al cometa). Estrellas de campo comprobadas en el DSS. Altura sobre el horizonte: 7º. Crepúsculo astronómico. Luz zodiacal. Cielo muy claro de montaña]