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NGC 7317

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Galaxy in the constellation Pegasus
NGC 7317
NGC 7317 imaged by the James Webb Space Telescope
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension22 35 51.8674
Declination+33° 56′ 41.765″
Redshift0.022012
Heliocentric radial velocity6599 ± 26 km/s
Distance301.7 ± 21.2 Mly (92.51 ± 6.51 Mpc)
Apparent magnitude (V)14.57
Characteristics
TypeE4
Size~107,700 ly (33.03 kpc) (estimated)
Apparent size (V)0.4′ x 0.4′
Other designations
Stephan's Quintet NED01, HCG 92E, HOLM 792D, Arp 319, UGC UGC 12100, MCG +06-49-038, PGC 69256, CGCG 514-060, VV 288d

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). In addition, four non-redshift measurements gives a distance of 294.27 ± 34.22 Mly (90.225 ± 10.491 Mpc).It was discovered on 27 September 1873 by French astronomer Édouard Stephan.

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.

The James Webb Space Telescope photographed it as part of Stephan's Quintet; the image was released on 12 July 2022.

See also

References

  1. ^ "NASA/IPAC Extragalactic Database". Results for object NGC 7317. Retrieved 2007-04-21.
  2. "Distance Results for NGC 7317". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 11 December 2024.
  3. Seligman, Courtney. "New General Catalogue Objects: NGC 7317". Celestial Atlas. Retrieved 27 August 2024.
  4. "NGC 7317". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 December 2024.

External links


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