NGC 820
| Galaxy NGC 820 |
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|---|---|
![NGC 820 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC820_-_SDSS_DR14.jpg)
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| NGC 820 SDSS image | |
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 08 m 24.980 s |
| declination | + 14 ° 20 ′ 58.40 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 1.4 ′ × 0.8 ′ |
| Position angle | 72 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 820 group LGG 48 |
| Redshift | 0.014737 ± 0.000017 |
| Radial velocity | 4418 ± 5 km / s |
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Stroke distance v rad / H 0 |
(201 ± 14) · 10 6 ly (61.5 ± 4.3) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | September 7, 1828 |
| Catalog names | |
| NGC 820 • UGC 1629 • PGC 8165 • CGCG 438-031 • MCG + 02-06-36 • IRAS 02057 + 1406 • 2MASX J02082498 + 1420589 • GC 489 • h 195 • GALEX ASC J020824.97 + 142058.4 • HIPASS J0208 + 14 • WISEA J020825.00 + 142058.6 | |
NGC 820 is a spiral galaxy of Hubble type Sb in the constellation Aries on the ecliptic . It is estimated to be 201 million light-years from the Milky Way and about 85,000 light-years across. The galaxy is the brightest member of the NGC 820 group ( LGG 48 ).
In the same area of the sky is u. a. the galaxy IC 1780 .
The Type IIn supernova SN 2002ea was observed here.
The object was by astronomer John Herschel using on September 7, 1828 a 18.7-inch - telescope discovered.
NGC 820 group ( LGG 48 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 820 | PGC 8165 | 201 |
| PGC 8163 | UGC 1630 | 201 |
| PGC 8406 | UGC 1689 | 200 |