64P/Swift-Gehrels

64P/Swift-Gehrels
Reported observations:
2018 Sep. 19.16 UT: m1=12.2, Dia.=1.5', DC=4, ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55' N, 5º 50' W) [Brighter inner coma diameter: 1.5', providing m=12.2 (AQ). Very faint and diffuse outer coma diameter: 5', providing m=10.8:(TK). Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Sep. 18.71 UT: m1=13.1, Dia.=1.3’, DC=4, ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 19.6°; Diffuse coma with moderately condensed centre. Sky slightly hazy due to dust. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2018 Sep. 17.67 UT: m1=12.2, Dia.=1.6', DC=5, ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.68 UT: m1=13.2, Dia.=0.8', DC=6, ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 15.04 UT: m1=14.9 CCD, Dia.=0.50', DC=7/, ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Sep. 10.00 UT: m1=12.5, Dia.=1.1', DC=4, ... 20-cm SCT(100x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55' N, 5º 50' W) [Brighter inner coma diameter : 1.1', providing m=12.5 (AQ). Very faint and diffuse outer coma diameter : 3', providing m=11.2:(AQ). Sidgwick method. APASS comparison stars. SQM: 21.5]
2018 Sep. 09.73 UT: m1=13.6, Dia.=1’, DC=3, ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult; Very diffuse. Transparent coma, slightly brighter centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 01.89 UT: m1=11.0:, Dia.=6', DC=1, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [In evolution after the recent outburst. Inner coma magnitude was difficult to estimate due to close mag. 13.9 (APASS) star. Faint and diffuse outer coma diameter: 6', providing m=11.0: (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2018 Sep. 01.83 UT: m1=15.7 CCD, Dia.=0.22', DC=8, ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory C36, Belarus)
2018 Aug. 31.84 UT: m1=15.7 CCD, Dia.=0.28', DC=7, ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Belarus)
2018 Aug. 20.06 UT: m1=13.1, Dia.=1.1', DC=4, ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [In evolution after the recent outburst. Brighter inner coma diameter: 1.1', providing m=13.1 (APASS). Very faint and diffuse outer coma diameter: 7', providing m=10.7: (Tycho). Sidgwick method. SQM: 21.5]
2018 Aug. 18.25 UT: m1=13.1:, Dia.=1.25', DC=3, ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [averted vision]
2018 Aug. 17.91 UT: m1=16.8 CCD, Dia.=0.33', DC=7/, ... 0.20-m f/4 Schmidt-Newton + CCD ... Serguey Shurpakov (Observatory A98, Baran', Belarus)
2018 Aug. 16.96 UT: m1=16.4 CCD, Dia.=0.17', DC=7/, ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran', Belarus)
2018 Aug. 15.93 UT: m1=14.3, Dia.=0.7', DC=2, ... 60-cm L(305x) ... Sandor Szabo (Sopron, Hungary)
2018 Aug. 15.73 UT: m1=13.0, Dia.=1’, DC=2/, ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, opaque across coma, slightly brighter at centre. Post-outburst. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Aug. 15.23 UT: m1=14.0, Dia.=0.7’, DC=3, ... 41-cm L(229x) ... Alan Hale (Cloudcroft, New Mexic, USA)
2018 Aug. 14.95 UT: m1=13.2, Dia.=0.6', DC=7, ... 20-cm SCT(200x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [In outburst. Inner coma diameter: 0.6', surrounded by very faint outer coma. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Aug. 06.01 UT: m1=17.1 CCD, Dia.=0.26', DC=8, ... 0.25-m f/4.7 Newton + CCD ... Serguey Shurpakov (Observatory С36, Baran', Belarus)
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