Messier M81

Messier Object Information
Messier object: M81 Common name for Messier object: Bode's Galaxy M81 Bode's Nebula discovered by J. E. Bode in 1774 NGC (New General Catalog) number: NGC 3031 Discription: Spiral Galaxy Located in constellation: Ursa Major Right ascension in hours:minutes: 9:55.6 Declination in degrees:minutes: 69.04	Visual magnitude: 6.9 Size: 21 x 10 arc minutes Image size: 41 arc minutes wide by 31 arc minutes high Image orientation: North is top, West is right, East is left and South is bottom Detailed discription of M81 in SEDS Messier database Other Messier galleries, images or catalogs

Observing Log
Date of observation: January 27-28, 2001
Time at end of first CCD image 23:46 PST
Time at end of last CCD image 00:05 PST
Observing Location: At home on the drive way
Observation of object: M81 is a large bright galaxy

Sky Conditions
High clouds.
Moon set at 20:25 PST on January 27, 2001
Astronomical twilight ends in the evening at 18:52 PST on January 27, 2001
Astronomical twilight starts in morning at 5:52 PST on January 28, 2001

Observing Equipment

Fastar
Celestron C-8 Schmidt-Cassegrain telescope with Fastar lens accessory and
SBIG ST-237 CCD Camera on Losmandy G-11 mount, unguided, no PEC.
CCD image time: 15 minutes imaging time made of 30 - 30 seconds images summed together

M81 image taken with Orion ShortTube 80 mm refractor telescope and Cookbook CB245 CCD Camera.

Use Test patterns to calibrate monitor brightness, contrast, height and width

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