Comet 21P/Giacobini-Zinner
UserAlexsandr Morozov
User`s nameAlexsandr Morozov
Observation's time (UT)2018-07-09 21:45
Toolтелескоп SW 10 dob
Observation's placeNovozybkov
Magnitude10.4
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodS - Sidgwick`s method
Coma diameter(')1.5
Tail's length2'
Condensation4/
Positional angle of tail220
Bortl's scaleNot set
Aperture25.4 cm
Focal length (mm)1200
Type of toolL - Newtonian reflector
Magnification120
Field of view (°)0.42
SQM-L in zenith
Light pollution zoneGreen
Lm
Comment
Morris Format2018 Jul 9.91 UT: m1=10.4, Dia.=1.5', DC=4.5, Tail: 2 arcmin, in PA 220 deg ...25.4-cm L (120x) ...Alexsandr Morozov (Novozybkov, Russia)