RCW 16 NGC 2467, sometimes called the Mandrill nebula, is ionised by the ultrahot O3 V star HD 64568, the O6 IV subgiant HD 64315, and the B0 V star LSS 830, according to Avedisova. Besides the NGC 2467 star cluster itself, it includes the star clusters Haffner 18and Haffner 19. The bright foreground star on the far left of the image is the B8 IV subgiant HD 64455.