NGC 7123
| Galaxy NGC 7123 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Indus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 21 h 50 m 46.6 s |
| declination | -70 ° 20 ′ 03 ″ |
| Appearance | |
| Morphological type | Sat |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.6 mag |
| Angular expansion | 3 ′ × 1.1 ′ |
| Position angle | 146 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7123 group LGG 447 |
| Redshift | 0.012335 ± 0.000087 |
| Radial velocity | (3698 ± 26) km / s |
|
Stroke distance v rad / H 0 |
(160 ± 11) · 10 6 ly (49.1 ± 3.5) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | July 24, 1835 |
| Catalog names | |
| NGC 7123 • PGC 67466 • ESO 075-027 • 2MASX J21504657-7020030 • GC 4696 • h 3886 • 2MASS J21504623-7020012 • 2MIG 2968 | |
NGC 7123 is a spiral galaxy of Hubble type Sa in the constellation Indus the southern sky . It is estimated to be 160 million light years from the Milky Way and about 150,000 light years in diameter.
Together with IC 5106 , IC 5116 and PGC 67474 , the NGC 7123 group or LGG 447 forms .
The object was discovered by John Herschel on July 24, 1835 .
NGC 7123 group ( LGG 447 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 7123 | PGC 67466 | 160 |
| IC 5106 | PGC 66824 | 167 |
| IC 5116 | PGC 67055 | 165 |
| PGC 67474 | ESO 75-028 | 165 |