TOI-201 c
TOI-201 c is a cold gas giant orbiting the F star TOI-201 in the constellation Pictor. It lies about 371 light-years from Earth and was discovered in 2025 using the transit timing variations method.
How Big Is TOI-201 c?
TOI-201 c has a radius of 10.40 times that of Earth, or 0.93 times the radius of Jupiter. Its mass is 4,990 times that of Earth, giving it a density of 24.00 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-201 c in the Habitable Zone?
TOI-201 c orbits beyond the outer edge of the habitable zone of TOI-201. At that distance, any surface water would almost certainly be frozen.
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 c — one full orbit around TOI-201 — lasts 2,890.0 Earth days, longer than an Earth year. It orbits at an average distance of 4.370 AU. Its orbit is highly elliptical (eccentricity 0.65), swinging dramatically closer to and farther from its star.
How Was TOI-201 c Discovered?
TOI-201 c was discovered in 2025 using the transit timing variations method, with observations from Transiting Exoplanet Survey Satellite (TESS).
Transit timing variations reveal a planet through its gravitational tug on a sibling planet, which makes that sibling's transits arrive slightly early or late. The pattern of these deviations betrays the hidden planet's mass and orbit.
How Far Away Is TOI-201 c?
TOI-201 c 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 c is one of 3 known planets in the TOI-201 system. Its siblings:
TOI-201 c — Complete Data
| Radius | 10.400 Earth radii (0.928 Jupiter radii) |
|---|---|
| Mass | 4,990.00 Earth masses (15.700 Jupiter masses) |
| Density | 24.00 g/cm³ (Earth: 5.51) |
| Orbital period | 2,890.00 days |
| Orbital distance | 4.370 AU |
| Eccentricity | 0.651 |
| Distance from Earth | 371.2 light-years (113.8 parsecs) |
| Constellation | Pictor |
| Discovery method | Transit Timing Variations |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2026-05-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-201 c
Is TOI-201 c habitable?
No — TOI-201 c orbits outside the habitable zone of TOI-201 and is likely too cold for liquid water on its surface.
How far away is TOI-201 c?
TOI-201 c 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 c compared to Earth?
TOI-201 c has 10.40 times the radius of Earth and about 4,990 times its mass.
How long is a year on TOI-201 c?
One orbit around TOI-201 takes 2,890.0 Earth days.
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