CometC/2017 O1 (ASASSN)
UserNorm
User`s nameNeil Norman
Observation's time (UT)2017-09-21 22:47:00
ToolBinoculars
Observation's placeIpswich
Magnitude8.9
Comparison stars sourceHJ - Magnitudes in the Hipparcos photometric system
MethodS - Sidgwick`s method
Coma diameter(')7
Tail's lengthNot set
Condensation3
Positional angle of tailNot set
Bortl's scaleNot set
Aperture80 mm
Focal length (mm)Not set
Type of toolB - Binoculars
Magnification20
Field of view (°)3.8
SQM-L in zenith
Light pollution zone
Lm6
Comment
Morris Format2017 Sep 21.95 UT: m1=8.9, Dia.=7', DC=3 ...80-cm B (20x) ...Neil Norman (Ipswich, England)