TOI-5388.01
TOI-5388.01 is a terrestrial planet orbiting the M3.0 V star TOI-5388 in the constellation Leo Minor. It lies about 60 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-5388.01?
TOI-5388.01 has a radius of 0.99 times that of Earth. Its mass is 2.2 times that of Earth, giving it a density of 11.90 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-5388.01 in the Habitable Zone?
The position of TOI-5388.01 relative to the habitable zone of TOI-5388 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-5388: 0.087–0.227 AU (conservative: 0.110–0.215 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-5388.01
The equilibrium temperature of TOI-5388.01 is about 488 K (215 °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-5388.01 — one full orbit around TOI-5388 — lasts 2.59 Earth days, shorter than Mercury's 88-day year.
How Was TOI-5388.01 Discovered?
TOI-5388.01 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-5388.01?
TOI-5388.01 is 60.4 light-years (18.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1966. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,063,040 years to make the journey.
The Host Star: TOI-5388
TOI-5388
- Spectral type
- M3.0 V
- Surface temperature
- 3,440 K (Sun: 5,772 K)
- Mass
- 0.29 M☉
- Radius
- 0.30 R☉
- Luminosity
- 0.0113 L☉
Planetary System
TOI-5388.01 is the only planet known to orbit TOI-5388 so far.
TOI-5388.01 — Complete Data
| Radius | 0.990 Earth radii (0.088 Jupiter radii) |
|---|---|
| Mass | 2.20 Earth masses (0.007 Jupiter masses) |
| Density | 11.90 g/cm³ (Earth: 5.51) |
| Orbital period | 2.59 days |
| Equilibrium temperature | 488 K (215 °C) |
| Distance from Earth | 60.4 light-years (18.5 parsecs) |
| Constellation | Leo Minor |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2026-02-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5388.01
Is TOI-5388.01 habitable?
TOI-5388.01 is not known to orbit within the habitable zone of TOI-5388, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is TOI-5388.01?
TOI-5388.01 is about 60 light-years from Earth in the constellation Leo Minor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,063,040 years to get there.
How big is TOI-5388.01 compared to Earth?
TOI-5388.01 has 0.99 times the radius of Earth and about 2.2 times its mass.
How long is a year on TOI-5388.01?
One orbit around TOI-5388 takes 2.6 Earth days — short enough that 141 of its years would fit into one Earth year.
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