TOI-2529 b
TOI-2529 b is a cold gas giant orbiting TOI-2529 in the constellation Carina. It lies about 966 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-2529 b?
TOI-2529 b has a radius of 11.55 times that of Earth, or 1.03 times the radius of Jupiter. Its mass is 744 times that of Earth.
Is TOI-2529 b in the Habitable Zone?
TOI-2529 b orbits inside the inner edge of the habitable zone of TOI-2529. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2529: 1.278–3.010 AU (conservative: 1.619–2.854 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-2529 b
The equilibrium temperature of TOI-2529 b is about 636 K (363 °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-2529 b — one full orbit around TOI-2529 — lasts 64.6 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.327 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.021).
How Was TOI-2529 b Discovered?
TOI-2529 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-2529 b?
TOI-2529 b is 966.3 light-years (296.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1060. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 17,006,880 years to make the journey.
The Host Star: TOI-2529
TOI-2529
- Surface temperature
- 5,802 K (Sun: 5,772 K)
- Mass
- 1.11 M☉
- Radius
- 1.70 R☉
- Luminosity
- 2.9100 L☉
- Age
- 7.2 billion years (Sun: 4.6)
Planetary System
TOI-2529 b is the only planet known to orbit TOI-2529 so far.
TOI-2529 b — Complete Data
| Radius | 11.545 Earth radii (1.030 Jupiter radii) |
|---|---|
| Mass | 743.72 Earth masses (2.340 Jupiter masses) |
| Orbital period | 64.59 days |
| Orbital distance | 0.327 AU |
| Eccentricity | 0.021 |
| Equilibrium temperature | 636 K (363 °C) |
| Distance from Earth | 966.3 light-years (296.3 parsecs) |
| Constellation | Carina |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-08-29. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2529 b
Is TOI-2529 b habitable?
No — TOI-2529 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2529 b?
TOI-2529 b is about 966 light-years from Earth in the constellation Carina. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 17,006,880 years to get there.
How big is TOI-2529 b compared to Earth?
TOI-2529 b has 11.55 times the radius of Earth and about 744 times its mass.
How long is a year on TOI-2529 b?
One orbit around TOI-2529 takes 64.6 Earth days.
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