21p 20180811 pjordanov

21P/Giacobini–Zinner

11.08.2018 21h27 – 23h01 UT
Bresser 150/750, Canon 100D, 57x90s, 1600ISO

2018 Aug 12.01 UT: m1=8.5, Dia.=4', DC=6, Tail: 7 arcmin, in PA 250 deg …15-cm L (23.4x) …P. Jordanov (Belite Brezi, Bulgaria)

measurement on the image:
coma – 7.5'
tail length – 13.5'
tail PA° = 240°

Observer: Penko Jordanov