| NGC 5508 | |
|---|---|
 The spiral galaxy NGC 5508. | |
| Observation data (J2000 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 12m 29.0s |
| Declination | 24° 38′ 08″ |
| Redshift | 0.038019 ± 0.000009 |
| Heliocentric radial velocity | 11,398 km/s |
| Distance | 559 Mly (171.32 Mpc) |
| Apparent magnitude (V) | 13.8 |
| Apparent magnitude (B) | 14.8 |
| Surface brightness | 13.66 mag/am |
| Characteristics | |
| Type | S0, S(rs)b? pec |
| Size | 352,000 ly (107.99 kpc) |
| Apparent size (V) | 1.1' x 0.8' |
| Other designations | |
| PGC 50741, UGC 9094, MCG +04-34-002, CGCG 133-009 | |
NGC 5508 is a very large and distant spiral galaxy located in the constellation Boötes. Its velocity relative to the cosmic microwave background is 11,615 ± 15 km/s, which corresponds to a Hubble's law of 171 ± 12 Mpc (∼558 million light-years).[1] It was discovered by French astronomer Édouard Stephan in 1882.
This galaxy is classified by all sources consulted, except Professor Seligman, as a lenticular galaxy. However, the image obtained from the SDSS survey clearly shows that it is a spiral galaxy.[2]
According to the Simbad database, NGC 5508 is a LINER galaxy, i.e. a galaxy whose nucleus exhibits an emission spectrum characterized by broad lines of weakly ionized atoms.[3]
The Hubble distance of neighboring galaxy PGC 50725 is 237.51 ± 16.63 Mpc (∼775 million light-years),[4] well beyond NGC 5508. Although they appear as neighbors on the celestial sphere, they do not form a physical galaxy pair.
- ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-24.
- ^ "New General Catalog Objects: NGC 5500 - 5549". cseligman.com. Retrieved 2024-07-26.
- ^ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2024-07-24.
- ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-24.