TOI-201 d
TOI-201 d is a super-Earth orbiting the F star TOI-201 in the constellation Pictor. It lies about 371 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-201 d?
TOI-201 d has a radius of 1.39 times that of Earth. Its mass is 5.8 times that of Earth, giving it a density of 11.00 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-201 d in the Habitable Zone?
TOI-201 d orbits inside the inner edge of the habitable zone of TOI-201. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-201: 1.166–2.710 AU (conservative: 1.477–2.569 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on TOI-201 d — one full orbit around TOI-201 — lasts 5.85 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.070 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.30), swinging dramatically closer to and farther from its star.
How Was TOI-201 d Discovered?
TOI-201 d was discovered in 2026 using the transit method, with observations from Transiting Exoplanet Survey Satellite (TESS).
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is TOI-201 d?
TOI-201 d is 371.2 light-years (113.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1655. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,533,120 years to make the journey.
The Host Star: TOI-201
TOI-201
- Spectral type
- F
- Surface temperature
- 6,423 K (Sun: 5,772 K)
- Mass
- 1.32 M☉
- Radius
- 1.31 R☉
- Luminosity
- 2.6100 L☉
- Age
- 0.7 billion years (Sun: 4.6)
The TOI-201 Planetary System
TOI-201 d is one of 3 known planets in the TOI-201 system. Its siblings:
TOI-201 d — Complete Data
| Radius | 1.390 Earth radii (0.124 Jupiter radii) |
|---|---|
| Mass | 5.80 Earth masses (0.018 Jupiter masses) |
| Density | 11.00 g/cm³ (Earth: 5.51) |
| Orbital period | 5.85 days |
| Orbital distance | 0.070 AU |
| Eccentricity | 0.300 |
| Distance from Earth | 371.2 light-years (113.8 parsecs) |
| Constellation | Pictor |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-05-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-201 d
Is TOI-201 d habitable?
No — TOI-201 d orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-201 d?
TOI-201 d is about 371 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,533,120 years to get there.
How big is TOI-201 d compared to Earth?
TOI-201 d has 1.39 times the radius of Earth and about 5.8 times its mass.
How long is a year on TOI-201 d?
One orbit around TOI-201 takes 5.8 Earth days — short enough that 62 of its years would fit into one Earth year.
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