# NGC 5694

NGC 5694
The core of NGC 5694 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Class VII[1]
Constellation Hydra
Right ascension 14h 39m 36.5s[2]
Declination −26° 32′ 18.0″[2]
Distance 114,100ly[1]
Apparent magnitude (V) 10.2[1]
Apparent dimensions (V) 3.6′[1]
Physical characteristics
Metallicity ${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = –1.74[3] dex
Estimated age 13.44 Gyr[3]
Other designations Caldwell 66

NGC 5694 (also known as Caldwell 66) is a globular cluster in the constellation Hydra. It was discovered in 1784 by William Herschel.

## Characteristics

This globular cluster is located at a distance of 114,000 light-years (35,000 pc) from the Sun and 96,000 light-years (29,000 pc) from the Galactic center[4] and is one of the oldest known globular clusters in the Milky Way Galaxy, forming nearly 12 billion years ago.[5]

## References

1. ^ a b c d "Results for NGC 5694". SEDS NGC Catalog Online. Retrieved 2010-12-07.
2. ^ a b "NGC 5694". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-12-07.
3. ^ a b Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society, 404 (3): 1203–1214, arXiv:, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x.
4. ^ Harris, W.E. (1996). "A Catalog of Parameters for Globular Clusters in the Milky Way". AJ. 112: 1487. Bibcode:1996AJ....112.1487H. doi:10.1086/118116.
5. ^ "NGC/IC Project". Results for NGC 5694. Archived from the original on 2012-05-20. Retrieved 2010-12-07.