Infrared CMD (corrected for Galactic extinction) for stars within a radius of 2′ from the center of BH176 (white open and black squares), and Hess-diagram for field stars within a ring between radii of 3 and 10′. Contour levels correspond to a number density of stars (1:17) per 0.05 × 0.05 bin of the Hess-diagram. The isochrone from Marigo et al. (2008) for  [Fe/H]  =  −0.2 dex, age of 7 Gyr, and distance modulus of 16.0 is shown in green. The member and nonmember stars from Frinchaboy et al. (2006), some beyond 2′ from the center, are indicated by blue circles and triangles, respectively. Stars with the best photometric quality (A) in the J, H, and K_s bands in region III are shown as filled black squares.