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