| Object Data |
| Description |
M81 is a nearly featureless spiral galaxy.
|
| Constellation |
Ursa Major the Great Bear |
| Right Ascension |
9h 55m 55s |
| Declination |
+69° 2' 47" |
| Magnitude |
7.8 |
| Angular size |
25 arcminutes |
| Distance |
3.36 ± 0.34 megaparsecs (10.9 million light years) |
| Radial Velocity |
-34 kilometers per second (approaching) |
| Image Data |
| Photographer |
Fred Lehman |
| Main Scope |
Meade 14" LX200GPS |
| Imaging Scope |
Celestron 5" SCT @ f/3.3 (415mm) |
| Guide Camera |
Not needed |
| Imaging Camera |
Starlight Xpress MX7C |
| Resolution |
780 x 580 @ 4.1 arcseconds per pixel |
| Exposure |
Twenty exposures of one minute each. Aligned,
stacked, and processed with AstroArt. |
| Date |
January 16, 2004 |
| Location |
Area 51 in Big Cypress National Preserve in central
South Florida. |
