Comet 21P/Giacobini-Zinner
UserAlexsandr Morozov
User`s nameAlexsandr Morozov
Observation's time (UT)2018-07-25 23:40
Toolтелескоп SW 10 dob
Observation's placeSukhinichi
Magnitude9.9
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodS - Sidgwick`s method
Coma diameter(')2.5
Tail's lengthNot set
Condensation5
Positional angle of tailNot set
Bortl's scaleNot set
Aperture25.4 cm
Focal length (mm)1200
Type of toolL - Newtonian reflector
Magnification48
Field of view (°)0.83
SQM-L in zenith
Light pollution zoneGreen
Lm5.96
Comment
Morris Format2018 Jul 25.99 UT: m1=9.9, Dia.=2.5', DC=5 ...25.4-cm L (48x) ...Alexsandr Morozov (Sukhinichi, Russia)