NGC 6440
NGC 6440 | |
---|---|
![]() The globular cluster NGC 6440 imaged by Hubble | |
Observation data (J2000 epoch) | |
Class | V |
Constellation | Sagittarius |
Right ascension | 17h 48m 52.7s[1] |
Declination | −20° 21′ 36.9″[1] |
Distance | 27.7 kly (8.5 kpc)[2] |
Apparent magnitude (V) | 10.10[2] |
Physical characteristics | |
Radius | 3.15' x 3.15'[1] |
Metallicity | = -0.36[3] dex |
Other designations | GCl 77, 1FGL J1748.7-2020, MXB 1746-20[2] |
NGC 6440 is a globular cluster in the constellation Sagittarius and was discovered by William Herschel on 28 May 1786. It has an apparent magnitude of about 10, with a diameter of about 6 arcminutes, and its Shapley–Sawyer Concentration Class is V.[1]
References[]
- ^ a b c d "NGC 6440". Retrieved 19 December 2019.
- ^ a b c "NGC 6440". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 January 2017.
- ^ "A Galactic Globular Clusters Database: NGC 6440". Retrieved 8 January 2017.
External links[]
Categories:
- Star cluster stubs
- Globular clusters
- Sagittarius (constellation)
- NGC objects