CMD of VVV CL001 (diamonds) compared with UKS 1 (dots). The horizontal-branch red clump of UKS 1 is seen at K_S = 15.3, J − K_S = 2.0. This diagram shows that the RGB of VVV CL001 is slightly bluer than that of UKS 1, from which one can conclude that VVV CL001 is less reddened or more metal-poor than UKS 1, and that the RGB of UKS 1 is much more populated, indicative of the low mass of VVV CL001. The legend gives the radius of the selected cluster region, whereas the arrows indicate the reddening derived for UKS 1.