Astronomy:NGC 6685

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NGC 6685
NGC 6685 imaged by Sloan Digital Sky Survey
Observation data (J2000 epoch)
ConstellationLyra
Right ascension 18h 39m 58.6199s[1]
Declination+39° 58′ 54.581″[1]
Redshift0.021905[1]
Helio radial velocity6567 ± 36 km/s[1]
Distance309.4 ± 21.8 Mly (94.87 ± 6.68 Mpc)[1]
Apparent magnitude (V)13.4[1]
Characteristics
TypeS0^-?[1]
Size~141,400 ly (43.34 kpc) (estimated)[1]
Apparent size (V)1.1′ × 0.9′[1]
Other designations
UGC 11317, MCG+07-38-015, PGC 62220[1]

NGC 6685 is an elliptical galaxy in the constellation of Lyra. Its velocity with respect to the cosmic microwave background is 6432 ± 37 km/s, which corresponds to a Hubble distance of 94.87 ± 6.68 Mpc (~310 million light-years).[1] It was discovered by American astronomer Edward Swift on 29 May 1887.[2]

Supernovae

Two supernovae have been observed in NGC 6685:

  • SN 2006bq (Type Ia, mag. 15.8) was discovered by Tim Puckett and A. Pelloni on 23 April 2006.[3][4]
  • SN 2023ndu (Type Ia, mag. 18.4555) was discovered by the Automatic Learning for the Rapid Classification of Events (ALeRCE) on 14 July 2023.[5]

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 6685". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6685. 
  2. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6685". https://cseligman.com/text/atlas/ngc66a.htm#6685. 
  3. ↑ Puckett, T.; Pelloni, A.; Sostero, G.; Sehgal, A.; Gagliano, R.; Luckas, P.; Trondal, O.; Schwartz, M. et al. (2006). "Supernovae 2006bq-2006bx". International Astronomical Union Circular (8705): 1. Bibcode: 2006IAUC.8705....1P. http://www.cbat.eps.harvard.edu/iauc/08700/08705.html#Item1. 
  4. ↑ "SN 2006bq". IAU. https://www.wis-tns.org/object/2006bq. 
  5. ↑ "SN 2023ndu". IAU. https://www.wis-tns.org/object/2023ndu. 



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