Object: Constellation: Coordinates: Size: Brightness:
Messier 15
(NGC 7078)
Pegasus 21h30m / +1210' 18' 6.2mag

The globular cluster Messier 15 (NGC 7078) in the constellation Pegasus on August 30, 2016. Messier 15 is 33'600 light-years from Earth, 175 light-years in diameter and was discovered by Jean-Dominique Maraldi in 1746. It is one of the oldest known and one of the most densely packed globular clusters known in the Milky Way galaxy (source: Wikipedia).

Twenty-one exposures of approximately 3 minutes and six exposures of approximately 1 minute each at ISO 800 were stacked with no dark frame subtraction with Deep Sky Stacker (resulting in a 1 h 15 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 15. Map © 2016 "The Mag-7 Star Atlas Project", www.siaris.net. Map is modified. The map can be downloaded here .