NGC 819
| Galaxy NGC 819 |
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|---|---|
![NGC 819 with LEDA 212918 [1] (ru) SDSS image](https://de.wikipedia.org/wiki/Datei:NGC819_-_SDSS_DR14.jpg)
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| NGC 819 with LEDA 212918 (ru) SDSS image | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 08 m 34.5 s |
| declination | + 29 ° 14 ′ 05 ″ |
| Appearance | |
| Morphological type | S? |
| Brightness (visual) | 13.4 mag |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 0.6 ′ × 0.4 ′ |
| Position angle | 10 ° |
| Surface brightness | 11.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.021935 ± 0.000033 |
| Radial velocity | 5576 ± 10 km / s |
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Stroke distance v rad / H 0 |
(299 ± 21) · 10 6 ly (91.6 ± 6.4) Mpc |
| history | |
| discovery | Heinrich d'Arrest |
| Discovery date | 1865 |
| Catalog names | |
| NGC 819 • UGC 1632 • PGC 8174 • CGCG 504-017 • IRAS 02056 + 2859 • KUG 0205 + 289 • 2MASX J02083436 + 2914025 • GC 5216 • NVSS J020834 + 291357 • KIG 92 | |
NGC 819 is a galaxy of Hubble type S? in the constellation Triangle in the northern sky . It is estimated to be 299 million light years away from the Milky Way and has a diameter of around 50,000 ly.
In the same area of the sky are the galaxies NGC 807 and NGC 816 , among others .
The type IC supernova SN 2007hb was observed here.
The object was by astronomer d'Heinrich arrest in 1865 using a 28-cm - telescope discovered.