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]
Its chemical composition is highly peculiar, being highly (to nearly solar levels) enriched in alpha elements, suggesting an extragalactic origin before being captured by the Milky Way.[6]
^Mucciarelli, A.; Bellazzini, M.; Catelan, M.; Dalessandro, E.; Amigo, P.; Correnti, M.; Cortés, C.; d'Orazi, V. (2013), "NGC 5694: Another foster son of the Galactic halo★", Monthly Notices of the Royal Astronomical Society, 435 (4): 3667–3680, arXiv:1308.6653, doi:10.1093/mnras/stt1558