UBV Photometry: Intrinsic U-B colours
Intrinsic U-B Colours from Schmidt-Kaler
| Sp.T. | V | III | II | Ib | Iab | Ia
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| O5 | -1.19 | -1.18 | -1.17 | -1.17 | -1.17 | -1.17
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| O6 | -1.17 | -1.17 | -1.16 | -1.16 | -1.16 | -1.16
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|---|
| O7 | -1.15 | -1.14 | -1.14 | -1.14 | -1.14 | -1.14
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|---|
| O8 | -1.14 | -1.13 | -1.13 | -1.13 | -1.13 | -1.13
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|---|
| O9 | -1.12 | -1.12 | -1.12 | -1.13 | -1.13 | -1.13
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|---|
| B0 | -1.08 | -1.08 | -1.08 | -1.07 | -1.06 | -1.05
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| B1 | -0.95 | -0.97 | -1.00 | -0.99 | -1.00 | -1.00
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| B2 | -0.84 | -0.91 | -0.92 | -0.92 | -0.93 | -0.96
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|---|
| B3 | -0.71 | -0.74 | -0.82 | -0.82 | -0.83 | -0.85
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| B5 | -0.58 | -0.58 | -0.69 | -0.70 | -0.72 | -0.76
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|---|
| B6 | -0.50 | -0.51 | -0.62 | -0.67 | -0.69 | -0.72
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|---|
| B7 | -0.43 | -0.44 | -0.54 | -0.60 | -0.63 | -0.68
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|---|
| B8 | -0.34 | -0.37 | -0.44 | -0.53 | -0.55 | -0.62
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| B9 | -0.20 | -0.20 | -0.32 | -0.46 | -0.49 | -0.58
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|---|
| A0 | -0.02 | -0.07 | -0.20 | -0.33 | -0.38 | -0.44
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|---|
| A1 | 0.02 | 0.07 | -0.12 | -0.24 | -0.29 | -0.37
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| A2 | 0.05 | 0.06 | -0.05 | -0.20 | -0.25 | -0.30
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| A3 | 0.08 | 0.10 | 0.02 | -0.10 | -0.14 | -0.20
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| A5 | 0.10 | 0.11 | 0.08 | 0.00 | -0.08 | -0.10
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|---|
| A7 | 0.10 | 0.11 | 0.10 | 0.09 | 0.00 | 0.09
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|---|
| A8 | 0.09 | 0.10 | 0.11 | 0.11 | 0.11 | 0.12
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|---|
| F0 | 0.03 | 0.08 | 0.12 | 0.15 | 0.15 | 0.15
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|---|
| F2 | 0.00 | 0.08 | 0.14 | 0.19 | 0.18 | 0.18
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| F5 | -0.02 | 0.09 | 0.16 | 0.27 | 0.27 | 0.27
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|---|
| F8 | 0.02 | 0.10 | 0.24 | 0.40 | 0.41 | 0.43
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|---|
| G0 | 0.06 | 0.21 | 0.32 | 0.50 | 0.52 | 0.52
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|---|
| G2 | 0.12 | 0.39 | 0.42 | 0.62 | 0.63 | 0.65
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|---|
| G5 | 0.20 | 0.56 | 0.60 | 0.81 | 0.83 | 0.82
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|---|
| G8 | 0.30 | 0.70 | 0.78 | 1.05 | 1.07 | 1.08
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| K0 | 0.45 | 0.84 | 0.95 | 1.15 | 1.17 | 1.18
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|---|
| K1 | 0.54 | 1.01 | 1.07 | 1.21 | 1.28 | 1.28
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| K2 | 0.64 | 1.16 | 1.33 | 1.35 | 1.32 | 1.32
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| K3 | 0.80 | 1.39 | 1.58 | 1.56 | 1.60 | 1.60
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| K5 | 1.08 | 1.81 | 1.74 | 1.79 | 1.80 | 1.80
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|---|
| K7 | 1.21 | 1.83 | 1.79 | 1.84 | 1.84 | 1.84
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|---|
| M0 | 1.22 | 1.87 | 1.91 | 1.90 | 1.90 | 1.90
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| M1 | 1.21 | 1.88 | 1.93 | 1.92 | 1.90 | 1.90
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| M2 | 1.18 | 1.89 | 1.94 | 1.95 | 1.95 | 1.95
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| M3 | 1.16 | 1.88 | 1.77 | 1.98 | 1.95 | 1.95
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| M4 | 1.15 | 1.73 |
| 2.12 | 2.00 | 2.05
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| M5 | 1.24 | 1.58 |
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| M6 | 1.32 | 1.16 |
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| M7 | 1.40 |
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| M8 | 1.53 |
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