Object: Constellation: Coordinates: Size: Brightness:
Messier 92
(= NGC 6341)
Her 17h17m / +4308' 14.0' 6.3mag

The globular cluster Messier 92 in the constellation Hercules on May 4 / 5, 2014. The cluster is 26'000 light years from earth and was discovered by Johann Elert Bode in 1777 (source: Wikipedia).

22 3-minutes exposures at ISO 800 and 5 1-minute exposures were added for this shot in DeepSkyStacker (resulting in a 1 hour and 18 minutes exposure) and the final image processing was done in Photoshop. Transparency was very low due to clouds and haze.
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 92. Map © 2014 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .