NGC 4991
| Galaxy NGC 4991 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 09 m 15.1 s |
| declination | + 02 ° 20 ′ 52 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 14.7 mag |
| Brightness (B-band) | 15.5 mag |
| Angular expansion | 0.6 ′ × 0.4 ′ |
| Position angle | 90 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.056926 +/- 0.000050 |
| Radial velocity | 17066 +/- 15 km / s |
|
Stroke distance v rad / H 0 |
(760 ± 53) x 10 6 ly (232.9 ± 16.3) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | April 30, 1864 |
| Catalog names | |
| NGC 4991 • PGC 45604 • CGCG 044-013 • IRAS 13066 + 0237 • GC 5719 • | |
NGC 4991 is a 14.7 mag bright spiral-shaped radio galaxy of the Hubble-type Sb in the constellation of Virgo . It is estimated to be 760 million light years from the Milky Way .
It was discovered by Albert Marth on April 30, 1864 .
Web links
- NGC 4991. SIMBAD, accessed February 23, 2015 .
- NGC 4991. DSO Browser, accessed February 23, 2015 .
- Auke Slotegraaf: NGC 4991. Deep Sky Observer's Companion, accessed on February 23, 2015 .