NGC 818
| Galaxy NGC 818 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 08 m 44.5 s |
| declination | + 38 ° 46 ′ 38 ″ |
| Appearance | |
| Morphological type | SBc |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 2.9 ′ × 1.2 ′ |
| Position angle | 113 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.014156 ± 0.000013 |
| Radial velocity | 4244 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(196 ± 14) · 10 6 ly (60.0 ± 4.2) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | October 18, 1786 |
| Catalog names | |
| NGC 818 • UGC 1633 • PGC 8185 • CGCG 522-116 • MCG + 06-05-086 • IRAS 02057 + 3832 • 2MASX J02084451 + 3846381 • GC 488 • H II 604 • h 194 • LDCE 0148 NED001 | |
NGC 818 is a barred spiral galaxy of the Hubble type SBbc in the constellation Andromeda. It is estimated to be 196 million light years away from the Milky Way and has a diameter of around 165,000 ly.
In the same area of the sky is the galaxy NGC 828 .
The type II supernova SN 1992az was observed here.
The object was discovered on October 18, 1786 by the astronomer William Herschel .