NGC 7154

NGC 7154
NGC 7154 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationPiscis Austrinus
Right ascension21h 55m 21.1700s[1]
Declination−34° 48′ 51.697″[1]
Redshift0.008726±0.000010[1]
Heliocentric radial velocity2,616±3 km/s[1]
Distance89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc)[2]
Group or clusterIC 5156 group (LGG 450)
Apparent magnitude (V)13.14[1]
Characteristics
TypeSB(s)m pec[1]
Size~86,400 ly (26.48 kpc) (estimated)[1]
Apparent size (V)2.1′ × 1.6′[1]
Other designations
ESO 404- G 008, IRAS 21523-3503, 2MASX J21552103-3448507, MCG -06-48-005, PGC 67641[1]

NGC 7154 is a peculiar barred spiral galaxy in the constellation of Piscis Austrinus. Its velocity with respect to the cosmic microwave background is 2,356±18 km/s, which corresponds to a Hubble distance of 105.3 ± 7.5 Mly (32.3 ± 2.3 Mpc).[1] However, eight non-redshift measurements give a closer mean distance of 89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc).[2] It was discovered by British astronomer John Herschel on 23 September 1834.[3]

NGC 7154 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[4][5]

IC 5156 group

NGC 7154 is a member of the IC 5156 group (also known as LGG 450[6]). This group contains 14 galaxies, including NGC 7163 [fr], NGC 7172, NGC 7173 [fr], NGC 7174 [fr], NGC 7176 [fr], NGC 7187 [fr], IC 5156 [fr], and six galaxies from the ESO catalogue.[7][8]

Supernova

One supernova has been observed in NGC 7154:

See also

References

  1. ^ a b c d e f g h i j "Results for object NGC 7154". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 April 2026.
  2. ^ a b "Distance Results for NGC 7154". NASA/IPAC Extragalactic Database. NASA. Retrieved 5 April 2026.
  3. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7154". Celestial Atlas. Retrieved 5 April 2026.
  4. ^ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
  5. ^ "NGC 7154". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 April 2026.
  6. ^ "General study of group membership. II. Determination of nearby groups". 19 November 1993.
  7. ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  8. ^ "LGG 450". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 April 2026.
  9. ^ "SN 2026hze". Transient Name Server. IAU. Retrieved 5 April 2026.
  • Wikimedia Commons logo Media related to NGC 7154 at Wikimedia Commons
  • NGC 7154 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images


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