Galaxy NGC 891 is member of NGC 1023 group of galaxies and its approximate mean surface brightness is 13.6 (in magnitude per square arcminute).
Also some little galaxies can be found from picture for example NGC 898, 906, 909, 910, 911, 912, 914, 923.
Photographed on nights 16.10.2011, 19.10.2011 and 20.11.2011.
Some gradients are remain visible.
Camera: Canon 30D mod
Optics: Celestron Omni 150 f/5 (MPCC)
Mount: EQ-6 SynTrek
Guider: QHY5 & WO ZS66 +PHDGuiding
Exposures: 236x120s, ISO800
Processing: DSS & PS
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