| NGC 20 | |
|---|---|
 | |
| Observation data | |
| Constellation | Andromeda |
| Right ascension | 00h 09m 32.8s [1] |
| Declination | +33° 18′ 31″ [1] |
| Redshift | 0.016581 [2] |
| Heliocentric radial velocity | 4971 ± 49 km/s [2] |
| Apparent magnitude (V) | 14.04 [1] |
| Characteristics | |
| Type | Lenticular |
| Other designations | |
| NGC 6, NGC 20, UGC 00084, CGCG 498-082, CGCG 499-054, CGCG 0006.9+3303, MCG +05-01-036, 2MASX J00093270+3318310, 2MASXi J0009327+331831, USGC U008 NED04,MAPS-PP O_1257_0037278, PGC 000679, UZC J000932.7+331831, LGG 001:G93 008 | |
NGC 20 (also known as NGC 6) is a lenticular galaxy in the constellation of Andromeda.
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The double name of the galaxy is due to the history of its discoveries: for the first time it was discovered on September 18, 1857, by Irish astronomer R. J. Mitchell, an assistant to William Parsons, Lord Rosse; however, the information was not published until Lawrence Parsons, the son of W. Parsons, did so in 1880. Consequently, the galaxy was independently rediscovered by Herman Schultz on October 16, 1866, and by Lewis Swift in 1885. As a result, J. L. E. Dreyer cataloged it twice in the New General Catalogue, as NGC 6 (from Swift's observation) and NGC 20 (from Lord Rosse's). [3]
