IC 1221
| Galaxy IC 1221 |
|
|---|---|
![IC 1221 with SDSS J163440.40 + 462402.4 (in the upper spiral arm) [1] SDSS image of IC 1221](https://de.wikipedia.org/wiki/Datei:IC1221_-_SDSS_DR14.jpg)
|
|
| IC 1221 with SDSS J163440.40 + 462402.4 ( in the upper spiral arm ) SDSS image of IC 1221 | |
| AladinLite | |
| Constellation | Hercules |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 16 h 34 m 41.629 s |
| declination | + 46 ° 23 ′ 31.45 ″ |
| Appearance | |
| Morphological type | Scd |
| Brightness (visual) | 13.8 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 1.30 'x 1.1' |
| Position angle | 0 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.018143 ± 0.000147 |
| Radial velocity | 5439 ± 44 km / s |
|
Stroke distance v rad / H 0 |
(250 ± 18) x 10 6 ly (76.8 ± 5.4) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | July 10, 1890 |
| Catalog names | |
| IC 1221 • UGC 10458 • PGC 58528 • CGCG 251-030 • MCG + 08-30-030 • 2MASX J16344160 + 4623319 • SDSS J163441.61 + 462331.5 • KPG 500A | |
IC 1221 is a spiral galaxy of Hubble type Scd in the constellation Hercules at the northern sky . It is estimated to be 250 million light years from the Milky Way and about 95,000 light years in diameter. Together with IC 1222 , it forms the isolated galaxy pair KPG 500 .
The object was discovered by Lewis Swift on July 10, 1890 .