NGC 6530
H beta observations
No
Ref
beta
N
0042
291
2.577
1
0056
291
2.55
1
0058
291
2.438
1
0060
291
2.637
1
0061
291
2.590
1
0076
291
2.589
1
0086
291
2.586
1
0093
291
2.595
1