1·After deriving their effective temperatures and luminosities from their (B-V), (U-B) colors and parallaxes we find their positions in the HR diagram to be mostly confined to the main sequence.
在从样本星的色指数（B -V） ，（U -B）和视差得到它们的有效温度和光度之后，我们发现在赫罗图上它们大多数是位于主序带内的。