Exoplanet
The hottest known giant planet, so fiercely irradiated that molecules in its atmosphere are torn apart into their constituent atoms.
| Type | Exoplanet |
|---|---|
| Orbits | KELT-9 |
| Distance from Earth | 670 ly |
| Diameter | 264,400 km |
| Mass | 5.47 × 10^27 kg |
| Temperature | 3,777°C |
| Orbital period | 1 days |
| Discovered | 2017 |
At 264,400 km across, KELT-9b is 21 times the diameter of Earth.
Its mass is 915 times the mass of Earth.
A single orbit takes 1.5 days.
The light reaching us from KELT-9b tonight left it around 670 years ago.
An average temperature of 4,050 K works out at 3,777 degrees Celsius, warmer than the 15 degrees Earth averages.
It has been on record since 2017.
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