Q490345
Sign in to saveAlso known as C 23, Silver Sliver Galaxy, Outer Limits Galaxy
galaxy in the constellation Andromeda
Key facts
- Constellation
- Andromeda
- Right ascension
- 02 22 33.4
- Declination
- +42 ° 20 ′ 57 ″
- Redshift
- 528 ± 4 km/ s
- Distance
- 27.3 ± 1.8 Mly (8.4 ± 0.5 Mpc )
- Type
- SA(s)b?
- Size
- 130,700 ly (40.09 kpc ) (estimated)
- Apparent size v
- 13′.5 × 2′.5
via Wikipedia infobox
Wikidata facts
- Constellation
- Andromeda
- Distance from Earth
- 9.17
- Image
- N891s.jpg
Show 11 more facts
- declination
- 42.3483194
- Commons category
- NGC 891
- catalog code
- Caldwell 23
- discoverer or inventor
- William Herschel
- time of discovery or invention
- 1784-10-06
- apparent magnitude
- 5.938
- galaxy morphological type
- SA(s)b?
- redshift
- 0.001761
- right ascension
- 35.6371125
- radial velocity
- 72
- epoch
- J2000.0
Sources (2)
via Wikidata · CC0
~4 min read
Encyclopedic overview
NGC 891 (also known as Caldwell 23, the Silver Sliver Galaxy, and the Outer Limits Galaxy) 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.
Excerpted from Wikipedia’s “Q490345” article, available under the CC BY-SA 4.0 licence.