NGC 4448
| Galaxy NGC 4448 |
|
|---|---|
|
|
| The galaxy NGC 4448 imaged by the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Berenike's hair |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 28 m 15.4 s |
| declination | + 28 ° 37 ′ 13 ″ |
| Appearance | |
| Morphological type | SB (r) ab / HII |
| Brightness (visual) | 11.2 mag |
| Brightness (B-band) | 12 likes |
| Angular expansion | 3.9 ′ × 1.4 ′ |
| Position angle | 94 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.002205 +/- 0.000020 |
| Radial velocity | 661 +/- 6 km / s |
|
Stroke distance v rad / H 0 |
(30 ± 2) x 10 6 ly (9.06 ± 0.64) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4448 • UGC 7591 • PGC 40988 • CGCG 158-113 • CGCG 159-002 • MCG + 05-29-89 • IRAS 12257 + 2853 • 2MASX J12281542 + 2837130 • GC 3001 • H I 91 • h 1280 • LDCE 0867 NED114 | |
NGC 4448 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SB (r) ab in the constellation Haar der Berenike in the northern sky , which is an estimated 30 million light years away from the Milky Way .
The object was discovered on April 11, 1785 by the astronomer William Herschel with the help of his 18.7 inch reflector telescope.