TOI-6894 b
TOI-6894 b is a hot Jupiter orbiting TOI-6894 in the constellation Leo. It lies about 241 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-6894 b?
TOI-6894 b has a radius of 9.58 times that of Earth, or 0.86 times the radius of Jupiter. Its mass is 53.4 times that of Earth, giving it a density of 0.33 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-6894 b in the Habitable Zone?
TOI-6894 b orbits inside the inner edge of the habitable zone of TOI-6894. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-6894: 0.050–0.134 AU (conservative: 0.064–0.127 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-6894 b
The equilibrium temperature of TOI-6894 b is about 418 K (145 °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 5.54 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-6894 b — one full orbit around TOI-6894 — lasts 3.37 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.026 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.029).
How Was TOI-6894 b Discovered?
TOI-6894 b was discovered in 2025 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-6894 b?
TOI-6894 b is 240.7 light-years (73.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1786. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,236,320 years to make the journey.
The Host Star: TOI-6894
TOI-6894
- Surface temperature
- 3,007 K (Sun: 5,772 K)
- Mass
- 0.21 M☉
- Radius
- 0.23 R☉
- Luminosity
- 0.0037 L☉
Planetary System
TOI-6894 b is the only planet known to orbit TOI-6894 so far.
TOI-6894 b — Complete Data
| Radius | 9.584 Earth radii (0.855 Jupiter radii) |
|---|---|
| Mass | 53.40 Earth masses (0.168 Jupiter masses) |
| Density | 0.33 g/cm³ (Earth: 5.51) |
| Orbital period | 3.37 days |
| Orbital distance | 0.026 AU |
| Eccentricity | 0.029 |
| Equilibrium temperature | 418 K (145 °C) |
| Stellar irradiation | 5.54× Earth |
| Distance from Earth | 240.7 light-years (73.8 parsecs) |
| Constellation | Leo |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-06-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6894 b
Is TOI-6894 b habitable?
No — TOI-6894 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-6894 b?
TOI-6894 b is about 241 light-years from Earth in the constellation Leo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,236,320 years to get there.
How big is TOI-6894 b compared to Earth?
TOI-6894 b has 9.58 times the radius of Earth and about 53.4 times its mass.
How long is a year on TOI-6894 b?
One orbit around TOI-6894 takes 3.4 Earth days — short enough that 108 of its years would fit into one Earth year.
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