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Messier M46

Object Information
Messier object: M46
NGC (New General Catalog) number: NGC 2437
Discription: Open Cluster
Located in constellation: Puppis
Right ascension in hours minutes: 7:41.8
Declination in degrees minutes: -14:49
Visual magnitude: 6
Size: 27.0 arc minutes
Image size: 55.23 arc minutes high by 40.98 arc minutes wide
Image orientation: North is top, East is left
Detailed discription of M46 in SEDS Messier database
Other Messier galleries, images or catalogs

Observing Log
Date of observation: February 19, 1999
Time at end of first CCD image 21:32 PST
Time at end of last CCD image 21:47 PST
Observing Location: At home on the drive way
Observation of object: M46 is a large irregularly open cluster with a lots of stars. NGC 2438 planetary nebula is located in the northern part of M46.
 
Sky Conditions
Sky transparency: 4.2 (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon set at 22:02 PST on February 19, 1999
Astronomical twilight ends in the evening at 19:22 PST on February 19, 1999
Astronomical twilight starts in morning at 5:24 PST on February 20, 1999
 
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 8 - 120 seconds images added together
CCD dark calibration frames: 9 - 120 seconds dark frames

© 1998-2003 David Haworth