IC 4499
IC 4499 is a loose globular cluster in the constellation Apus. It is located in the medium-far galactic halo. Its apparent magnitude is 9.76, and was thought to unusual because it appears to be 3-4 billion years younger than most other globular clusters in the Milky Way, as determined by metallicity measurements in 1995. However, this was contradicted in 2011 by results that yielded a much older age of 12 billion years. As typical for very old globular clusters, IC 4499 contains two generations of stars.