TOI-700 d

TOI-700 d
	An artist's depiction 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
Discovery date	3 January 2020
Detection method	Transit
Orbital characteristics
Semi-major axis	0.1633±0.0027 AU
Eccentricity	0.042+0.045; −0.030
Orbital period (sidereal)	37.42396+0.00039; −0.00035 d
Inclination	89.80°+0.12°; −0.10°
Argument of perihelion	10°+120°; −140°
Star	TOI-700
Physical characteristics
Mean radius	1.073+0.059; −0.054 R🜨
Mass	≙1.72+1.29; −0.63 ME
Temperature	Teq: 268.8 K (−4.3 °C; 24.2 °F)

TOI-700 d is a near-Earth-sized exoplanet, likely rocky, orbiting within the habitable zone of the red dwarf TOI-700, the outermost planet within the system. It is located roughly 101.4 light-years (31.1 pc) away from Earth in the constellation of Dorado. The exoplanet is the first Earth-sized exoplanet in the habitable zone discovered by the Transiting Exoplanet Survey Satellite (TESS).^[4]^[5]^[6]

TOI-700 d orbits its star at a distance of 0.163 AU (24,400,000 km; 15,200,000 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 86% the energy that the Earth receives from the Sun.^[7]

It was discovered in early January 2020 by the Transiting Exoplanet Survey Satellite (TESS).

^ ^a ^b Cite error: The named reference Gilbert et al. was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Gilbert2023 was invoked but never defined (see the help page).
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^ Cite error: The named reference NASA-20200106b was invoked but never defined (see the help page).
^ Cite error: The named reference SPC-20200106 was invoked but never defined (see the help page).
^ "[VIDEO] TOI 700d : une planète de la taille de la Terre découverte dans une "zone habitable"". midilibre.fr (in French). Retrieved 17 April 2020.

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[Gilbert2023-2] Cite error: The named reference Gilbert2023 was invoked but never defined (see the help page).

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[7] "[VIDEO] TOI 700d : une planète de la taille de la Terre découverte dans une "zone habitable"". midilibre.fr (in French). Retrieved 17 April 2020.

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