IC 1222
| Galaxy IC 1222 |
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|---|---|
![IC 1222 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:IC1222_-_SDSS_DR14.jpg)
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| IC 1222 SDSS image | |
| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 16 h 35 m 09.196 s |
| declination | + 46 ° 12 ′ 50.07 ″ |
| Appearance | |
| Morphological type | SAB (s) c |
| Brightness (visual) | 13.5 likes |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 1.70 'x 1.3' |
| Position angle | 50 ° |
| Surface brightness | 14.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.030768 ± 0.000033 |
| Radial velocity | 9224 ± 10 km / s |
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Stroke distance v rad / H 0 |
(420 ± 29) x 10 6 ly (128.7 ± 9.0) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | July 10, 1890 |
| Catalog names | |
| IC 1222 • UGC 10461 • PGC 58544 • CGCG 251-031 • MCG + 08-30-032 • IRAS 16336 + 4618 • 2MASX J16350921 + 4612500 • Arp 73 • NVSS J163509 + 461252 • KPG 500B • WISEA J163509.18 + 461250.2 | |
IC 1222 is a bar-spiral galaxy of the Hubble type SBbc in the constellation Hercules in the northern sky . At the end of one of its spiral arms, the galaxy interacts with PGC 2277264, a smaller object with high surface brightness. It is an estimated 420 million light-years from the Milky Way and about 210,000 light-years across. Together with IC 1221 , it forms the optical pair of galaxies KPG 500 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with a small companion of high surface brightness on one arm (Arp catalog) .
The type 1c? Supernova SN 2001dq was observed here.
The object was discovered by Lewis Swift on July 10, 1890 .