NGC 891 – Edge-on Spiral Galaxy in Andromeda

Telescope: Meade N6 at f/5, Orion Atlas EQ-G
Camera: Full-spectrum Modified Canon 600D, Orion Imaging Skyglow Filter
Guide scope: Williams Optics 50mm, Meade DSI Pro III, PHD
Exposure: (24+53)x120sec ISO 800 saved as RAW
Darks: Internal (Long Exposure Noise Reduction On)
Flat: 32x3sec, ISO 800, LED tracing tablet covered with 3 layers of muslin
Average Light Pollution: Red zone, fair transparency (both nights)
Lensed Sky Quality Meter: 18.6 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Backyard EOS, Nebulosity, Deep Sky Stacker, Photoshop

This is NGC 891, a fairly large edge-on spiral galaxy in Andromeda. This object is difficult to see visually, but knowing what it shows photographically makes in worth the effort. The dark lane cutting across the galaxy is a band of dust and gas that tends to collect in the plane of spiral galaxy arms.

I left this wide field a bit wide to include the edge of a galaxy cluster in the lower left corner. The fairly bright little edge-on at the very bottom of the field is NGC 898 at Mv 12.9. Moving from there to the upper left a bit is PGC 9108 (Mv 14.7), a tiny spiral that looks like a flare coming off of a star, the tiny edge-on PGC 9151 (Mv 15.Cool, and a neat little face-on spiral NGC 906 (Mv 12.9). The closer you look, the more you find! It is neat to consider that each one of these tiny patches of light is home to billions of suns.

The source images for this field were collected over 2 consecutive evenings; 24 on 11/22 and 53 on 11/23. I’m also back to using my trusty 600Da while my ZWO ASI071MC is off being exchanged for a ASI071MC Pro. It is fun seeing what my old friend can do.


NGC 891 (11-22&23-2017)-2j.jpg