48P/Johnson

48P/Johnson
2018 July 14.00 UT: m1=13.7, Dia.=0.6', DC=4, ... 60-cm L (244x) ... Sandor Szabo (Sopron, Hungary)
2018 July 13.72 UT: m1=13.0; Dia.=1’, DC=5/, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, bright opaque centre, appears faintly stellar in periods of good seeing. Close to mag 13.9 star. Faint tail noticeable extending to WSW approximately. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 July 13.69 UT: m1=13.3, Dia.=0.5', DC=7, ... 40.0-cm L f/4.5 (144x) ... Seiichi Yoshida (Gunma, Japan)
2018 July 12.49 UT: m1=12.7, Dia.=1.2’, DC=3/, ... 25cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, moderately condensed. Observed from backyard location in town, slight smoke haze. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2018 July 11.74 UT: m1=13.5, Dia.=1.2’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre. Slight interference from proximity of mag 11.6 star. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 June 23.75 UT: m1=14.1, Dia.=0.7’, DC=6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Very faint stellar central condensation visible in good seeing. Diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 June 22.76 UT: m1=14.0, Dia.=1’, DC=6, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, centre opaque, faintly stellar in good seeing. NGC 7251 in same field and a little to the SW approximately. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 June 19.09 UT: m1=11.5, Dia.=4', DC=2, ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. APASScomparison stars. SQM 21.0. Altitude: 22 deg. From dark mountain skies the comet shows a large and very diffuse outer coma. Field stars checked in DSS]
2018 June 13.75 UT: m1=14.4, Dia.=1.1’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 June 12.73 UT: m1=14.6, Dia.=0.7’, DC=4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, visible in good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2018 June 11.73 UT: m1=14.6, Dia.=0.8’, DC=3/4, ... 25-cm L f:5 (83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult, coma diffuse with slight brightening to centre, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2011 Aug. 01.05 UT: m1=14.2, Dia.=0.6′, DC=6... 20-cm SCT (222x)... Juan José González (Alto del Castro – Aralla, alt. 1720 m., León, España) [Estrellas de campo comprobadas en el DSS. Estrellas de comparación de la fotometría Henden cerca de GRB030723. Cielo muy claro de montaña]
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