Object: Constellation: Coordinates: Size: Brightness:
NGC 891 And 02h23m / +4221' 13.5' x 2.5' 10.1mag

The fascinating edge-on spiral galaxy NGC 891 in the constellation Andromeda on October 26 / 27, 2014. A dark lane can be seen across the whole length of the galaxy. NGC 891 is approximately 30 million light-years from Earth, measures 100'000 light-years in diameter and was discovered by William Herschel in 1784 (source: Wikipedia).

Fourty-five 3 minute exposures at ISO 800 with no dark frame subtraction were stacked with Deep Sky Stacker (resulting in a 2 h 15 min exposure) and further processed in Photoshop. For the background, only twenty-three 3 minute exposures were used (amounting to 1 h 19 min exposure time).
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).

Comparison with an image of NGC 891 from Burnham's Celestial Handbook.

Search chart for NGC 891. Map © 2015 "The Mag-7 Star Atlas Project", www.siaris.net. Map is modified. The map can be downloaded here .