NGC 254

NGC 254 is a lenticular galaxy located in the constellation Sculptor. It was discovered by John Herschel in 1834.[4] It is in a galaxy group with NGC 134.[3]

NGC 254
DECam image of NGC 254
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension00h 47m 27.595s[1]
Declination−31° 25′ 18.11″[1]
Redshift0.005434[2]
Heliocentric radial velocity1629[2]
Distance55.8 Mly (17.10 Mpc)[2]
Apparent magnitude (V)11.82[1]
Apparent magnitude (B)11.62[1]
Characteristics
Type(R)SA(rl)0+[3]
Apparent size (V)2.6′ × 1.7′[4]
Other designations
MCG-05-03-005, PGC 2778

NGC 254 is an example of a ring galaxy, a galaxy with a ring,[3] and in this case, no central bar. Across the entire galaxy disk, there is a disk of ionized gas rotating in the direction opposite the stellar disk's rotation.[3] This situation may have arose when a retrograde-orbiting satellite galaxy accreted onto the galaxy itself, some 1 billion years ago.[3]

See also

References
  1. "NGC 254". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 February 2017.
  2. "NASA/IPAC Extragalactic Database". Results for NGC 254. Retrieved 2 September 2016.
  3. Katkov, Ivan Yu.; Kniazev, Alexei Yu.; Sil'Chenko, Olga K.; Gasymov, Damir (2022). "Star formation in outer rings of S0 galaxies. IV. NGC 254: A double-ringed S0 with gas counter-rotation". Astronomy & Astrophysics. 658: A154. arXiv:2112.03289. Bibcode:2022A&A...658A.154K. doi:10.1051/0004-6361/202141934. S2CID 245728982.
  4. "New General Catalog Objects: NGC 250 - 299". cseligman.com. Retrieved 12 February 2017.
  • Media related to NGC 254 at Wikimedia Commons


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