NGC 6685

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]

NGC 6685
NGC 6685 imaged by Sloan Digital Sky Survey
Observation data (J2000 epoch)
Constellation	Lyra
Right ascension	18h 39m 58.6199s[1]
Declination	+39° 58′ 54.581″[1]
Redshift	0.021905[1]
Heliocentric radial velocity	6567 ± 36 km/s[1]
Distance	309.4 ± 21.8 Mly (94.87 ± 6.68 Mpc)[1]
Apparent magnitude (V)	13.4[1]
Characteristics
Type	S0^-?[1]
Size	~141,400 ly (43.34 kpc) (estimated)[1]
Apparent size (V)	1.1′ × 0.9′[1]
Other designations
2MASX J18395865+3958541, UGC 11317, MCG +07-38-015, PGC 62220, CGCG 228-021[1]

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

• List of NGC objects (6001–7000)