NGC 6685

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

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]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k "Results for object NGC 6685". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 6 August 2024.
^ Seligman, Courtney. "New General Catalogue Objects: NGC 6685". Celestial Atlas. Retrieved 15 December 2024.
^ Puckett, T.; Pelloni, A.; Sostero, G.; Sehgal, A.; Gagliano, R.; Luckas, P.; Trondal, O.; Schwartz, M.; Li, W.; Lee, E.; Baek, M.; Madison, D. R.; Holmes, R.; Devore, H.; Graves, B. (2006). "Supernovae 2006bq-2006bx". International Astronomical Union Circular (8705): 1. Bibcode:2006IAUC.8705....1P.
^ "SN 2006bq". Transient Name Server. IAU. Retrieved 15 December 2024.
^ "SN 2023ndu". Transient Name Server. IAU. Retrieved 15 December 2024.