NGC 641
| Galaxy NGC 641 |
|
|---|---|
![NGC 641 & NGC 644 [1]](https://de.wikipedia.org/wiki/Datei:NGC_0641_DSS.jpg)
|
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| NGC 641 & NGC 644 | |
| AladinLite | |
| Constellation | Phoenix |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 38 m 39.23 s |
| declination | -42 ° 31 ′ 39.1 ″ |
| Appearance | |
| Morphological type | E. |
| Brightness (visual) | 12.1 mag |
| Brightness (B-band) | 13.1 mag |
| Angular expansion | 1.4 ′ × 1.3 ′ |
| Position angle | 4 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | SSRS group 42 |
| Redshift | 0.021091 ± 0.000057 |
| Radial velocity | 6323 ± 17 km / s |
|
Stroke distance v rad / H 0 |
(279 ± 20) x 10 6 ly (85.5 ± 6.0) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | September 5, 1834 |
| Catalog names | |
| NGC 641 • PGC 6081 • ESO 244-042 • MCG -07-04-026 • 2MASX J01383922-4231391 • SGC 013631-4246.8 • GC 380 • h 2432 • GALEX ASC J013839.05-423138.7 • LDCE 102 NED002 | |
NGC 641 is an elliptical galaxy of the Hubble type E / S0 in the constellation Phoenix in the southern sky . It is estimated to be 279 million light years from the Milky Way and about 115,000 light years in diameter. Presumably it forms a gravitationally bound galaxy pair together with NGC 644 .
The object was discovered on September 5, 1834 by the British astronomer John Herschel .
Web links
- SIMBAD Astronomical Database
- Auke Slotegraaf : NGC 641. Deep Sky Observer's Companion, accessed September 4, 2015 .