Object: Constellation: Coordinates: Size: Brightness:
Messier 51
(= NGC 5194 / 5195)
CVn 13h30m / +47°12' 11.2'x 6.9' 8.1mag

The famous interacting spiral galaxy Messier 51 (NGC 5194) in the constellation of Canes Venatici with its small companion galaxy NGC 5195 on May 31 / June 1, 2014. The galaxy pair is about 23 million light years from Earth and was discovered by Charles Messier in 1773. The smaller galaxy NGC 5195 was discovered in 1781 by Pierre Méchain (source: Wikipedia).

Twenty-three 3 minute exposures at ISO 400 with no dark frame subtraction were stacked with Deep Sky Stacker (resulting in a 1 h 16 min exposure) and further processed 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 Messier 51. Map © 2014 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .