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.
See also
References
- ^ "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.
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
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