NGC 251
NGC 251 is a spiral galaxy in the constellation of Pisces. It was discovered on October 15, 1784, by Frederick William Herschel.
| NGC 251 | |
|---|---|
 SDSS image of NGC 251. | |
| Observation data (J2000 epoch) | |
| Constellation | Pisces |
| Right ascension | 00h 47m 54.031s[1] |
| Declination | +19° 35′ 48.51″[1] |
| Redshift | 0.015184[2] |
| Helio radial velocity | 4552 km/s[2] |
| Distance | 204.36 ± 12.64 Mly (62.657 ± 3.876 Mpc)[2] |
| Apparent magnitude (B) | 14.6[3] |
| Characteristics | |
| Type | Sc[2] |
| Size | 148,600 ly (45,570 pc)[2][note 1] |
| Apparent size (V) | 2.4′ × 1.9′[2] |
| Other designations | |
| UGC 490, MGC+03-03-003, PGC 2806[3] | |
Notes
- POSS1 103a-O values used.
References
- Skrutskie, M. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.
- "NED results for object NGC 0251". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 5 May 2017.
- "NGC 251". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 May 2017.
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