List of hottest stars
This is an incomplete list of the hottest stars in the universe. Most of the hottest stars in the universe are Wolf–Rayet stars. They have temperatures of 50,000 to 200,000 degrees Celsius. White dwarfs and neutron stars can be much hotter than Wolf-Rayet stars. The hottest white dwarfs are about 200,000 degrees Celsius, while neutron stars can be hotter than 3 million degrees Celsius. Some of the information in the list below may not be 100% correct.
1 solar radius = 695700 km
1 solar luminosity = 3.828e+16 watts
NA: not available
| Star name | Temperature
(in degrees Celsius) |
Radius
(in solar radii) |
Luminosity
(rounded to the nearest ten thousand)* |
|---|---|---|---|
| PSR B0943+10 | 3,100,000 | 0.00001437401 | 17.19 |
| Crab Pulsar | 1,550,000 | 0.00001437401 | 1.07 |
| RX J0439.8−6809 | 250,000 | NA | NA |
| HD 49798 | 225,000 | 0.0023 | 12.21 |
| KPD 0005+5106 | 200,000 | 0.055 | 4,360 |
| WR 102 | 200,000 | 0.52 | 390,000 |
| WR 142 | 200,000 | 0.8 | 920,000 |
| LMC195-1 | 200,000 | 1.4 | 2,830,000 |
| BAT99-123 | 170,000 | 0.47 | 170,000 |
| WR 93b | 170,000 | 0.44 | 110,000 |
| WR 2 | 141,000 | 0.89 | 280,000 |
| AB8 | 141,000 | 2 | 1,420,000 |
| BAT99-94 | 141,000 | NA | NA |
| BAT99-2 | 141,000 | NA | NA |
| WR 9 | 139,700 | 5 | 8,580,000 |
| WR 1 | 115,000 | 1.33 | 280,000 |
| HD 56925 | 112,000 | 1.4 | 280,000 |
| WR 46 | 112,000 | 2.11 | 630,000 |
| AB7 | 105,000 | 3.4 | 1,270,000 |
| WR 37 | 100,000 | NA | NA |
| Z Andromedae B | 70,000 | 0.36 | 10,000 |
| Gamma Velorum WR | 70,000 | 1.9 | 210,000 |
| WR 150 | 89,100 | 3.59 | 730,000 |
| EZ Canis Majoris | 85,000 | 2.68 | 340,000 |
| WR 136 | 71,000 | 3.34 | 260,000 |
| WR 134 | 63,000 | 5.29 | 400,000 |
| Sun (for comparison) | 5,500 | 1 | 1 |
Note: luminosities are all calculated based on radius and temperature. * If the star luminosity is not enough to round up to 10,000, the full number is written.