Comet 21P/Giacobini-Zinner
UserKoalin
User`s nameDarius Gasiūnas
Observation's time (UT)2018-07-31 21:00
ToolSky-Watcher 12 Inch Dobsonian Telescope
Observation's placeДеревня Dindos, Ignalinos район, Литва
Magnitude9.8
Comparison stars sourceTK - Tycho-2 Catalogue
MethodM - Morris`s method
Coma diameter(')1.3
Tail's length3'
Condensation6
Positional angle of tailNot set
Bortl's scaleNot set
Aperture30.5 cm
Focal length (mm)1500
Type of toolL - Newtonian reflector
Magnification123.3
Field of view (°)0.58
SQM-L in zenith
Light pollution zone
Lm
CommentMon 86% +8° Sun -14°
Morris Format2018 Jul 31.88 UT: m1=9.8, Dia.=1.3', DC=6, Tail: 3 arcmin ...30.5-cm L (123.3x) ...Darius Gasiūnas (Деревня Dindos, Ignalinos район, Литва, )