Comet17P/Holmes
UserNorm
User`s nameNeil Norman
Observation's time (UT)2008-02-11 00:14:00
ToolNaked eye
Observation's placeIpswich
Magnitude3.8
Comparison stars sourceAE - Planetary magnitudes from the American Ephemeris and Nautical Almanac
Method
Coma diameter(')70
Tail's lengthNot set
Condensation2
Positional angle of tailNot set
Bortl's scaleNot set
Aperture cm
Focal length (mm)Not set
Type of toolE - Naked eye
MagnificationNot set
Field of view (°)Not set
SQM-L in zenith
Light pollution zone
Lm6
Comment
Morris Format2008 Feb 11.01 UT: m1=3.8, Dia.=70', DC=2...Naked Eye ...Neil Norman (Ipswich, England)