NGC 891 in Andromeda

NGC 891
 (also known as Caldwell 23) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6, 1784. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster. It has an H II nucleus. The object is visible in small to moderate size telescopes as a faint elongated smear of light with a dust lane visible in larger apertures. In 1999, the Hubble Space Telescope imaged NGC 891 in infrared. In 2005, due to its attractiveness and scientific interest, NGC 891 was selected to be the first light image of the Large Binocular Telescope. In 2012, it was again used as a first light image of the Discovery Channel Telescope with the Large Monolithic Imager.

Imaging cameras: Canon 20Da, Artemis Atik 383L+
Mounts: Vixen New Atlux + Skysensor 2000
Guiding telescopes or lenses: Orion Optics UK SPX 250
Guiding cameras: M-Gen Guiding Kamera
Focal reducers: GPU Komakorrektor
Software: Adobe Photoshop CS2, DSS, Fitswork
Filters: Baader Planetarium 36mm Luminance
Accessories: Lacerta MGEN2, Lacerta OAG
Dates: Oct. 1, 2013, Oct. 2, 2013, Oct. 7, 2013, Oct. 24, 2013
Locations: Kreben
75×600″ ISO400
Baader Planetarium 36mm Luminance: 16×360″ -20C bin 1×1
Integration: 14.1 hours
Darks: ~12
Flats: ~139

Author: Stefan Westphal
AstroPhotography of the day by SPONLI 26 Aug 2014