TOI-4529 b
TOI-4529 b is a super-Earth orbiting the M1.5 V star TOI-4529 in the constellation Pisces. It lies about 93 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4529 b?
TOI-4529 b has a radius of 1.77 times that of Earth. Its mass is 4.9 times that of Earth, giving it a density of 4.80 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-4529 b in the Habitable Zone?
The position of TOI-4529 b relative to the habitable zone of TOI-4529 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-4529: 0.160–0.412 AU (conservative: 0.203–0.391 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-4529 b
The equilibrium temperature of TOI-4529 b is about 511 K (238 °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.
Orbit and Year Length
A year on TOI-4529 b — one full orbit around TOI-4529 — lasts 5.88 Earth days, shorter than Mercury's 88-day year.
How Was TOI-4529 b Discovered?
TOI-4529 b was discovered in 2026 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-4529 b?
TOI-4529 b is 92.6 light-years (28.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1934. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,629,760 years to make the journey.
The Host Star: TOI-4529
TOI-4529
- Spectral type
- M1.5 V
- Surface temperature
- 3,697 K (Sun: 5,772 K)
- Mass
- 0.48 M☉
- Radius
- 0.48 R☉
- Luminosity
- 0.0387 L☉
Planetary System
TOI-4529 b is the only planet known to orbit TOI-4529 so far.
TOI-4529 b — Complete Data
| Radius | 1.770 Earth radii (0.158 Jupiter radii) |
|---|---|
| Mass | 4.90 Earth masses (0.015 Jupiter masses) |
| Density | 4.80 g/cm³ (Earth: 5.51) |
| Orbital period | 5.88 days |
| Equilibrium temperature | 511 K (238 °C) |
| Distance from Earth | 92.6 light-years (28.4 parsecs) |
| Constellation | Pisces |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-02-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4529 b
Is TOI-4529 b habitable?
TOI-4529 b is not known to orbit within the habitable zone of TOI-4529, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is TOI-4529 b?
TOI-4529 b is about 93 light-years from Earth in the constellation Pisces. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,629,760 years to get there.
How big is TOI-4529 b compared to Earth?
TOI-4529 b has 1.77 times the radius of Earth and about 4.9 times its mass.
How long is a year on TOI-4529 b?
One orbit around TOI-4529 takes 5.9 Earth days — short enough that 62 of its years would fit into one Earth year.
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