这个疏散星团包含一些质量近我们的太阳近50倍的明亮恒星，许多微弱的星星只有太阳质量的一小部分并且缺席的微类星体在百万年前就已经被排除。
This open cluster of stars contains a few bright stars nearly 50 times the mass of our sun , many dim stars only a fraction of the mass of our sun , and an absent microquasar that was expelled millions of years ago .
微类星体