21p 20180813 pjordanov

21P/Giacobini–Zinner 13.08.2018 ?. 21h16 – 22h06 UT Bresser 150/750, Canon 100D, 50x60s, 1600ISO 2018 Aug 13.88 UT: m1=7.6, Dia.=5.5', DC=6, Tail: 7 arcmin, in PA 230 deg …15-cm L (28.8x) …P. Jordanov (Dimitrovgrad-Brod, Bulgaria) measurement on the image: coma – 6' tail length – 16' tail PA° = 250° Observer: Penko Jordanov

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