The cluster contains no main sequence stars bluer than spectral type F, other than perhaps some of the blue stragglers, since the brighter stars of that age have already left the main sequence.

• 这个星团除了一些蓝掉队星外，没有光谱分类在F以上的蓝色主序星，因为这些较量的恒星都已经离开了主序带。