IC 691
| Galaxy IC 691 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 11 h 26 m 44.3 s |
| declination | + 59 ° 09 ′ 20 ″ |
| Appearance | |
| Morphological type | I?; WR? / HII |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 0.6 ′ × 0.4 ′ |
| Position angle | 150 ° |
| Surface brightness | 11.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.003992 ± 0.000008 |
| Radial velocity | (1197 ± 2) km / s |
|
Stroke distance v rad / H 0 |
(57 ± 4) · 10 6 ly (17.6 ± 1.2) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | April 17, 1888 |
| Catalog names | |
| IC 691 • UGC 6447 • PGC 35206 • CGCG 291-070 • MCG + 10-16-139 • 2MASX J11264427 + 5909197 • Mrk 169 • LDCE 0867 NED020 | |
IC 691 is a galaxy of Hubble type P in the constellation Ursa Major. It is estimated to be 57 million light years from the Milky Way .
The object was discovered on April 17, 1888 by the astronomer Lewis Swift .