C/2013 N4 (Borisov)

C/2013 N4 (Borisov)
2014 Jan. 05.72 UT: m1=15.7: CCD, Dia.=&0.9′... [T9] 0.32-m f/7.4 Ritchey-Chretien + CCD... A. Novichonok & T. Prystavski (iTelescope observatory, Q62, remotely Siding Spring, Australia) [object USNOA2 0525-16053318 of 17m(Vis) very close to nucleus... diffuse faint coma]
2013 Dec. 07.19 UT: m1=12.1, Dia.=1.5′, DC=2... 25-cm L (125x)... Sandor Szabo (Hungary)
2013 Nov. 08.17 UT: m1=11.8, Dia.=1.6′, DC=1... 50.8-cm L (189x)... Sandor Szabo (Sieggraben, Austria)
2013 Oct. 29.17 UT: m1=10.5, Dia.=2.5′, DC=3... 25.0-cm L (77x)... Sandor Szabo (Boly, Hungary)
2013 Oct. 12.80 UT: m1=10.8, Dia.=1.3′, DC=3/... 40.0-cm L f/4.5 (144x)... Seiichi Yoshida (Gunma, Japan)
2013 Aug. 18.17 UT: m1=8.8, Dia.=6′, DC=2/... 20-cm SCT (77x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Significativamente más brillante que lo previsto. Coma amplia y difusa. Comienzo del crepúsculo astronómico. Altura sobre el horizonte: 9º. Cielo muy claro de montaña]
2013 Aug. 11.39 UT: m1=11.4, Dia.=2.5′, DC=2... 30.5-cm L (115x)... Todd Augustyniak (Coral Woods Conservation Area, Marengo, Illinois, USA) [Comet 8.4 degrees altitude... Sun -16.3 degrees altitude]
2013 Aug. 06.06 UT: m1=11.5, Dia.=0.6’, DC=3... 50.8-cm L (187x)... Sandor Szabo (Hungary) [Motion was checked]
2013 Aug. 04.38 UT: m1=11.2, Dia.=3.0′, DC=2... 30.5-cm L (115x)... Todd Augustyniak (Wildcat Mountain State Park, Ontario, Wisconsin, USA) [Comet 9 degrees altitude... Sun -17 degrees altitude. Immediately visible upon star hopping to comet’s position... diffuse with size]
2013 Aug. 03.36 UT: m1=10.8, Dia.=3.5′, DC=2... 37-cm L (142x)... Bob King (Duluth, Minnesota, USA) [Diffuse, “puffy” object with broad, brighter core. Comet 9 degrees high at start of morning twilight. Visible also in Swan Band filter but only a small improvement in contrast seen.]
2013 July 18.13 UT: m1=11.0, Dia.=3′, DC=2... 20-cm SCT (133x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Más brillante que lo previsto. La débil coma externa es difícil de observar con mayores aumentos. Movimiento seguido durante 30 minutos. Estrellas de campo comprobadas en el DSS y USNO A2.0. Algunas estrellas en la coma, la más brillante con mag 12.4 (GSC). Comienzo del crepúsculo astronómico. Altura sobre el horizonte: 13º. Cielo muy claro de montaña]
2013 July 17.35 UT: m1=12.9, Dia.=1.5′, DC=3... 37-cm L (242x)... Bob King (Duluth, Minn., USA) [It was very faint and diffuse and 13 degrees high at the start of morning twilight. Luckily no aurora in that direction to wash it out]