NGC 7317 is an elliptical galaxy that is a member of Stephan's Quintet in the constellation Pegasus. Its velocity with respect to the cosmic microwave background is 6272 ± 35 km/s, which corresponds to a Hubble distance of 301.7 ± 21.2 Mly (92.51 ± 6.51 Mpc).[1] In addition, four non-redshift measurements gives a distance of 294.27 ± 34.22 Mly (90.225 ± 10.491 Mpc).[2] It was discovered on 27 September 1873 by French astronomer Édouard Stephan.[3]
The SIMBAD database lists NGC 7317 as a Seyfert II Galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4]
The James Webb Space Telescope photographed it as part of Stephan's Quintet; the image was released on 12 July 2022.
See also
References
- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for object NGC 7317. Retrieved 2007-04-21.
- ^ "Distance Results for NGC 7317". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 11 December 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7317". Celestial Atlas. Retrieved 27 August 2024.
- ^ "NGC 7317". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 December 2024.
External links
Media related to NGC 7317 at Wikimedia Commons- NGC 7317 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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