IC 721
| Galaxy IC 721 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | cups |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 11 h 42 m 28.9 s |
| declination | -08 ° 20 ′ 25 ″ |
| Appearance | |
| Morphological type | SB (s) cd? / HII |
| Brightness (visual) | 14.4 mag |
| Brightness (B-band) | 15.1 mag |
| Angular expansion | 1.3 ′ × 0.3 ′ |
| Position angle | 115 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.022412 ± 0.000033 |
| Radial velocity | (6719 ± 10) km / s |
|
Stroke distance v rad / H 0 |
(294 ± 21) · 10 6 ly (90.1 ± 6.3) Mpc |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | May 13, 1893 |
| Catalog names | |
| IC 721 • PGC 36354 • MCG -01-30-026 • IRAS 11399-0803 • 2MASX J11422887-0820251 • NVSS J114228-082023 | |
IC 721 is a spiral galaxy with extensive star formation regions of the Hubble type Sc in the constellation Becher in the southern sky . It is estimated to be 294 million light-years away from the Milky Way and has a diameter of about 115,000 ly
. a. the galaxies IC 723 , IC 733 , IC 734 .
The object was discovered by Stéphane Javelle on May 13, 1893 .