NGC 7221
| Galaxy NGC 7221 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Southern fish |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 22 h 11 m 15.25 s w |
| declination | -30 ° 33 ′ 47.4 ″ w |
| Appearance | |
| Morphological type | SB (rs) b |
| Brightness (visual) | 12.1 mag |
| Brightness (B-band) | 12.8 mag |
| Angular expansion | 2.0 '× 1.6' |
| Position angle | 10 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7221 group LGG 454 |
| Redshift | 0.014537 ± 0.000010 |
| Radial velocity | 4358 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(196 ± 14) · 10 6 ly (60.2 ± 4.2) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | September 27, 1834 |
| Catalog names | |
| NGC 7221 • PGC 68235 • ESO 467-018 • MCG -05-52-043 • IRAS 22083-3048 • 2MASX J22111524-3033472 • SGC 220823-3048.6 • HIPASS J2211-30 • LDCE 1505 NED002 • WISEA J221115.24-303347.4 | |
NGC 7221 is a bar-spiral galaxy of the Hubble-type SBbc in the constellation Southern Pisces. It is estimated to be 196 million light years from the Milky Way and about 115,000 light years in diameter. Together with NGC 7229 and PGC 68360 , it forms the small NGC 7221 group ( LGG 454 ).
The object was discovered by John Herschel on September 27, 1834 .