NGC 4819
| Galaxy NGC 4819 |
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|---|---|
![NGC 4819 & NGC 4821 (u) [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4819_-_SDSS_DR14.jpg)
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| NGC 4819 & NGC 4821 (u) SDSS image | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 56 m 27.860 s |
| declination | + 26 ° 59 ′ 14.40 ″ |
| Appearance | |
| Morphological type | (R ') SAB (r) a: / LINER |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.2 ′ × 0.8 ′ |
| Position angle | 160 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 1656 WBL 426 |
| Redshift | 0.021558 ± 0.000080 |
| Radial velocity | 6463 ± 24 km / s |
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Stroke distance v rad / H 0 |
(289 ± 20) x 10 6 ly (88.7 ± 6.2) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 6, 1785 |
| Catalog names | |
| NGC 4819 • UGC 8060 • PGC 44144 • CGCG 160-025 • MCG + 05-31-014 • 2MASX J12562784 + 2659150 • GC 3324 • H II 346 • h 1487 • GALEX MSC J125627.82 + 265914.2 • LDCE 926 NED024 • HOLM 490A | |
NGC 4819 is a 13.2 likes bright barred spiral galaxy with an active galactic nucleus from Hubble type SBa in the constellation Coma Berenices the northern sky . It is estimated to be 289 million light years from the Milky Way and about 105,000 light years across. Together with NGC 4821 , it forms the galaxy pair Holm 490 and is considered a member of the Coma galaxy cluster Abell 1656 .
The galaxies NGC 4827 , IC 835 , IC 3900 , IC 3913 are located in the same area of the sky .
The object was discovered on April 6, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “F, pL, irregular figure”.