| Spectral Class | Surface Temperature (K) | Mass
(Sun=1) |
Luminosity
(Sun=1) |
Radius
(Sun=1) |
Approximate Lifetime (years) |
| O5 | 45,000 | 60.0 | 800,000 | 12 | 8 x 105 |
| B5 | 15,400 | 6.0 | 830 | 4.0 | 7 x 107 |
| A5 | 8,100 | 2.0 | 40 | 1.7 | 5 x 108 |
| F5 | 6,500 | 1.3 | 17 | 1.3 | 8 x 108 |
| G5 | 5,800 | 0.92 | 0.79 | 0.92 | 12 x 109 |
| K5 | 4,600 | 0.67 | 0.15 | 0.72 | 45 x 109 |
| M5 | 3,200 | 0.21 | 0.011 | 0.27 | 20 x 1011 |
| L5 | 1,800 | 0.1 | 0.0005 | 0.12 | 3 x 1012 |
| T* | 1,000 | 0.05? | 0.0001? | 0.05? | 15 x 1012 |