21p 20180812 pjordanov

21P/Giacobini–Zinner 12.08.2018 19h50 – 20h41 UT Bresser 150/750, Canon 100D, 51x60s, 1600ISO 2018 Aug 12.83 UT: m1=8.0, Dia.=6', DC=5 …15-cm L (28.8x) …P. Jordanov (Dimitrovgrad-Brod, Bulgaria) measurement on the image: coma – 7.5' tail length – 18' tail PA° = 250° Observer: Penko Jordanov

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