NGC 6440
| NGC 6440 | |
|---|---|
 The globular cluster NGC 6440 imaged by the Hubble Space Telescope | |
| 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] |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
NGC 6440 is a globular cluster in the constellation Sagittarius discovered by William Herschel on 28 May 1786. It has an apparent magnitude of around 10, with a diameter of about 6 arcminutes, and its Shapley–Sawyer Concentration Class is V.[1]
References[edit]
- ^ 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[edit]
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