NGC 4999
| Galaxy NGC 4999 |
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|---|---|
![NGC 4999 & LEDA 1203287 (above) [1] SDSS](https://de.wikipedia.org/wiki/Datei:NGC4999_-_SDSS_DR14.jpg)
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| NGC 4999 & LEDA 1203287 (above) SDSS | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 13 h 09 m 33.1 s |
| declination | + 01 ° 40 ′ 23 ″ |
| Appearance | |
| Morphological type | SB (r) b / Seyfert 2 |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 2.3 ′ × 1.9 ′ |
| Position angle | 128 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.018836 ± 0.000027 |
| Radial velocity | 5647 ± 8 km / s |
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Stroke distance v rad / H 0 |
(250 ± 18) x 10 6 ly (76.5 ± 5.4) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | February 24, 1786 |
| Catalog names | |
| NGC 4999 • UGC 8236 • PGC 45632 • CGCG 016-012 • MCG + 00-34-010 • IRAS 13069 + 0156 • 2MASX J13093312 + 0140233 • GC 3432 • H II 537 • h 1543 • GALEX ASC J130933.23 + 014022.7 • 2MIG 1820 | |
NGC 4999 is a 12.2 mag bright bar-spiral galaxy with an active hubble-type SBb galaxy core in the constellation of Virgo on the ecliptic . It is estimated to be 250 million light years away from the Milky Way and has a diameter of around 170,000 ly.
In the same area of the sky are the galaxies NGC 4991 and NGC 4996 .
The object was discovered on February 24, 1786 by Wilhelm Herschel with an 18.7-inch reflecting telescope, who described it as "F, pL, iR, easily resolvable".