NGC 5508

NGC 5508
The spiral galaxy NGC 5508.
Observation data (J2000 epoch)
Constellation	Boötes
Right ascension	14^h 12^m 29.0^s
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]

NGC 5508 and PGC 50725, an optical pair.

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.

See also

• List of NGC objects (5001–6000)

References

1. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-24.
2. "New General Catalog Objects: NGC 5500 - 5549". cseligman.com. Retrieved 2024-07-26.
3. "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2024-07-24.
4. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-24.

External links

• NGC 5508 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• NGC 5508 on the site of Professor C. Seligman
• NGC 5508 on the SEDS website
• NGC 5508 on the NASA/IPAC Extragalactic Database
• Media related to NGC 5508 at Wikimedia Commons