NGC 6921
| Galaxy NGC 6921 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Fox |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 20 h 28 m 28.8 s |
| declination | + 25 ° 43 ′ 24 ″ |
| Appearance | |
| Morphological type | SA (r) 0 / a: / Sy1 / 2 |
| Brightness (visual) | 13.4 mag |
| Brightness (B-band) | 14.4 mag |
| Angular expansion | 0.9 'x 0.2' |
| Position angle | 141 ° |
| Surface brightness | 11.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.014467 ± 0.000033 |
| Radial velocity | 4337 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(203 ± 14) · 10 6 ly (62.3 ± 4.4) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | September 6, 1863 |
| Catalog names | |
| NGC 6921 • UGC 11570 • PGC 64768 • MCG + 04-48-001 • 2MASX J20282884 + 2543241 • NVSS J202828 + 254325 • SWIFT J2028.5 + 2543b | |
NGC 6921 is a lenticular galaxy with an active nucleus of the Hubble type S0 / a in the constellation Fox in the northern sky . It is an estimated 203 million light years away from the Milky Way and about 55,000 light years in diameter .
The object was discovered by Albert Marth on September 6, 1863 .