Astronomy:NGC 6919

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NGC 6919
NGC 6919 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationMicroscopium
Right ascension 20h 31m 38.0818s[1]
Declination−44° 12′ 58.881″[1]
Redshift0.022109±0.0000270[1]
Helio radial velocity6,628±8 km/s[1]
Distance246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc)[1]
Group or cluster[CHM2007] LDC 1408
Apparent magnitude (V)13.58[1]
Characteristics
TypeSAB(s)c[1]
Size~150,500 ly (46.14 kpc) (estimated)[1]
Apparent size (V)1.7′ × 1.2′[1]
Other designations
ESO 285- G 027, IRAS 20282-4423, MCG-07-42-011, PGC 64883[1]

NGC 6919 is an intermediate spiral galaxy in the constellation of Microscopium. Its velocity with respect to the cosmic microwave background is 6,458±14 km/s, which corresponds to a Hubble distance of 310.7 ± 21.8 Mly (95.25 ± 6.67 Mpc).[1] However, 12 non-redshift measurements give a closer mean distance of 246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc).[2] It was discovered by British astronomer John Herschel on 2 September 1836.[3]

NGC 6919 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]

LDC 1408 Group

NGC 6919 is a member of a small group of galaxies known as [CHM2007] LDC 1408. The other four galaxies in the group are MCG -07-42-016, ESO 285-40, ESO 285-32, and ESO 285-31.[6][7]

Supernova

One supernova has been observed in NGC 6919:

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 6919". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6919. 
  2. ↑ "Distance Results for NGC 6919". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6919. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6919". https://cseligman.com/text/atlas/ngc69.htm#6919. 
  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 6919". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6919. 
  6. ↑ "[CHM2007 LDC 1408"]. SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%5BCHM2007%5D+LDC+1408. 
  7. ↑ Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal 655 (2): 790–813. doi:10.1086/510201. Bibcode: 2007ApJ...655..790C. 
  8. ↑ "SN 2025ezt". IAU. https://www.wis-tns.org/object/2025ezt. 

Coordinates: Sky map 20h 31m 38.0818s, −44° 12′ 58.881″



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