IC 18
| Galaxy IC 18 |
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|---|---|
|
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| Image of the galaxy using the Hubble Space Telescope | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 28 m 34.9 s |
| declination | -11 ° 35 ′ 12 ″ |
| Appearance | |
| Morphological type | SBb pec |
| Brightness (visual) | 14.6 mag |
| Brightness (B-band) | 15.4 mag |
| Angular expansion | 1.1 '× 0.6' |
| Position angle | 15 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Redshift | (0.020251 ± 0.000113) |
| Radial velocity | (6071 ± 34) km / s |
|
Stroke distance v rad / H 0 |
(274 ± 19) x 10 6 ly (83.9 ± 5.9) Mpc |
| diameter | 100,000 ly |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | August 31, 1892 |
| Catalog names | |
| IC 18 • PGC 1759 • Arp 100 • VV 234 • LDCE 0022 NED001 | |
IC 18 is a bar-spiral galaxy of the Hubble type SBb pec in the constellation Whale south of the ecliptic . It is around 274 million light years away from the Milky Way and has a diameter of around 45,000 light years and a tidal tail 100,000 ly long . The galaxy and its elliptical companion IC 19 form an interactive pair that is registered as Arp 100 in the Arp catalog .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with an elliptical companion on one arm (Arp catalog) .
The object was discovered by Stéphane Javelle on August 31, 1892 .
See also
Web links
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7
Individual evidence
Attention: The sorting key "IC 0018" overwrites the previously used key "IC0018".