Galaxy
Silver Sliver Galaxy
Spiral galaxy · C23 · NGC 891
Spiral galaxy in Andromeda
Photo: Hewholooks · CC BY-SA 3.0 · Wikimedia Commons
NGC 891 is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. Alternatively, it known as Caldwell 23, the Silver Sliver Galaxy, or the Outer Limits Galaxy. 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.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~31 million light-years
Apparent mag.
+10
Apparent size
13.0′ × 3.0′
Best seen with
Telescope
Catalogue
C23 · NGC 891
Did you know
- Listed as Caldwell 23 in the Caldwell catalogue, also known as NGC 891.
- Found in the constellation Andromeda.
- Needs a telescope to see clearly.
