NGC 5255
| Galaxy NGC 5255 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 37 m 18.1 s |
| declination | + 57 ° 06 ′ 32 ″ |
| Appearance | |
| Morphological type | S? |
| Brightness (visual) | 14.5 mag |
| Brightness (B-band) | 15.4 mag |
| Angular expansion | 0.8 ′ × 0.2 ′ |
| Position angle | 24 ° |
| Surface brightness | 12.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.023209 +/- 0.000070 |
| Radial velocity | 6958 +/- 21 km / s |
|
Stroke distance v rad / H 0 |
(316 ± 22) · 10 6 ly (96.9 ± 6.8) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1789 |
| Catalog names | |
| NGC 5255 • PGC 48124 • CGCG 294-051 • MCG + 10-19-98 • GC 3622 • H III 803 • | |
NGC 5255 is a 14.5 mag bright spiral galaxy of the Hubble type Sa in the constellation Great Bear . It is an estimated 316 million light years from the Milky Way .
The object was discovered on April 17, 1789 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “suspected eF, vS”.
Web links
- NGC 5255.SIMBAD , accessed February 8, 2016 .
- NGC 5255. DSO Browser, accessed February 8, 2016 .