Westerlund 1

MK spectral classification

NoRefMK
00021022O9.5-B0.5 Ia
00041022F2 Ia+
00051022WNL
00061022O9.5-B0.5 Ia
00071022B5 Ia+
00081022F5 Ia+
00101022O9.5-B0.5 Ia
00111022O9.5-B0.5 Ia
00121022A5 Ia+
00161022A2 Ia+
00191022O9.5-B0.5 Ia
00231022O9.5-B0.5 Ia
00281022O9.5-B0.5 Ia
00291022O9.5-B0.5 Ia
00321022F5 Ia+
00331022B5 Ia+
00351022O9.5-B0.5 Ia
00421022B5 Ia+?
00431022O9.5-B0.5 Ia
00441022WN9
00551022O9.5-B0.5 Ia
00561022O9.5-B0.5 Ia
00571022B3 Ia
00601022O9.5-B0.5 Ia
00611022O9.5-B0.5 Ia
00661022WC9
00701022B3 Ia
00711022B3 Ia
00721022WN4-5
02381022O9.5-B0.5 Ia
02391022WC9
02411022WC9
02651022F5 Ia+
04031022WN6-7
04041022WC8
04051022WN6-8
04061022WC9
04071022WN6-8
04081022WN6-8
04091022WC8-9
10381022WN6-8