NGC 4748
| Galaxy NGC 4748 |
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|---|---|
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| NGC 4748 & 2MASX J12521292-1324388 (photo taken by the Hubble Space Telescope ) | |
| AladinLite | |
| Constellation | Crow |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 52 m 12.4 s |
| declination | -13 ° 24 ′ 53 ″ |
| Appearance | |
| Morphological type | Sa / Sy1 |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.6 mag |
| Angular expansion | 0.8 ′ × 0.7 ′ |
| Position angle | 45 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.014630 +/- 0.000110 |
| Radial velocity | 4386 +/- 33 km / s |
|
Stroke distance v rad / H 0 |
(191 ± 13) · 10 6 ly (58.5 ± 4.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 27, 1786 |
| Catalog names | |
| NGC 4748 • PGC 43643 • MCG -02-33-34 • IRAS 12495-1308 • 2MASX J12521245-1324528 • GC 3267 • H III 537 • h 1459 • LDCE 0921 NED023 | |
NGC 4748 is a spiral galaxy with an active nucleus of the Hubble type Sa in the constellation Raven south of the celestial equator . It is estimated to be 191 million light years from the Milky Way and about 50,000 ly in diameter. It forms an interacting pair with the galaxy 2MASX J12521292-1324388 .
The object was discovered on March 27, 1786 by the astronomer Wilhelm Herschel with the help of his 18.7 inch reflector telescope.
Individual evidence