IC 4689
| Galaxy IC 4689 |
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.jpg)
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| The galaxies IC 4687 (center), IC 4686 (right of center) and IC 4689 (right edge of the image) recorded by the Hubble space telescope | |
| AladinLite | |
| Constellation | peacock |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 18 h 13 m 40.3 s |
| declination | -57 ° 44 ′ 53 ″ |
| Appearance | |
| Morphological type | Sa: pec |
| Brightness (visual) | 14.2 mag |
| Brightness (B-band) | 15.1 mag |
| Angular expansion | 0.9 ′ × 0.3 ′ |
| Position angle | 143 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 418 |
| Redshift | 0.016508 ± 0.000030 |
| Radial velocity | 4949 ± 9 km / s |
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Stroke distance v rad / H 0 |
(218 ± 15) x 10 6 ly (66.7 ± 4.7) Mpc |
| history | |
| discovery | Royal Harwood Frost |
| Discovery date | August 1, 1904 |
| Catalog names | |
| IC 4689 • PGC 61604 • ESO 140-11 • 2MASX J18134033-5744542 • SGC 180921-5745.8 • FAIR 46 • AM 1809-574 • LDCE 1277 NED032 | |
IC 4689 is a spiral galaxy of Hubble type Sa in the constellation Peacock on southern sky . It is around 218 million light years away from the Milky Way and has a diameter of around 70,000 light years .
IC 4689 forms together with IC 4686 and IC 4687 an interactive galaxy trio.
The galaxy IC 4689 was discovered on August 1, 1904 by the American astronomer Royal Harwood Frost .
Web links
Commons : IC 4689 - Collection of pictures, videos and audio files
Individual evidence
- ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e SEDS : IC 4689
- ↑ Seligman . Retrieved August 2, 2017.