NGC 7755
| Galaxy NGC 7755 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | sculptor |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 47 m 51.7 s |
| declination | -30 ° 31 ′ 19 ″ |
| Appearance | |
| Morphological type | SB (r) bc / HII |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.4 mag |
| Angular expansion | 3.80 × 2.8 |
| Position angle | 20 ° |
| Surface brightness | 14.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.009867 ± 0.000010 |
| Radial velocity | 2958 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(133 ± 9) · 10 6 ly (40.7 ± 2.8) Mpc |
| diameter | 150,000 ly |
| history | |
| discovery | John Herschel |
| Discovery date | September 27, 1834 |
| Catalog names | |
| NGC 7755 • PGC 72444 • ESO 471-G020 • MCG -05-56-014 • IRAS 23452-3048 • 2MASX J23475176-3031195 • SGC 234515-3048.0 • | |
NGC 7755 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SBbc in the Sculptor constellation in the southern sky . It is around 133 million light years away from the Milky Way and has a diameter of around 150,000 light years .
The type II supernova SN 2004cx was observed here.
The object was discovered by John Herschel on September 27, 1834 .