NGC 551
| Galaxy NGC 551 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 27 m 40.6 s |
| declination | + 37 ° 10 ′ 59 ″ |
| Appearance | |
| Morphological type | SBbc |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.5 likes |
| Angular expansion | 1.8 ′ × 0.8 ′ |
| Position angle | 140 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 507 group LGG 26 |
| Redshift | 0.017332 ± 0.000023 |
| Radial velocity | 5196 ± 7 km / s |
|
Stroke distance v rad / H 0 |
(239 ± 17) x 10 6 ly (73.2 ± 5.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 21, 1786 |
| Catalog names | |
| NGC 551 • UGC 1034 • PGC 5450 • CGCG 521-030 • MCG + 06-04-027 • IRAS 01247 + 3655 • 2MASX J01274066 + 3710584 • GC 327 • H III 560 • h 123 • NVSS J012740 + 371054 | |
NGC 551 is a bar-spiral galaxy of the Hubble type SBbc in the constellation Andromeda in the northern sky . It is an estimated 239 million light years from the Milky Way and about 125,000 light years in diameter.
The object was discovered on September 21, 1786 by the German-British astronomer Wilhelm Herschel .