Object: Constellation: Coordinates: Size: Brightness:
NGC 6781 Aql 19h18m / +0632' 1.8' x 1.8' 11.4mag

The planetary nebula NGC 6781 in the constellation Aquila (Eagle) on July 10 / 11, 2013. The nebula's distance to Earth is approximately 3000 light years. NGC 6781 was discovered by William Herschel in 1788 (source: Wikipedia).

Seventeen 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 54 minute exposure) and the final image processing was done 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 NGC 6781. Map © 2013 "The Mag-7 Star Atlas Project", www.siaris.net. Map is slightly modified. The map can be downloaded here .
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