NGC 2721
| Galaxy NGC 2721 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Water snake |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 08 h 58 m 56.5 s |
| declination | -04 ° 54 ′ 07 ″ |
| Appearance | |
| Morphological type | SB (rs) bc pec / HII |
| Brightness (visual) | 12.2 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 2.4 ′ × 1.6 ′ |
| Position angle | 153 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.012382 +/- 0.000010 |
| Radial velocity | (3712 +/- 3) km / s |
|
Stroke distance v rad / H 0 |
(158 ± 11) · 10 6 ly (48.5 ± 3.4) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | February 1, 1786 |
| Catalog names | |
| NGC 2721 • PGC 25231 • MCG -01-23-015 • IRAS 08564-0442 • 2MASX J08585649-0454072 • GC 1739 • H II 529 • h 543 • | |
NGC 2721 is a barred spiral galaxy with a high rate of star formation of the Hubble type SBbc in the constellation Water Serpent south of the ecliptic . It is an estimated 158 million light years from the Milky Way .
The object was discovered on February 1, 1786 by the astronomer William Herschel with a 48 cm telescope.