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) | |
| Constellation | Lyra |
| Right ascension | 18h 39m 58.6429s[1] |
| Declination | +39° 58′ 54.437″[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' 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
editReferences
edit- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 6685. Retrieved 6 August 2024.
- ^ Celestial Atlas entry for NGC 6685. Retrieved 6 August 2024.
- ^ Transient Name Server entry for SN 2006bq. Retrieved 6 August 2024.
- ^ Transient Name Server entry for SN 2023ndu. Retrieved 6 August 2024.
External links
edit
Media related to NGC 6685 at Wikimedia Commons- NGC 6685 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
