NGC 4685
| Galaxy NGC 4685 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Berenike's hair |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 47 m 11.4 s |
| declination | + 19 ° 27 ′ 52 ″ |
| Appearance | |
| Morphological type | S0-: / RET |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 2.0 ′ × 1.2 ′ |
| Position angle | 155 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.022646 ± 0.000067 |
| Radial velocity | 6789 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(302 ± 21) · 10 6 ly (92.7 ± 6.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 27, 1785 |
| Catalog names | |
| NGC 4685 • UGC 7954 • PGC 43143 • MCG + 03-33-004 • 2MASX J12471143 + 1927520 • GC 3215 • H III 398 • h 1427 • SDSS J124711.44 + 192751.6 • USGC U504 NED01 • 2MIG 1775 | |
NGC 4685 is a 12.7 mag bright elliptical galaxy of the Hubble type E / S0 in the constellation Haar der Berenike in the northern sky . It is an estimated 302 million light years from the Milky Way and about 180,000 light years in diameter.
In the same area of the sky are u. a. the galaxies IC 3744 , IC 3766 , IC 3784 , IC 3785 .
The object was discovered on April 27, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "vF, vS, resolvable".