CometC/2015 V2 (Johnson)
Userantares48
User`s nameP. Jordanov
Observation's time (UT)2017-05-18 19:40
ToolBresser 150/750
Observation's placeDimitrovgrad-Brod
Magnitude7.9
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodS - Sidgwick`s method
Coma diameter(')7.42
Tail's lengthNot set
Condensation5
Positional angle of tailNot set
Bortl's scale5
Aperture15 cm
Focal length (mm)750
Type of toolL - Newtonian reflector
Magnification23.4
Field of view (°)2.22
SQM-L in zenith
Light pollution zoneGreen
Lm5.8
Comment
Morris Format2017 May 18.82 UT: m1=7.9, Dia.=7.42', DC=5 ...15-cm L (23.4x) ...P. Jordanov (Dimitrovgrad-Brod, Bulgaria)