TOI-7384 b
TOI-7384 b is a sub-Neptune orbiting the M4 star TOI-7384 in the constellation Columba. It lies about 218 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-7384 b?
TOI-7384 b has a radius of 3.56 times that of Earth.
Is TOI-7384 b in the Habitable Zone?
TOI-7384 b orbits inside the inner edge of the habitable zone of TOI-7384. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-7384: 0.080–0.210 AU (conservative: 0.101–0.199 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-7384 b
The equilibrium temperature of TOI-7384 b is about 378 K (105 °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 4.90 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-7384 b — one full orbit around TOI-7384 — lasts 6.23 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.044 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.40), swinging dramatically closer to and farther from its star.
How Was TOI-7384 b Discovered?
TOI-7384 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-7384 b?
TOI-7384 b is 217.8 light-years (66.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1809. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,833,280 years to make the journey.
The Host Star: TOI-7384
TOI-7384
- Spectral type
- M4
- Surface temperature
- 3,185 K (Sun: 5,772 K)
- Mass
- 0.32 M☉
- Radius
- 0.32 R☉
Planetary System
TOI-7384 b is the only planet known to orbit TOI-7384 so far.
TOI-7384 b — Complete Data
| Radius | 3.560 Earth radii (0.318 Jupiter radii) |
|---|---|
| Orbital period | 6.23 days |
| Orbital distance | 0.044 AU |
| Eccentricity | 0.400 |
| Equilibrium temperature | 378 K (105 °C) |
| Stellar irradiation | 4.90× Earth |
| Distance from Earth | 217.8 light-years (66.8 parsecs) |
| Constellation | Columba |
| 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-7384 b
Is TOI-7384 b habitable?
No — TOI-7384 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-7384 b?
TOI-7384 b is about 218 light-years from Earth in the constellation Columba. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,833,280 years to get there.
How big is TOI-7384 b compared to Earth?
TOI-7384 b has 3.56 times the radius of Earth.
How long is a year on TOI-7384 b?
One orbit around TOI-7384 takes 6.2 Earth days — short enough that 59 of its years would fit into one Earth year.
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