Exoplanet
The first Earth-sized habitable-zone planet discovered by NASA's TESS mission.
| Type | Exoplanet |
|---|---|
| Orbits | TOI-700 |
| Distance from Earth | 101 ly |
| Diameter | 13,672 km |
| Mass | 7.46 × 10²⁴ kg |
| Temperature | -5°C |
| Orbital period | 37 days |
| Apparent magnitude | 13.1 |
| Hemisphere | Southern |
| Discovered | 2020 |
Every exoplanet here was found indirectly, by the wobble or the dimming it causes in its own star, since none is close enough to photograph in real detail.
At 13,672 km across, TOI-700 d is 1.1 times the diameter of Earth.
Its mass is 1.3 times the mass of Earth.
A single orbit takes 37.4 days.
The light reaching us from TOI-700 d tonight left it around 101 years ago.
An average temperature of 268 K works out at -5 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 2020.
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