| NGC 1989 | |
|---|---|
 legacy surveys image of NGC 1989 | |
| Observation data (J2000 epoch) | |
| Constellation | Columba |
| Right ascension | 05h 34m 2342s[1] |
| Declination | −30° 48′ 03.55″[1] |
| Redshift | 0.035858[1] |
| Heliocentric radial velocity | 10557[1] |
| Distance | 482 Million[2] |
| Apparent magnitude (V) | 12.9[2] |
| Apparent magnitude (B) | 14.13[1] |
| Characteristics | |
| Type | S0[1] |
| Size | 1.40 x 1.1[3] |
| Other designations | |
| ESO 423-21, MCG -5-14-4, AM 0532-304, PGC 17464[2] | |
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NGC 1989 (also known as ESO 423-21) is a lenticular galaxy in the Columba constellation. It is about 482 million light-years away from the Milky Way. The galaxy was discovered by John Herschel on January 28, 1835.[4] Its apparent magnitude is 12.9[2] and its size is 1.40 by 1.1 arc minutes.[3]
- ^ a b c d e f "NGC 1989 -- Brightest galaxy in a Cluster (BCG)". SIMBAD. Retrieved 25 November 2017.
- ^ a b c d "Galaxy NGC 1989". DSO. Archived from the original on 1 December 2017. Retrieved 25 November 2017.
- ^ a b "Object: NGC 1989 (*)". SEDS. Retrieved 25 November 2017.
- ^ "NGC 1989 (= PGC 17464)". cseligman. Retrieved 25 November 2017.