NGC 5548
| Galaxy NGC 5548 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Bear keeper |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 14 h 17 m 59.5 s |
| declination | + 25 ° 08 ′ 12 ″ |
| Appearance | |
| Morphological type | (R ') SA (s) 0 / a Sy1.5 |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 1.5 ′ × 1.2 ′ |
| Position angle | 110 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 381 |
| Redshift | 0.017175 ± 0.000023 |
| Radial velocity | (5149 ± 7) km / s |
|
Stroke distance v rad / H 0 |
(239 ± 16) x 10 6 ly (73.2 ± 5.0) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | May 19, 1784 |
| Catalog names | |
| NGC 5548 • UGC 9149 • PGC 51074 • CGCG 133-025 • MCG + 04-34-013 • IRAS 14156 + 2522 • KUG 1415 + 253 • 2MASX J14175951 + 2508124 • Mrk 1509 • GC 3838 • H II 194 • h 1773 • | |
NGC 5548 is a Seyfert galaxy of type 1 with a bluish-white glowing, very compact core. Its spectrum shows absorption phenomena in the UV and X-ray range , which are characteristic of gas flowing out at high speed. NGC 5548 is one of the best studied Seyfert galaxies.
Image of the center of NGC 5548 using the Hubble Space Telescope
The object was bought on May 19, 1784 by William Herschel .