Comet 21P/Giacobini-Zinner
UserPeter_Pskov
User`s namePetr Mitrofanov
Observation's time (UT)2018-08-12 22:35
ToolBresser 20x80
Observation's placePusgory
Magnitude7.8
Comparison stars sourceTK - Tycho-2 Catalogue
MethodM - Morris`s method
Coma diameter(')5
Tail's length16'
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 zoneBlue
Lm
Comment
Morris Format2018 Aug 12.94 UT: m1=7.8, Dia.=5', DC=4, Tail: 16 arcmin ...8-cm B (20x) ...Petr Mitrofanov (Pusgory, Russia)