Messier M3


Object Information
Messier object: M3
NGC (New General Catalog) number: NGC 5272
Discription: Globular Cluster
Located in constellation: Canes Venaciti
Right ascension in hours minutes: 13:42.2
Declination in degrees minutes: 28:23
Visual magnitude: 6.2
Size: 16.2 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 M3 in SEDS Messier database
Other Messier galleries, images or catalogs

Observing Log
Date of observation: February 20, 1999
Time at end of first CCD image 02:48 PST
Time at end of last CCD image 02:58 PST
Observing Location: At home on the drive way
Observation of object: M3 is a large bright and round globular cluster with some stars resolved to half way to center and it has a bright round core. M3 is wider and has more outlying stars than M2.
Sky Conditions
Sky transparency: 5.5 (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: 5 - 120 seconds images added together
CCD dark calibration frames: 16 - 120 seconds dark frames

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