NGC 6581
| Galaxy NGC 6581 / IC 1280 |
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|---|---|
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|
| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 18 h 12 m 18.421 s |
| declination | + 25 ° 39 ′ 44.45 ″ |
| Appearance | |
| Morphological type | C. |
| Brightness (visual) | 14.3 mag |
| Brightness (B-band) | 15.3 mag |
| Angular expansion | 0.4 ′ × 0.4 ′ |
| Surface brightness | 12.2 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 653 |
| Redshift | 0.014877 ± 0.000133 |
| Radial velocity | 4460 ± 40 km / s |
|
Stroke distance v rad / H 0 |
(207 ± 15) · 10 6 ly (63.6 ± 4.5) Mpc |
| history | |
| discovery | Édouard Stephan |
| Discovery date | July 1, 1870 |
| Catalog names | |
| NGC 6581 • IC 1280 • PGC 61549 • CGCG 142-021 • MCG + 04-43-010 • 2MASX J18121844 + 2539443 • GC 5902 • WISEA J181218.41 + 253944.4 • LDCE 1290 NED005 | |
NGC 6581 = IC 1280 is a 14.3 mag bright compact elliptical galaxy of the Hubble type C in the constellation Hercules in the northern sky . It is an estimated 207 million light years away from the Milky Way and about 25,000 light years in diameter.
In the same area of the sky is u. a. the galaxy IC 4697 .
The object was discovered on July 1, 1870 by Édouard Stephan . Due to an error in Stephen's position, the observation of Guillaume Bigourdan on July 1, 1886 under IC 1280 led to an entry in the index catalog .
Web links
- IC 1280. SIMBAD , accessed on September 19, 2019 (English).
- NGC 6581. DSO Browser, accessed September 19, 2016 .
- Auke Slotegraaf : NGC 6581. Deep Sky Observer's Companion, accessed on September 19, 2016 .
- Aladin Lite: NGC 6581