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NGC 997

Summary

NGC 997 is an interacting galaxy in the constellation of Cetus. The galaxy was discovered by Albert Marth on 10 November 1863.[3] It has a regularly rotating central molecular gas disk, containing a black hole of between 4 x 107 and 1.8 x 109 solar masses.[4] Its speed relative to the cosmological background is 6,270 ± 45 km/s, corresponding to a Hubble distance of 92.5 ± 6.5 Mpc (~302 million ly).[5]

NGC 997
NGC 997 and its neighbouring galaxies captured by SDSS
Observation data (J2000 epoch)
ConstellationCetus
Right ascension02h 37m 14.50s
Declination±07° 18′ 28″
Redshift0.021688
Heliocentric radial velocity6504 km/s
Distance86.92 Mpc
Group or cluster[CHM2007] HDC 157, [CHM2007] LDC 181, [T2015] nest 200334
Characteristics
TypeE[1]
Other designations
NGC 997, MCG+01-07-016, Z 414-27, [CHM2007] LDC 181 J023714.47+0718201, IRAS F02345+0705, NPM1G +07.0083, Z 0234.6+0705, LEDA 9932, UGC 2102, [CCA99] UGC 2102b, 2MASX J02371447+0718201, UZC J023714.4+071822, [CHM2007] HDC 157, J023714.47+0718201
References: [2][1]

NGC 997 is accompanied by PGC 200205 also designated as NGC 997 NED01,[6] a compact galaxy. No data is available for the latter galaxy. So, this pair may be due to an optical alignment, or they may be two gravitationally interacting galaxies about to merge.

See also edit

References edit

  1. ^ a b "NGC 997". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-08-23.
  2. ^ http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+0997&img_stamp=YES&list_limit=9&extend=no
  3. ^ Seligman, Courtney. "New General Catalogue objects: NGC 950 - 999". cseligman.com. Retrieved 2021-08-23.
  4. ^ Dominiak, Pandora; Bureau, Martin; Davis, Timothy A; Ma, Chung-Pei; Greene, Jenny E; Gu, Meng (2024-01-31). "The MASSIVE survey - XIX. Molecular gas measurements of the supermassive black hole masses in the elliptical galaxies NGC 1684 and NGC 0997". Monthly Notices of the Royal Astronomical Society. arXiv:2401.16376. doi:10.1093/mnras/stae314. ISSN 0035-8711.
  5. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-03-04.
  6. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-03-04.

External links edit

  •   Media related to NGC 997 at Wikimedia Commons