CometC/2017 T2 (PANSTARRS)
Userjeff42
User`s namej-philippe remillieux
Observation's time (UT)2019-12-30 23:00
ToolDobonian Telescope
Observation's placeparc naturel régional du pilat
Magnitude10.8
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodM - Morris`s method
Coma diameter(')2
Tail's lengthNot set
Condensation
Positional angle of tailNot set
Bortl's scaleNot set
Aperture250 mm
Focal length (mm)1200
Type of toolL - Newtonian reflector
Magnification68.6
Field of view (°)1.09
SQM-L in zenith
Light pollution zoneYellow
Lm
Comment
Morris Format2019 Dec 30.96 UT: m1=10.8, Dia.=2' ...250-cm L (68.6x) ...j-philippe remillieux (parc naturel régional du pilat, france)