TOI-700 d
Artistic simulation of TOI-700 d, depicted here as a possible ocean planet. The actual appearance of the planet is not currently known. | |
| Discovery | |
|---|---|
| Discovered by | Emily Gilbert et al. |
| Discovery date | 3 January 2020 |
| Transit | |
| Orbital characteristics | |
| 0.1610±0.0097 AU | |
| Eccentricity | 0.047+0.054 −0.030 |
| 37.42343+0.00021 −0.00013 d | |
| Inclination | 89.82°+0.12° −0.13° |
| 10°+120° −140° | |
| Semi-amplitude | 0.83+0.16 −0.18 m/s |
| Star | TOI-700 |
| Physical characteristics | |
| 1.156+0.064 −0.063 R🜨 | |
| Mass | 2.40+0.49 −0.52 M🜨 |
Mean density | 8.47+2.45 −2.12 g/cm3 |
| Temperature | 268.8+7.7 −7.6 K 268.8 K (−4.3 °C; 24.2 °F) (equilibrium) |
TOI-700 d is a dense, rocky, near-Earth-sized exoplanet orbiting within the habitable zone of the red dwarf TOI-700. It is located roughly 101.4 light-years (31.1 pc) away from Earth in the constellation of Dorado and is the outermost of 4 confirmed exoplanets around its star. The exoplanet is the first Earth-sized exoplanet in the habitable zone discovered by the Transiting Exoplanet Survey Satellite (TESS).
TOI-700 d orbits its star at a distance of 0.161 AU (24,100,000 km; 15,000,000 mi) from its host star with an orbital period of roughly 37.4 days and has a radius of around 1.19 times that of Earth. It has been estimated that the planet receives about 88% the energy that the Earth receives from the Sun.
It was discovered in early January 2020 by the Transiting Exoplanet Survey Satellite (TESS).