Messier 81 (Ursa Major)

Object: Constellation: Coordinates: Size: Brightness:
Messier 81
(NGC 3031)
UMa 09h56m / +6904' 26.9' x 14.1' 7.0mag

The galaxy Messier 81 (M81, NGC 3031, "Bode's Galaxy") in the constellation Ursa Major on February 25/26, 2014. Messier 81 is about 12 million light years from earth and was discovered by Johann Elert Bode in 1774 (source: Wikipedia).

Twenty 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 1 hour and 5 minutes exposure) and the final image processing was done in Photoshop.
Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison: image of the moon with the same equipment).

Search chart for M81. Map © 2014 "The Mag-7 Star Atlas Project", Map is slightly modified. The map can be downloaded here .