NGC 891 (Andromeda)
Fig. 1 - Edge-on beauty: The unbarred spiral galaxy NGC 891 in the constellation Andromeda, photographed with an 8-inch f/5 Newtonian reflector on a ZWO AM5 mount.
| Object name: | Constellation: | Coordinates: | Apparent size: | Visual brightness: |
|---|---|---|---|---|
| NGC 891 | Andromeda | 02h23m / +42°21' | 13.5' x 2.5' | 10.8 mag |
The fascinating edge-on spiral galaxy NGC 891 (Caldwell 23, Silver Sliver Galaxy, Outer Limits Galaxy) in the constellation Andromeda. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster ( the Local Supercluster contains the Local Group and the Virgo Cluster).
NGC 891 resembles our Milky Way in terms of luminosity and size. The galaxy measures 100,000 light-years in diameter, is approximately 30 million light-years from Earth and was discovered by the German-British astronomer William Herschel in 1784 (source: Wikipedia).
Eighty 3-minute exposures (240 minutes total exposure) at gain 100 and -10°C, taken on November 3 / 4, 2024, were added for this shot with Astro Pixel Processor (APP) software and the final image processing was done in Photoshop. Darks, flats, bias and darkflats were used.
Equipment: Cooled ASI 2600MC Pro camera at -10°C, TeleVue Paracorr Type II coma corrector, 8" f/5 "ONTC" Newtonian telescope riding on a ZWO AM5 Strain Wave Mount, ZWO OAG-L off axis system, ASI 174MM Mini guide camera, ASIAIR Plus.
Fig. 2 - Labeled version of the image above. The fainter galaxies UGC 1807 and NGC 898 can be seen.
Fig. 3 - Search chart for NGC 891. Copyright 2024 'The Mag-7 Star Atlas Project', www.siaris.net.