Wikipedia

NGC 6794

NGC 6794
NGC 6794 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationSagittarius
Right ascension19h 28m 03.8849s[1]
Declination−38° 55′ 07.297″[1]
Redshift0.020077±0.0000300[1]
Heliocentric radial velocity6,019±9 km/s[1]
Distance315.94 ± 1.96 Mly (96.867 ± 0.601 Mpc)[1]
Group or cluster[CHM2007] LDC 1344
Apparent magnitude (V)13.9[1]
Characteristics
TypeSA(rs)ab[1]
Size~229,700 ly (70.44 kpc) (estimated)[1]
Apparent size (V)1.7′ × 1.5′[1]
Other designations
ESO 338- G 005, 2MASX J19280388-3855077, MCG -07-40-001, PGC 63241[1]

NGC 6794 is a large spiral galaxy in the constellation of Sagittarius. Its velocity with respect to the cosmic microwave background is 5,887±13 km/s, which corresponds to a Hubble distance of 283.2 ± 19.8 Mly (86.83 ± 6.08 Mpc).[1] However, three non-redshift measurements give a farther mean distance of 315.94 ± 1.96 Mly (96.867 ± 0.601 Mpc).[2] It was discovered by British astronomer John Herschel on 24 August 1834.[3][4]

NGC 6794 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.[5][6]

NGC 6794 viewed through visible light

Galaxy group

[edit]

NGC 6794 is a member of a small galaxy group known as [CHM2007] LDC 1344, which includes the galaxies ESO 338-9 and ESO 338-7.[7][8]

Supernova

[edit]

One supernova has been observed in NGC 6794:

  • SN 2024dgn (Type Ia, mag. 15.719) was discovered by ATLAS on 26 February 2024.[9]

See also

[edit]

References

[edit]
  1. ^ a b c d e f g h i j k "Results for object NGC 6794". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 19 January 2026.
  2. ^ "Distance Results for NGC 6794". NASA/IPAC Extragalactic Database. NASA. Retrieved 19 January 2026.
  3. ^ Herschel, J. F. W (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London. 154: 1–137. Bibcode:1864RSPT..154....1H. doi:10.1098/rstl.1864.0001.
  4. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 6794". Celestial Atlas. Retrieved 19 January 2026.
  5. ^ 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.
  6. ^ "NGC 6794". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 January 2026.
  7. ^ "[CHM2007] LDC 1344". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 January 2026.
  8. ^ 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. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201.
  9. ^ "SN 2024dgn". Transient Name Server. IAU. Retrieved 19 January 2026.
[edit]
  • Media related to NGC 6794 at Wikimedia Commons
  • NGC 6794 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images