NGC 5291

NGC 5291
NGC 5291 image from ESO’s Very Large Telescope at the Paranal Observatory.
Observation data (J2000 epoch)
ConstellationCentaurus
Right ascension13h 47m 24.5087s[1]
Declination−30° 24′ 25.603″[1]
Redshift0.014602±0.000019[1]
Heliocentric radial velocity4,378±6 km/s[1]
Distance177.43 ± 9.78 Mly (54.400 ± 3.000 Mpc)[1]
Apparent magnitude (V)15.1[1]
Characteristics
TypeE pec[1]
Size~85,300 ly (26.16 kpc) (estimated)[1]
Apparent size (V)1.1′ × 0.7′[1]
Other designations
ESO 445- G 030, MCG -05-33-006, PGC 48893[1]

NGC 5291 is a system of interacting galaxies in the constellation Centaurus. Its velocity with respect to the cosmic microwave background is 4,648±20 km/s, which corresponds to a Hubble distance of 223.6 ± 15.7 Mly (68.55 ± 4.81 Mpc).[1] However, two non-redshift measurements give a closer mean distance of 177.43 ± 9.78 Mly (54.400 ± 3.000 Mpc).[2] It was discovered by British astronomer John Herschel on 8 May 1834.[3]

NGC 5291 is surrounded by a collisional ring, containing a young and star-forming tidal dwarf galaxy,[4] where dark matter has been detected.[5] It is also 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.[6]

See also

References

  1. ^ a b c d e f g h i j k "Results for object NGC 5291". NASA/IPAC Extragalactic Database. Retrieved 2007-04-03.
  2. ^ "Distance Results for NGC 5291". NASA/IPAC Extragalactic Database. NASA. Retrieved 27 October 2025.
  3. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 5291". Celestial Atlas. Retrieved 27 October 2025.
  4. ^ Médéric Boquien; Pierre-Alain Duc; Jonathan Braine; Elias Brinks; et al. (2007). "Polychromatic view of intergalactic star formation in NGC 5291". Astronomy & Astrophysics. 467 (1): 93–106. arXiv:astro-ph/0703002. Bibcode:2007A&A...467...93B. doi:10.1051/0004-6361:20066692. S2CID 5822678.
  5. ^ Frédéric Bournaud; Pierre-Alain Duc; Elias Brinks; Médéric Boquien; et al. (2007). "Missing Mass in Collisional Debris from Galaxies". Science. 316 (5828): 1166–1169. arXiv:0705.1356. Bibcode:2007Sci...316.1166B. doi:10.1126/science.1142114. PMID 17495138. S2CID 20946839.
  6. ^ "NGC 5291". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 October 2025.


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