TOI-1806.01
TOI-1806.01 is a sub-Neptune orbiting TOI-1806 in the constellation Leo Minor. It lies about 181 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-1806.01?
TOI-1806.01 has a radius of 3.41 times that of Earth.
Is TOI-1806.01 in the Habitable Zone?
TOI-1806.01 orbits inside the inner edge of the habitable zone of TOI-1806. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1806: 0.106–0.277 AU (conservative: 0.134–0.263 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 ›
Temperature on TOI-1806.01
The equilibrium temperature of TOI-1806.01 is about 337 K (64 °C) — hotter than anywhere on Earth. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 2.15 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-1806.01 — one full orbit around TOI-1806 — lasts 15.1 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.088 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1806.01 Discovered?
TOI-1806.01 was discovered in 2024 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-1806.01?
TOI-1806.01 is 181.1 light-years (55.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1845. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,187,360 years to make the journey.
The Host Star: TOI-1806
TOI-1806
- Surface temperature
- 3,272 K (Sun: 5,772 K)
- Mass
- 0.39 M☉
- Radius
- 0.40 R☉
Planetary System
TOI-1806.01 is the only planet known to orbit TOI-1806 so far.
TOI-1806.01 — Complete Data
| Radius | 3.410 Earth radii (0.304 Jupiter radii) |
|---|---|
| Orbital period | 15.15 days |
| Orbital distance | 0.088 AU |
| Equilibrium temperature | 337 K (64 °C) |
| Stellar irradiation | 2.15× Earth |
| Distance from Earth | 181.1 light-years (55.5 parsecs) |
| Constellation | Leo Minor |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-06-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1806.01
Is TOI-1806.01 habitable?
No — TOI-1806.01 orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1806.01?
TOI-1806.01 is about 181 light-years from Earth in the constellation Leo Minor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,187,360 years to get there.
How big is TOI-1806.01 compared to Earth?
TOI-1806.01 has 3.41 times the radius of Earth.
How long is a year on TOI-1806.01?
One orbit around TOI-1806 takes 15.1 Earth days — short enough that 24 of its years would fit into one Earth year.
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