TOI-5736 b
TOI-5736 b is a super-Earth orbiting TOI-5736 in the constellation Boötes. It lies about 301 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-5736 b?
TOI-5736 b has a radius of 1.56 times that of Earth.
Is TOI-5736 b in the Habitable Zone?
The position of TOI-5736 b relative to the habitable zone of TOI-5736 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-5736: 0.220–0.558 AU (conservative: 0.279–0.529 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-5736 b
The equilibrium temperature of TOI-5736 b is about 1,311 K (1,038 °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-5736 b — one full orbit around TOI-5736 — lasts just 15.6 hours, shorter than Mercury's 88-day year.
How Was TOI-5736 b Discovered?
TOI-5736 b was discovered in 2025 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-5736 b?
TOI-5736 b is 301.2 light-years (92.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1725. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,301,120 years to make the journey.
The Host Star: TOI-5736
TOI-5736
- Surface temperature
- 3,949 K (Sun: 5,772 K)
- Mass
- 0.57 M☉
- Radius
- 0.58 R☉
Planetary System
TOI-5736 b is the only planet known to orbit TOI-5736 so far.
TOI-5736 b — Complete Data
| Radius | 1.560 Earth radii (0.139 Jupiter radii) |
|---|---|
| Orbital period | 0.65 days |
| Equilibrium temperature | 1,311 K (1,038 °C) |
| Distance from Earth | 301.2 light-years (92.4 parsecs) |
| Constellation | Boötes |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2026-01-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5736 b
Is TOI-5736 b habitable?
TOI-5736 b is not known to orbit within the habitable zone of TOI-5736, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is TOI-5736 b?
TOI-5736 b is about 301 light-years from Earth in the constellation Boötes. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,301,120 years to get there.
How big is TOI-5736 b compared to Earth?
TOI-5736 b has 1.56 times the radius of Earth.
How long is a year on TOI-5736 b?
One orbit around TOI-5736 takes 0.6 Earth days — short enough that 563 of its years would fit into one Earth year.
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