NGC 5808
| Galaxy NGC 5808 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Little Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 14 h 54 m 02.8 s |
| declination | + 73 ° 07 ′ 54 ″ |
| Appearance | |
| Morphological type | SAB (rs) bc |
| Brightness (visual) | 13.5 likes |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 0.9 ′ × 0.9 ′ |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.024180 ± 0.000163 |
| Radial velocity | (7249 ± 49) km / s |
|
Stroke distance v rad / H 0 |
(331 ± 23) · 10 6 ly (101.6 ± 7.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 16, 1785 |
| Catalog names | |
| NGC 5808, 5819 • UGC 9609 • PGC 53251 • CGCG 337-023 • IRAS 14540 + 7319 • GC 4022 • H III 311 • | |
NGC 5808 = NGC 5819 is a 13.5 mag light barred spiral galaxy of the Hubble type SAB (rs) bc in the constellation Little Bear in the northern sky , which is an estimated 331 million light years away from the Milky Way .
It was discovered on March 16, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “vF, S, iR, between two pretty small stars, 6 ′ apart”. However, Herschel's position information was incorrect, so the observation of Heinrich Louis d'Arrest on October 6, 1861 under NGC 5819 led to a second entry in the catalog.