Astronomy:NGC 6769

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NGC 6769
NGC 6769 (right) with NGC 6770 (left) imaged by ESO's Very Large Telescope
Observation data (J2000 epoch)
ConstellationPavo
Right ascension 19h 18m 22.5975s[1]
Declination−60° 30′ 03.208″[1]
Redshift0.012886±0.000127[1]
Helio radial velocity3,863±38 km/s[1]
Distance183.2 ± 13.1 Mly (56.16 ± 4.01 Mpc)[1]
Group or clusterIC 4845 group (LGG 427)[2][3]
Apparent magnitude (V)12.55[1]
Characteristics
TypeSAB(r)b pec[1]
Size~384,500 ly (117.90 kpc) (estimated)[1]
Apparent size (V)2.3′ × 1.5′[1]
Other designations
The Devil's Mask, ESO 141-IG 048, PGC 63042[1]

NGC 6769 is a peculiar spiral galaxy in the constellation of Pavo. Its velocity with respect to the cosmic microwave background is 3,807±38 km/s, which corresponds to a Hubble distance of 183.2 ± 13.1 Mly (56.16 ± 4.01 Mpc).[1] It was discovered by British astronomer John Herschel on 11 August 1836.[4][5]

NGC 6769 along with NGC 6770 are listed as VV 304 in the catalog of Vorontsov-Vel'yaminov Interacting Galaxies.[6] Together with NGC 6771, the grouping of the 3 galaxies is sometimes called "The Devil's Mask."[5][7]

IC 4845 group

NGC 6769 is a member of the IC 4845 galaxy group (also known as LGG 427), which contains 14 members, including NGC 6739, NGC 6746, NGC 6770, NGC 6782, IC 4827, IC 4828, IC 4831, IC 4838, IC 4842, IC 4845, IC 4866, and ESO 141-21.[2][3]

Supernovae

Two supernovae have been observed in NGC 6769:

  • SN 1997de (Type Ia, mag. 18.2) was discovered by Alexander Wassilieff, and independently by Brendan Downs, on 27 August 1997.[8][9]
  • SN 2006ox (type unknown, mag. 15.3) was discovered by Libert "Berto" Monard on 26 November 2006.[10][11]

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 6769". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6769. 
  2. ↑ 2.0 2.1 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. 
  3. ↑ 3.0 3.1 "LGG 427". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+427. 
  4. ↑ Herschel, J. F. W (1864). "Catalogue of Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London 154: 1–137. doi:10.1098/rstl.1864.0001. Bibcode: 1864RSPT..154....1H. 
  5. ↑ 5.0 5.1 Seligman, Courtney. "New General Catalogue Objects: NGC 6769". https://cseligman.com/text/atlas/ngc74a.htm#7456. 
  6. ↑ Vorontsov-Velyaminov, B.A. (1959). Atlas and Catalogue of interacting galaxies. Part 1.. Moscow: SAI. OCLC 657642954. http://ned.ipac.caltech.edu/level5/VV_Cat/frames.html. 
  7. ↑ 7.0 7.1 "Cosmic Ballet or Devil's Mask?". European Southern Observatory Press Release. 28 April 2004. Bibcode: 2004eso..presP..12.. https://www.eso.org/public/news/eso0413/. Retrieved 29 August 2025. 
  8. ↑ Wassilieff, A.; Schmidt, B.; Evans, R.; Downs, B.; Suntzeff, N.; Maza, J.; Phillips, M. (1997). "Supernova 1997de in NGC 6769". International Astronomical Union Circular (6725): 1. Bibcode: 1997IAUC.6725....1W. http://www.cbat.eps.harvard.edu/iauc/06700/06725.html#Item1. 
  9. ↑ "SN 1997de". IAU. https://www.wis-tns.org/object/1997de. 
  10. ↑ Monard, L. A. G.; Joubert, N.; Prasad, R. R.; Li, W.; Itagaki, K.; Nakano, S.; Frieman, J.; Naito, H. et al. (2006). "Supernovae 2006nq and 2006ox-2006qr". International Astronomical Union Circular (8782): 1. Bibcode: 2006IAUC.8782....1M. http://www.cbat.eps.harvard.edu/iauc/08700/08782.html#Item1. 
  11. ↑ "SN 2006ox". IAU. https://www.wis-tns.org/object/2006ox. 

Coordinates: Sky map 19h 18m 22.5975s, −60° 30′ 03.208″



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