TOI-700 b
Planet· orbits TOI-700
TOI-700 b — the innermost planet, a hot, Earth-size world (0.91 Earth radii) on a 10-day orbit. Its size is measured (it transits), but its mass is only estimated from that size, so no density is quoted. Likely rocky. Never imaged.
Open in 3D viewSee TOI-700 b in the live, interactive 3D map
Key facts
Radius
5,823 km
91% of Earth's radius
Year
9.98 Earth days
Distance from TOI-700
10,127,776 km
Science
Physical
- Radius
- 5,823 km · 91% of Earth's radius
Orbital
- Semi-major axis
- 10,127,776 km
- From the NASA Exoplanet Archive (transit + orbit fit)
- Eccentricity
- 0
- From the NASA Exoplanet Archive (transit + orbit fit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (transit + orbit fit)
- Orbital period
- 10.0 days
- From the NASA Exoplanet Archive (transit + orbit fit)
- Perihelion
- 10,127,776 km
- Computed from the orbital elements
- Aphelion
- 10,127,776 km
- Computed from the orbital elements
- Mean orbital velocity
- 73.8 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- An Earth-size world (0.91 Earth radii); its size is measured (it transits), but its mass is only estimated from that size, so no density is quoted. Likely rocky. Never imaged.
- Surface appearance
- Appearance based on NASA/JPL-Caltech's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The surface shown is an artistic representation, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 4.99 S⊕ · 4.99× the sunlight Earth receives
- Computed from TOI-700's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 417 K (144 °C)
- Computed model value for its tight 10-day orbit — not measured.
Discovery & history
- Method
- Transit detection
- Name
- Designated 'b' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order they are found (the star is the unwritten 'a'); no IAU proper name has been assigned.
One of the three planets announced in 2020 from TESS data — the compact inner companion of the system.
Images
No telescope has imaged this world — it is known only from the tiny dip it makes crossing its star. Only its host system has been pictured (see the system view); its true surface appearance is unknown.