| Telescope / Lens | TEC 140mm f/7 Refractor |
| Mount Type | Astro-Physics 1200 |
| Camera | ST8XME |
| Filters | Astro-Don LRGB |
| Film | CCD |
| Exposure | 4 hours 5 minutes 245 RGB=45 min. @ -25° C |
| Processing | CCDSoft, AIP4Win, CCDStack & Photoshop CS2 |
| Date | 9-8-2007 |
| Location | June Mountain, near Dexter, Oregon |
| Conditions | 3252′ magnitude 6.2 Skies; Clear & Steady |
NGC 891 Edge on Spiral (HV19) Caldwell 23
NGC 891 is a great Edge on Galaxy in the constellation of Andromeda. NGC 891 is 30 million light years from earth at apparent magnitude 10.8 and 120 thousand light years across. At 13.5′ x 2.5 arcminutes, it shows up nicely in medium to large amateur telescopes.
This Edge on Spiral galaxy’s dust lanes are prominent and show nice detail in long exposures. The dust lanes are similar to out own Milky Way if observed from the same distance edge on. On a clear summer night, the dark rift from Cygnus down to Sagittarius is now given a different perspective. William Herschel discovered NGC 891 on October 6, 1784, this galaxy is a member of the NGC 1023 group of galaxies