Object: Constellation: Coordinates: Size: Brightness:
Messier 27
(= NGC 6853)
Vul 20h00m / +2243' 8.0' x 5.7' 7.5mag

The planetary nebula Messier 27 ("Dumbbell nebula") in the constellation of Vulpecula on July 31 / August 1, 2014. The gaseous remains of a red giant star are 1360 light years from Earth and were discovered by Charles Messier in 1764 (source: Wikipedia).

Twenty 3 minute exposures at ISO 800 with no dark frame subtraction were stacked with Deep Sky Stacker (resulting in a 1 h 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 27. Map © 2014 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .