NGC 20
| Galaxy NGC 6 / NGC 20 |
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|---|---|
![NGC 20 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC20_-_SDSS_DR14.jpg)
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| NGC 20 SDSS image | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 00 h 09 m 32.70 s |
| declination | + 33 ° 18 ′ 31.2 ″ |
| Appearance | |
| Morphological type | S0-: |
| Brightness (visual) | 13.1 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.7 ′ × 1.6 ′ |
| Position angle | 140.5 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Affiliation |
NGC 7819 Group NGC 7831 Group LGG 1 |
| Redshift | 0.016581 ± 0.000163 |
| Radial velocity | 4971 ± 49 km / s |
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Stroke distance v rad / H 0 |
(230 ± 16) x 10 6 ly (70.6 ± 5.0) Mpc |
| history | |
| discovery | RJ Mitchell Lewis A. Swift |
| Discovery date | September 18, 1857 September 20, 1885 |
| Catalog names | |
| NGC 6 • NGC 20 • UGC 84 • PGC 679 • CGCG 498-082 • CGCG 499-054 • MCG + 05-01-036 • 2MASX J00093270 + 3318310 • GC 6 • GC 5086 • 2MASS J00093269 + 3318312 • LDCE 4 NED005 • NSA 126300 | |
NGC 6 = NGC 20 is an elliptical galaxy of the Hubble type E / S0 in the constellation Andromeda in the northern sky . It is an estimated 230 million light years from the Milky Way and about 100,000 light years in diameter. The galaxy is considered a member of the NGC 7831 group ( LGG 1 ).
In the same area of the sky are u. a. the galaxies NGC 13 , NGC 19 , NGC 21 , NGC 29 .
The object was discovered on September 18, 1857 by the Irish astronomer R. J. Mitchell , an assistant to William Parsons . Lewis A. Swift observed this galaxy on September 20, 1885. However, the double observation was not recognized, and so the galaxy now had two catalog numbers: NGC 20 (Parsons observation) and NGC 6 (Swift).
Web links
Commons : NGC 20 - collection of images, videos and audio files
