TOI-836.01
TOI-836.01 is a super-Earth orbiting the K V star TOI-836 in the constellation Libra. It lies about 90 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is TOI-836.01?
TOI-836.01 has a radius of 2.59 times that of Earth. Its mass is 9.6 times that of Earth, giving it a density of 3.06 g/cm³ — between that of rocky and gaseous planets.
Is TOI-836.01 in the Habitable Zone?
TOI-836.01 orbits inside the inner edge of the habitable zone of TOI-836. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-836: 0.329–0.812 AU (conservative: 0.417–0.770 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-836.01
The equilibrium temperature of TOI-836.01 is about 665 K (392 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 26.71 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-836.01 — one full orbit around TOI-836 — lasts 8.60 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.075 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.08).
How Was TOI-836.01 Discovered?
TOI-836.01 was discovered in 2021 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-836.01?
TOI-836.01 is 89.7 light-years (27.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1937. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,578,720 years to make the journey.
The Host Star: TOI-836
TOI-836
- Spectral type
- K V
- Surface temperature
- 4,552 K (Sun: 5,772 K)
- Mass
- 0.68 M☉
- Radius
- 0.67 R☉
- Age
- 5.4 billion years (Sun: 4.6)
The TOI-836 Planetary System
TOI-836.01 is one of 2 known planets in the TOI-836 system. Its siblings:
- TOI-836 b (Super Earth)
TOI-836.01 — Complete Data
| Radius | 2.587 Earth radii (0.231 Jupiter radii) |
|---|---|
| Mass | 9.60 Earth masses (0.030 Jupiter masses) |
| Density | 3.06 g/cm³ (Earth: 5.51) |
| Orbital period | 8.60 days |
| Orbital distance | 0.075 AU |
| Eccentricity | 0.078 |
| Equilibrium temperature | 665 K (392 °C) |
| Stellar irradiation | 26.71× Earth |
| Distance from Earth | 89.7 light-years (27.5 parsecs) |
| Constellation | Libra |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2023-02-25. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-836.01
Is TOI-836.01 habitable?
No — TOI-836.01 orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-836.01?
TOI-836.01 is about 90 light-years from Earth in the constellation Libra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,578,720 years to get there.
How big is TOI-836.01 compared to Earth?
TOI-836.01 has 2.59 times the radius of Earth and about 9.6 times its mass.
How long is a year on TOI-836.01?
One orbit around TOI-836 takes 8.6 Earth days — short enough that 42 of its years would fit into one Earth year.
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