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

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