NGC 5704
| Galaxy NGC 5704 / NGC 5708 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Bear keeper |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 14 h 38 m 16.3 s |
| declination | + 40 ° 27 ′ 24 ″ |
| Appearance | |
| Morphological type | Sd |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 1.6 ′ × 0.6 ′ |
| Position angle | 177 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.009176 +/- 0.000057 |
| Radial velocity | 2751 +/- 17 km / s |
|
Stroke distance v rad / H 0 |
(128 ± 9) x 10 6 ly (39.1 ± 2.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 18, 1787 |
| Catalog names | |
| NGC 5704, 5708 • UGC 9430 • PGC 52315 • CGCG 220-042 • MCG + 07-30-44 • IRAS 14363 + 4040 • GC 3959 • H II 649 • h 1855 • | |
NGC 5704 = NGC 5708 is a 13.3 mag bright spiral galaxy of the Hubble type Sd in the constellation Bear Keeper and about 128 million light years from the Milky Way. It was discovered on March 18, 1787 by Wilhelm Herschel with an 18.7-inch reflecting telescope, who described it as "F, S, E nearly in the meridian, resolvable".
Why the observation by John Herschel on May 12th, 1828, when he said for a “ nova ” at an almost identical position “F, pL, E nearly in merid .; gbM ”, which led to a second entry in the catalog under NGC 5708 , has not yet been clarified.