TOI-1136 c
TOI-1136 c is a super-Earth orbiting TOI-1136 in the constellation Draco. It lies about 276 light-years from Earth and was discovered in 2022 using the transit method.
Is TOI-1136 c in the Habitable Zone?
TOI-1136 c orbits inside the inner edge of the habitable zone of TOI-1136. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1136: 0.725–1.708 AU (conservative: 0.918–1.619 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1136 c
The equilibrium temperature of TOI-1136 c is about 1,062 K (789 °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.
Orbit and Year Length
A year on TOI-1136 c — one full orbit around TOI-1136 — lasts 6.26 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.067 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.11).
How Was TOI-1136 c Discovered?
TOI-1136 c was discovered in 2022 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-1136 c?
TOI-1136 c is 275.7 light-years (84.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1751. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,852,320 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TOI-1136 c scores 0.22, ranking #3,644 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1136
TOI-1136
- Surface temperature
- 5,770 K (Sun: 5,772 K)
- Mass
- 1.02 M☉
- Radius
- 0.97 R☉
- Age
- 0.7 billion years (Sun: 4.6)
The TOI-1136 Planetary System
TOI-1136 c is one of 6 known planets in the TOI-1136 system. Its siblings:
- TOI-1136 b (Super Earth)
- TOI-1136 d (Super Earth)
- TOI-1136 e (Super Earth)
- TOI-1136 f (Super Earth)
- TOI-1136 g (Super Earth)
TOI-1136 c — Complete Data
| Mass | 6.32 Earth masses (0.020 Jupiter masses) |
|---|---|
| Density | 1.45 g/cm³ (Earth: 5.51) |
| Orbital period | 6.26 days |
| Orbital distance | 0.067 AU |
| Eccentricity | 0.110 |
| Equilibrium temperature | 1,062 K (789 °C) |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 275.7 light-years (84.5 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2024-04-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1136 c
Is TOI-1136 c habitable?
No — TOI-1136 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1136 c?
TOI-1136 c is about 276 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,852,320 years to get there.
How long is a year on TOI-1136 c?
One orbit around TOI-1136 takes 6.3 Earth days — short enough that 58 of its years would fit into one Earth year.
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