C/2017 M4 (ATLAS)

C/2017 M4 (ATLAS)
Reported observations:
2018 July 13.93 UT: m1=13.9, Dia.=0.5', DC=6, ... 60-cm L (188x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.51 UT: m1=13.6, Dia.=0.4', DC=6, ... 40.0-cm L f/4.5 (257x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 08.93 UT: m1=13.5, Dia.=0.7’, DC=6/, ... 35-cm L (200x) ... Gábor Sánta (Göd, county Pest, Hungary) [h= 74 deg., NELM= 5,8. Coma is very obvious, with 150x it is like a planetary nebula, with 200x it seems diffuse, and, with 275x, it is a very strongly condensed comet with exponential light profile, and, in the best seconds, a 16th-magnitude nucleus can be suspected. Very nice comet!]
2018 June 12.98 UT: m1=14.4, Dia.=--, DC=9, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain; Alt. 1190 m, 42º 47' N, 6º 00' W) [Quasi-stellar appearance. In-focus method. Comparison stars taken from Henden photometry near DQ Her. Field stars checked in DSS. Limiting star magnitude near comet: 14.7 (Henden). SQM: 21.6]
2018 Apr. 08.02 UT: m1=15.6 CCD, Dia.=0.37', DC=7/, ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2018 Apr. 09.07 UT: m1=16.2 CCD, Dia.=0.37', DC=8, ... 0.25-m f/4.7 reflector + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2018 Mar. 05.12 UT: m1=16.3 CCD, Dia.=0.17', DC=9, ... 0.20-m L f/4 + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
Advertisements