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
The elliptical galaxy NGC 6685.
Observation data (J2000 epoch)
ConstellationLyra
Right ascension18h 39m 58.6429s[1]
Declination+39° 58′ 54.437″[1]
Redshift0.021905 [1]
Heliocentric 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' x 0.9'[1]
Other designations
2MASX J18395865+3958541, UGC 11317, MCG +07-38-015, PGC 62220, CGCG 228-021[1]

Two supernovae have been observed in NGC 6685: SN 2006bq (type Ia, mag 15.8)[3] and SN 2023ndu (type Ia, mag 18.5).[4]

See also

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References

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  1. ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 6685. Retrieved 6 August 2024.
  2. ^ Celestial Atlas entry for NGC 6685. Retrieved 6 August 2024.
  3. ^ Transient Name Server entry for SN 2006bq. Retrieved 6 August 2024.
  4. ^ Transient Name Server entry for SN 2023ndu. Retrieved 6 August 2024.
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