NGC 7721
| Galaxy NGC 7721 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Aquarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 38 m 48.6 s |
| declination | -06 ° 31 ′ 04 ″ |
| Appearance | |
| Morphological type | SA (s) c |
| Brightness (visual) | 11.6 mag |
| Brightness (B-band) | 12.2 mag |
| Angular expansion | 2.8 'x 1.1' |
| Position angle | 15 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7721 group LGG 481 |
| Redshift | 0.006721 ± 0.000010 |
| Radial velocity | 2015 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(94 ± 7) x 10 6 ly (28.9 ± 2.0) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 10, 1785 |
| Catalog names | |
| NGC 7721 • PGC 72001 • MCG -01-60-017 • IRAS 23362-0647 • 2MASX J23384864-0631043 • GC 4997 • H II 432 • h 2260 • NVSS J233848-063104 • LDCE 1587 NED004 • HOLM 812A | |
NGC 7721 is a spiral galaxy of Hubble type Sc in the constellation Aquarius on the ecliptic . It is estimated to be 94 million light-years from the Milky Way and about 75,000 light-years across.
The Type Ia supernova SN 2007le was observed here.
The object was discovered by Wilhelm Herschel on September 10, 1785 .
NGC 7721 group ( LGG 481 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 7721 | PGC 72001 | 94 |
| PGC 72006 | MCG -01-60-016 | 96 |
| PGC 72252 | MCG -01-60-026 | 98 |
Web links
Commons : NGC 7721 - collection of images, videos, and audio files
