NGC 4198
| Galaxy NGC 4198 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 14 m 22.0 s |
| declination | + 56 ° 00 ′ 41 ″ |
| Appearance | |
| Morphological type | S0 / a / LINER |
| Brightness (visual) | 13.6 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 1 ′ × 0.6 ′ |
| Position angle | 130 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.031178 ± 0.000117 |
| Radial velocity | 9347 ± 35 km / s |
|
Stroke distance v rad / H 0 |
(421 ± 30) x 10 6 ly (129.2 ± 9.1) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 14, 1789 |
| Catalog names | |
| NGC 4198 • IC 778 • UGC 7246 • PGC 39090 • CGCG 269-045 • MCG + 09-20-123 • 2MASX J12142200 + 5600410 • GC 2792 • H II 793 • h 1139 • GALEX ASC J121422.06 + 560040.1 | |
NGC 4198 = IC 778 is a lenticular galaxy with an active nucleus of the Hubble type S0 / a in the constellation Great Bear in the northern sky . It is estimated to be 421 million light years from the Milky Way and about 125,000 light years across .
The galaxy NGC 4172 is located in the same area of the sky .
The object was discovered by Wilhelm Herschel on April 14, 1789 .