TOI-5713 b
TOI-5713 b is a super-Earth orbiting the M3.5+/-0.5 star TOI-5713 in the constellation Ursa Major. It lies about 133 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-5713 b?
TOI-5713 b has a radius of 1.77 times that of Earth.
Is TOI-5713 b in the Habitable Zone?
TOI-5713 b orbits inside the inner edge of the habitable zone of TOI-5713. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5713: 0.077–0.202 AU (conservative: 0.097–0.191 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-5713 b
The equilibrium temperature of TOI-5713 b is about 347 K (74 °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 2.26 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-5713 b — one full orbit around TOI-5713 — lasts 10.4 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.060 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.24).
How Was TOI-5713 b Discovered?
TOI-5713 b 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-5713 b?
TOI-5713 b is 133.3 light-years (40.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1893. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,346,080 years to make the journey.
The Host Star: TOI-5713
TOI-5713
- Spectral type
- M3.5+/-0.5
- Surface temperature
- 3,225 K (Sun: 5,772 K)
- Mass
- 0.27 M☉
- Radius
- 0.30 R☉
- Luminosity
- 0.0087 L☉
- Age
- 4.5 billion years (Sun: 4.6)
Planetary System
TOI-5713 b is the only planet known to orbit TOI-5713 so far.
TOI-5713 b — Complete Data
| Radius | 1.770 Earth radii (0.158 Jupiter radii) |
|---|---|
| Orbital period | 10.44 days |
| Orbital distance | 0.060 AU |
| Eccentricity | 0.240 |
| Equilibrium temperature | 347 K (74 °C) |
| Stellar irradiation | 2.26× Earth |
| Distance from Earth | 133.3 light-years (40.9 parsecs) |
| Constellation | Ursa Major |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-11-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5713 b
Is TOI-5713 b habitable?
No — TOI-5713 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5713 b?
TOI-5713 b is about 133 light-years from Earth in the constellation Ursa Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,346,080 years to get there.
How big is TOI-5713 b compared to Earth?
TOI-5713 b has 1.77 times the radius of Earth.
How long is a year on TOI-5713 b?
One orbit around TOI-5713 takes 10.4 Earth days — short enough that 35 of its years would fit into one Earth year.
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