Comet 21P/Giacobini-Zinner
UserArtom
User`s nameArtyom Novichonok
Observation's time (UT)2018-08-17 21:50:00
ToolSW 8''
Observation's placeFedotovo, Karelia
Magnitude8.1
Comparison stars sourceTK - Tycho-2 Catalogue
MethodM - Morris`s method
Coma diameter(')6
Tail's length10'
Condensations5
Positional angle of tail260
Bortl's scale2.5
Aperture20 cm
Focal length (mm)1000
Type of toolL - Newtonian reflector
Magnification31.3
Field of view (°)0
SQM-L in zenith20.85
Light pollution zoneGray
Lm
Comment16 C; astronomical twilight (Sun -14.1)
Morris Format2018 Aug 17.91 UT: m1=8.1, Dia.=6', DC=5, Tail: 10 arcmin, in PA 260 deg ...20-cm L (31.3x) ...Artyom Novichonok (Fedotovo, Karelia, Russia)