CometC/2015 V2 (Johnson)
UserSergey-B
User`s nameSergey Bezruchenko
Observation's time (UT)2017-04-18 12:20
ToolSW DOB 200/1000
Observation's placeс.Чугуевка
Magnitude8.9
Comparison stars sourceTK - Tycho-2 Catalogue
MethodM - Morris`s method
Coma diameter(')4
Tail's lengthNot set
Condensation5
Positional angle of tailNot set
Bortl's scaleNot set
Aperture20 cm
Focal length (mm)1000
Type of toolL - Newtonian reflector
Magnification58.8
Field of view (°)0.88
SQM-L in zenith
Light pollution zoneGreen
Lm5
Comment
Morris Format2017 Apr 18.51 UT: m1=8.9, Dia.=4', DC=5 ...20-cm L (58.8x) ...Sergey Bezruchenko (с.Чугуевка, Россия)