C/2015 O1 (PANSTARRS)

C/2015 O1 (PANSTARRS)
Reported observations:
2018 July 13.89 UT: m1=13.5, Dia.=1.3', DC=4, .... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.49 UT: m1=12.8, Dia.=1.0', DC=4, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 08.90 UT: m1=13.3, Dia.=0.7’, DC=2, ... 35-cm L (200x) ... Gábor Sánta (Göd, county Pest, Hungary) [h=29 deg., NELM= 4,0]
2018 May  15.99 UT: m1=12.0, Dia.=1.2', DC=5, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain; Alt. 1190 m, 42º 47' N, 6º 00' W) [Sidgwick method. APASS comparison stars. SQM: 21.7]
2018 May  08.96 UT: m1=12.2, Dia.=1.2', DC=5, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Pandorado, Leon, Spain; Alt. 1190 m, 42º 47' N, 6º 00' W) [Sidgwick method. APASS comparison stars. SQM: 21.6]
2018 May  04.94 UT: m1=12.2, Dia.=1.0', DC=4, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 May  04.50 UT: m1=13.1, Dia.=1.2', DC=5, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 May  03.53 UT: m1=13.5, Dia.=0.8', DC=4/, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Apr. 19.85 UT: m1=12.8, Dia.=1.5', DC=5, ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 18.91 UT: m1=12.3, Dia.=1.0', DC=4, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54' N, 5º 49' W) [Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Apr. 18.85 UT: m1=12.8, Dia.=1.6', DC=5, ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 17.85 UT: m1=12.7, Dia.=1.5', DC=4/, ... 20-cm L f:4 (106x) ... Martin Lehky (Hradec Králové, Czech Republic)
2018 Apr. 06.93 UT: m1=13.3, Dia.=0.9', DC=5, ... 60-cm reflector (187x) ... Sandor Szabo (Sopron, Hungary)
2018 Apr. 05.89 UT: m1=12.2, Dia.=1.5', DC=3/, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Trichero - Soto y Amio, Leon, Spain; Alt. 1190 m, 42º 46' N, 5º 53' W) [Sidgwick method. APASS comparison stars. SQM: 21.4]
2018 Mar. 24.74 UT: m1=13.5, Dia.=1.2’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.6°; Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2018 Mar. 12.80 UT: m1=12.8, Dia.=1.4', DC=3, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Ibaraki, Japan)
2018 Mar. 05.03 UT: m1=13.6 CCD, Dia.=0.66', DC=6/, ... 0.20-m L f/4 + CCD ... Sergey Shurpakov (Observatory C36, Baran', Belarus)
2018 Jan. 18.21 UT: m1=12.8, Dia.=1.2', DC=5, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º 48' W) [Sidgwick method. APASS comparison stars. SQM: 21.3. Central condensation, m2=14.2: (APASS). Field stars checked in DSS]
2017 Sep. 22.79 UT: m1=14.2, Dia.=0.3’, DC=5, ... 60-cm reflector (244x) ... Sandor Szabo (Sopron, Hungary)
2017 Aug. 21.86 UT: m1=14.0 DSRL, Dia.=0.89', ... 5-cm A + DSLR V f/4 ... Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2017 Aug. 21.85 UT: m1=14.3, Dia.=0.4', DC=2/, ... 0.35-m L (351x) ... Gabor Santa (Hungary) [Coma is next to a 14.5 mag star, but very obvious. Moving was detected in a half an hour period]
2017 Aug. 14.47 UT: m1=14.1, Dia.=0.4’, DC=3, ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 10.38 UT: m1=14.3, Dia.=0.8’, DC=3, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 14.96 UT: m1=14.5, Dia.=0.2', DC=7, ... 20-cm SCT (133x) ... Juan Jose Gonzalez (Alto del Castro - Aralla, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [In-focus method. APASS comparison stars. SQM: 21.6]
2017 June 30.62 UT: m1=14.7, Dia.=0.2’, DC=5/6, ... 25-cm L f:5 (166x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very small, just visible near mag 13.3 star. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 17.93 UT: m1=14.9 CCD, Dia.=0.26', DC=8/, Tail=0.8' in PA: 120 deg., ... 25-cm reflector f/4.7 ... Sergey Shurpakov (Baran’, Belarus) 
2017 May 26.95 UT: m1=14.8 CCD, Dia.=0.35', DC=8, ... 25-cm reflector f/4.7 ... Sergey Shurpakov (Baran’, Belarus)
2016 Aug. 31.85 UT: m1=16.2, Dia.=0.1′, DC=5... 60-cm L (518x)... Sandor Szabo (Hungary) [Motion was cheched during 20 minutes period]
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