NGC 4173
| Galaxy NGC 4173 |
|
|---|---|
|
|
| The galaxies NGC 4169, NGC 4173, NGC 4174 and NGC 4175 (from right to left, NGC 4173 is at the top right), recorded with a 60 cm telescope; together they form the HGC 61 . | |
| AladinLite | |
| Constellation | Berenike's hair |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 12 m 21.4 s |
| declination | + 29 ° 12 ′ 25 ″ |
| Appearance | |
| Morphological type | Scd |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 5.0 '× 0.7' |
| Position angle | 134 ° |
| Surface brightness | 13.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.003759 +/- 0.000067 |
| Radial velocity | 1127 +/- 20 km / s |
|
Stroke distance v rad / H 0 |
(50 ± 4) x 10 6 ly (15.4 ± 1.1) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4173 • UGC 7204 • PGC 38897 • CGCG 158-043 • MCG + 05-29-033 • KUG 1209 + 294A • HCG 61B • GC 2771 • H II 372 • h 1121 • FGC 1382 | |
NGC 4173 is a spiral galaxy of Hubble type Scd in the constellation Coma Berenices the northern sky . It is estimated to be 50 million light years away from the Milky Way and has a diameter of around 75,000 ly.
Together with NGC 4169 , NGC 4174 and NGC 4175 , it forms the Hickson Compact Group 61.
The object was discovered on April 11, 1785 by the German-British astronomer William Herschel .
Web links
Commons : NGC 4173 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Spektrum.de : Amateur recordings [1]