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。
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 .
主序带