Stellar Magnitudes, Colors, Temperatures and Bolometric Corrections for Normal Stars
Sp Mv (B-V)0 (U-B)0 Teff BC Mbol

 Main Sequence Stars, Luminosity Class V
O5 - 5.8 - 0.35 - 1.15 40000 - 4.0 - 10
B0 - 4.1 - 0.31 - 1.06 28000 - 2.8 - 6.8
B5 - 1.1 - 0.16 - 0.55 15500 - 1.5 - 2.6
A0 + 0.7 0.00 - 0.02 9900 - 0.40 + 0.1
A5 2.0 + 0.13 + 0.10 8500 - 0.12 1.7
F0 2.6 0.27 0.07 7400 - 0.06 2.6
F5 3.4 0.42 0.03 6580 0.00 3.4
G0 4.4 0.58 0.05 6030 - 0.03 4.3
G5 5.1 0.70 0.19 5520 - 0.07 5.0
K0 5.9 0.89 0.47 4900 - 0.19 5.8
K5 7.3 1.18 1.10 4130 - 0.60 6.7
M0 9.0 1.45 1.28 3480 - 1.19 7.8
M5 11.8 1.63 1.2 2800 - 2.3 9.8
M8 16 1.8   2400    
Giants, Luminosity Class III                   
G0 1.1 0.65 0.3 5600 - 0.03 1.1
G5 0.7 0.85 0.53 5000 - 0.2 0.5
K0 0.5 1.07 0.90 4500 - 0.5 0.2
K5 - 0.2 1.41 1.5 3800 - 0.9 - 1.0
M0 - 0.4 1.60 1.8 3200 - 1.6 - 1.8
M5 - 0.8 1.85 2.3   - 2.8 - 3
Supergiants, Luminosity Class I
B0 - 6.4 - 0.25 - 1.2 30000 - 3 - 9
A0 - 6.2 0.00 - 0.3 12000 - 0.5 - 7
F0 - 6 + 0.25 + 0.25 7000 - 0.1 - 6.0
G0 - 6 0.70 0.60 5700 - 0.1 - 5.2
G5 - 6 1.06 0.87 4850 - 0.3 - 5.2
K0 - 5 1.39 1.34 4100 - 0.7 - 5.4
K5 - 5 1.70 1.7 3500 - 1.2 - 6
M0 - 5 1.94 1.7   - 1.9 - 7
M5   2.14     - 3.2