distance

n (cores)

a

b

$\frac{n\left(\text{ClassII}\right)}{n\left(\text{ClassI}\right)}$

d < 170 pc

48

11.0'

4.0'

1.24

170 pc < d < 300 pc

52

9.4'

4.0'

3.12

d > 300 pc

39

5.5'

2.7'

2.19