CometC/2013 US10 (Catalina)
UserCastor 98
User`s nameMarek Biely
Observation's time (UT)2016-01-23 04:35:00
Tool20x80 binoculars
Observation's placeBrno (244 m a.s.l.)
Magnitude6.4
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodM - Morris`s method
Coma diameter(')10.5
Tail's lengthNot set
Condensation4/
Positional angle of tailNot set
Bortl's scaleNot set
Aperture8 cm
Focal length (mm)Not set
Type of toolB - Binoculars
Magnification20
Field of view (°)2.5
SQM-L in zenith
Light pollution zone
Lm
CommentClear sky, very cold weather. Large, moderately condensed coma. No tails visible.
Morris Format2016 Jan 23.19 UT: m1=6.4, Dia.=10.5', DC=4.5 ...8-cm B (20x) ...Marek Biely (Brno (244 m a.s.l.), Czech Republic)