21p 20180818 pjordanov

21P/Giacobini–Zinner and open cluster Trumpler 3 18.08.2018 ?. 21h26 – 22h32 UT Bresser 150/750, Canon 100D, 64x60s, 1600ISO 2018 Aug 18.86 UT: m1=7.4, Dia.=3', DC=5 …15-cm L (28.8x) …P. Jordanov (Sarnegor, Bulgaria) Measurement on the image: coma – 7' tail length – 23.5' tail PA° = 260° Observer: Penko Jordanov

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