Comet 21P/Giacobini-Zinner
UserPeter_Pskov
User`s namePetr Mitrofanov
Observation's time (UT)2018-09-19 00:50
ToolBresser 20x80
Observation's placeCherniakovitsi
Magnitude7.7
Comparison stars sourceTK - Tycho-2 Catalogue
MethodM - Morris`s method
Coma diameter(')5
Tail's length14'
Condensation4
Positional angle of tailNot set
Bortl's scaleNot set
Aperture8 cm
Focal length (mm)Not set
Type of toolB - Binoculars
Magnification20
Field of view (°)3.2
SQM-L in zenith
Light pollution zoneGreen
Lm
Comment
Morris Format2018 Sep 19.03 UT: m1=7.7, Dia.=5', DC=4, Tail: 14 arcmin ...8-cm B (20x) ...Petr Mitrofanov (Cherniakovitsi, Russia)