TOI-5634 A b
TOI-5634 A b is a hot Jupiter orbiting TOI-5634 A in the constellation Leo. It lies about 999 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-5634 A b?
TOI-5634 A b has a radius of 10.42 times that of Earth, or 0.92 times the radius of Jupiter. Its mass is 588 times that of Earth.
Is TOI-5634 A b in the Habitable Zone?
TOI-5634 A b orbits inside the inner edge of the habitable zone of TOI-5634 A. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5634 A: 0.194–0.493 AU (conservative: 0.246–0.468 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-5634 A b
The equilibrium temperature of TOI-5634 A b is about 837 K (564 °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 77.00 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-5634 A b — one full orbit around TOI-5634 A — lasts 2.20 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.027 AU — closer to its star than Mercury is to the Sun.
How Was TOI-5634 A b Discovered?
TOI-5634 A 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-5634 A b?
TOI-5634 A b is 998.5 light-years (306.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1028. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 17,573,600 years to make the journey.
The Host Star: TOI-5634 A
TOI-5634 A b belongs to a system of 2 stars; it orbits TOI-5634 A.
TOI-5634 A
- Surface temperature
- 3,896 K (Sun: 5,772 K)
- Mass
- 0.56 M☉
- Radius
- 0.54 R☉
- Luminosity
- 0.0569 L☉
- Age
- 7.4 billion years (Sun: 4.6)
Planetary System
TOI-5634 A b is the only planet known to orbit TOI-5634 A so far.
TOI-5634 A b — Complete Data
| Radius | 10.420 Earth radii (0.923 Jupiter radii) |
|---|---|
| Mass | 588.00 Earth masses (1.850 Jupiter masses) |
| Orbital period | 2.20 days |
| Orbital distance | 0.027 AU |
| Equilibrium temperature | 837 K (564 °C) |
| Stellar irradiation | 77.00× Earth |
| Distance from Earth | 998.5 light-years (306.1 parsecs) |
| Constellation | Leo |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-08-30. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5634 A b
Is TOI-5634 A b habitable?
No — TOI-5634 A b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5634 A b?
TOI-5634 A b is about 999 light-years from Earth in the constellation Leo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 17,573,600 years to get there.
How big is TOI-5634 A b compared to Earth?
TOI-5634 A b has 10.42 times the radius of Earth and about 588 times its mass.
How long is a year on TOI-5634 A b?
One orbit around TOI-5634 A takes 2.2 Earth days — short enough that 166 of its years would fit into one Earth year.
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