NGC 4704
| Galaxy NGC 4704 |
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|---|---|
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| SDSS | |
| AladinLite | |
| Constellation | Hunting dogs |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 48 m 46.4 s |
| declination | + 41 ° 55 ′ 17 ″ |
| Appearance | |
| Morphological type | SBbc / pec / HII / Sy2 |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 1.0 ′ × 0.9 ′ |
| Position angle | 105 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.027132 ± 0.000060 |
| Radial velocity | 8134 ± 18 km / s |
|
Stroke distance v rad / H 0 |
(366 ± 26) x 10 6 ly (112.2 ± 7.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 9, 1787 |
| Catalog names | |
| NGC 4704 • UGC 7972 • PGC 43288 • CGCG 216-031 • MCG + 07-26-054 • IRAS 12464 + 4211 • 2MASX J12484638 + 4155166 • Mrk 228 • GC 3233 • H II 662 • h 1439 • NVSS J124846 + 415517 | |
NGC 4704 is an active bar-spiral galaxy with extensive star formation regions of the Hubble type SBbc in the constellation of the hounds in the northern sky . It is estimated to be 366 million light years from the Milky Way and about 105,000 ly in diameter.
The Type Ia / P supernova SN 1998ab was observed here.
The object was discovered on April 9, 1787 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "F, S, R, bM".