Astronomy:NGC 7154

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NGC 7154
NGC 7154 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationPiscis Austrinus
Right ascension 21h 55m 21.1700s[1]
Declination−34° 48′ 51.697″[1]
Redshift0.008726±0.000010[1]
Helio 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, 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. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 7154". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+7154. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 7154". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+7154. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7154". https://cseligman.com/text/atlas/ngc71a.htm#7154. 
  4. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D. et al. (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. doi:10.1093/mnras/staa766. Bibcode: 2020MNRAS.494.1784A. 
  5. ↑ "NGC 7154". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7154. 
  6. ↑ "General study of group membership. II. Determination of nearby groups.". 19 Nov 1993. https://cdsarc.cds.unistra.fr/ftp/J/A+AS/100/47/table2.dat#:~:text=LGG%20450%20PGC67641,321154%20L%202655%2B. 
  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. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+450. 
  9. ↑ "SN 2026hze". IAU. https://www.wis-tns.org/object/2026hze. 

Coordinates: Sky map 21h 55m 21.1700s, −34° 48′ 51.697″



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