NGC 689
| Galaxy NGC 689 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Chemical furnace |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 49 m 51.8 s |
| declination | -27 ° 28 ′ 00 ″ |
| Appearance | |
| Morphological type | (R'_1) SB (r) b / HII |
| Brightness (visual) | 13.8 mag |
| Brightness (B-band) | 14.6 mag |
| Angular expansion | 1 ′ × 0.6 ′ |
| Position angle | 68 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.014043 ± 0.000033 |
| Radial velocity | 4210 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(186 ± 13) · 10 6 ly (57.1 ± 4.0) Mpc |
| history | |
| discovery | Ormond Stone |
| Discovery date | 1886 |
| Catalog names | |
| NGC 689 • PGC 6724 • ESO 414-005 • MCG -05-05-19 • IRAS 01475-2742 • 2MASX J01495176-2728000 • SGC 014734-2742.8 • GALEX ASC J014951.70-272758.9 • 2MIG 203 | |
NGC 689 is a spiral galaxy with extensive star formation regions of the Hubble type Sab in the constellation Fornax in the southern sky . It is estimated to be 186 million light years from the Milky Way and about 55,000 light years across.
In the same area of the sky is u. a. the galaxy IC 1729 .
The Type Ia supernova SN 2007rv was observed here.
The object was discovered in 1886 by the American astronomer Ormond Stone .
Web links
- SIMBAD Astronomical Database
- Auke Slotegraaf : NGC 689. Deep Sky Observer's Companion, accessed on September 19, 2015 .