Observation's detail view

Comet9P/Tempel
Userizack
User`s name
Observation's time (UT)2016-03-30 21:30
ToolLightBridge 12" f/5 Truss-Tube Dobsonian
Observation's placePhilo - California
Comparison stars sourceTK - Tycho-2 Catalogue
MethodS - Sidgwick`s method
Magnitude[13.6
Coma diameter(')
Tail's lengthNot set
CondensationNot set
Positional angle of tailNot set
Bortl's scale2
Aperture12
Focal length (mm)1524
Type of toolL - Newtonian reflector
Magnification101.6
Field of view (°)0.98
SQM-L in zenith
Light pollution zoneGray
Lm7.5
CommentThis was a real stretch to see anything, there was a very very faint smudge, perhaps with diffusion of 1, my best comparison was from two stars of 14.00 and 13.25 mag respectively. Sky was crisp cool with 80% humidity, viz: 8
Morris Format2016 Mar 30.9 UT: m1=[13.6 ...12-cm L (101.6x) ...Isaac Devenny (Philo - California, USA)