Star system, 100 light-years
TOI-700 and its four planets
TOI-700 d is an exoplanet 1.145 times Earth's width, 100 light-years away, orbiting in its star's computed habitable zone.
TOI-700 is a star of spectral type M2.5 V, 100 light-years from us, with four known planets. This page takes them one at a time.
Drawn at the system's own scale, every orbit from the Archive's numbers.
What is measured, what is computed, what is imagined.
measured The period, and where the table says so the width and the mass, by the method named in each section.
computed Anything marked computed: the size of an orbit where Kepler's third law corrects the table, the temperature of a bare ball at that distance, the starlight received, and the habitable zone.
imagined The picture is an artist's impression. Nobody has seen the surface of a planet of another star: its colour, clouds and land are not known, and the share picture says so in its corner.
The planets
TOI-700 b
TOI-700 b is an exoplanet 0.963 times Earth's width, 100 light-years away, orbiting closer to its star than the habitable zone we compute for it.
- Width
- 0.963 × Earth's measured
- Mass
- about 0.849 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 9.97722 days measured
- Distance from its star
- 0.0678 au from the Archive
- Temperature of a bare ball there
- 382 K computed, not measured
- Starlight, against Earth's
- 5.07 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2020. Its orbit is closer to its star than the habitable zone computed for it.
See TOI-700 b in 3D · The picture is an artist's impression.
TOI-700 c
TOI-700 c is an exoplanet 2.535 times Earth's width, 100 light-years away, orbiting closer to its star than the habitable zone we compute for it.
- Width
- 2.535 × Earth's measured
- Mass
- about 6.96 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 16.0511 days measured
- Distance from its star
- 0.0931 au from the Archive
- Temperature of a bare ball there
- 326 K computed, not measured
- Starlight, against Earth's
- 2.69 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2020. Its orbit is closer to its star than the habitable zone computed for it.
See TOI-700 c in 3D · The picture is an artist's impression.
TOI-700 e
TOI-700 e is an exoplanet 0.919 times Earth's width, 100 light-years away, orbiting at the edge of its star's computed habitable zone.
- Width
- 0.919 × Earth's measured
- Mass
- about 0.718 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 27.8101 days measured
- Distance from its star
- 0.1336 au from the Archive
- Temperature of a bare ball there
- 272 K computed, not measured
- Starlight, against Earth's
- 1.31 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2023. Its orbit lies at the edge of the conservative habitable zone computed for its star.
See TOI-700 e in 3D · The picture is an artist's impression.
TOI-700 d
TOI-700 d is an exoplanet 1.145 times Earth's width, 100 light-years away, orbiting in its star's computed habitable zone.
- Width
- 1.145 × Earth's measured
- Mass
- about 1.58 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 37.4235 days measured
- Distance from its star
- 0.1642 au from the Archive
- Temperature of a bare ball there
- 245 K computed, not measured
- Starlight, against Earth's
- 0.864 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2020. Its orbit lies inside the conservative habitable zone computed for its star (liquid water on a rocky world's surface would be possible there, which says nothing about whether any is).
See TOI-700 d in 3D · The picture is an artist's impression.
The star
- Surface temperature
- 3,459 K
- Width
- 0.41 × the Sun's
- Mass
- 0.417 × the Sun's
- Spectral type
- M2.5 V
- Distance
- 100 light-years
- Habitable zone, computed
- 0.1582 to 0.3079 au from the star