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Table 3
Observational parametersa of bright cluster members.
| Star | U | B | V | J | H | K S | Spectral |
| type | |||||||
|
|
|||||||
| S1 | 11.20 | 11.81 | 11.38 | 10.37 | 10.04 | 9.98 | O9.7 V |
| S9 | 12.35 | 12.81 | 12.30 | 11.23 | 10.99 | 10.68 | B0.5 V |
| S12 | 10.50 | 11.15 | 10.79 | 10.05 | 9.99 | 9.95 | O9.7 V + B |
| S13 | 11.74 | 12.31 | 11.95 | 10.89 | 10.83 | 10.76 | B1 V+B1 V |
| S15 | 11.87 | 12.31 | 11.65 | 10.27 | 10.08 | 9.92 | O7.5 V + OB? |
| S17 | 11.65 | 12.07 | 11.43 | 10.00 | 9.79 | 9.68 | O7 Vz |
| S22 | 12.05 | 12.52 | 12.09 | 10.99 | 10.86 | 10.78 | B0 V |
| S24 | 12.6 | 12.0 | 10.32 | 9.92 | 9.48 | B0 Ve | |
| S33 | 12.2 | 11.5 | 9.72 | 9.44 | 9.29 | O6 V((f)) | |
Notes.
(a)
All JHKS photometry is from 2MASS. Precision UBV photometry for all stars from Moffat & Vogt (1975). except S24 and S33, where BV photometry is from UCAC4.
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