Object: Constellation: Coordinates: Size: Brightness:
NGC 6946 Cep / Cyg 20h35m / +6009' 11.5' x 9.8' 9.0mag

The galaxy NGC 6946 ("Fireworks Galaxy") on the border between the constellations Cepheus and Cygnus on July 31 / August 1, 2013. The spiral galaxy is 22 million light years from Earth and was discovered by William Herschel in 1798 (source: Wikipedia).

Twenty-three exposures of approximately 3 minutes at ISO 800 were added for this shot with the DeepSkyStacker software and the final image processing was done in Photoshop. The total exposure time is 1 hour and 15 minutes - a personal record with the equatorial platform.
Equipment: Canon EOS 450Da camera, TeleVue ParaCorr Type II coma corrector, 16" f/4.5 dobsonian telescope "Ninja" 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 NGC 6946. Map © 2013 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .