TOI-6255 b
TOI-6255 b is a terrestrial planet orbiting TOI-6255 in the constellation Lacerta. It lies about 66 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-6255 b?
TOI-6255 b has a radius of 1.08 times that of Earth. Its mass is 1.4 times that of Earth.
Is TOI-6255 b in the Habitable Zone?
The position of TOI-6255 b relative to the habitable zone of TOI-6255 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-6255: 0.106–0.277 AU (conservative: 0.134–0.262 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 ›
Orbit and Year Length
A year on TOI-6255 b — one full orbit around TOI-6255 — lasts just 5.7 hours, shorter than Mercury's 88-day year.
How Was TOI-6255 b Discovered?
TOI-6255 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-6255 b?
TOI-6255 b is 66.3 light-years (20.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1960. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,166,880 years to make the journey.
The Host Star: TOI-6255
TOI-6255
- Surface temperature
- 3,421 K (Sun: 5,772 K)
- Mass
- 0.35 M☉
- Radius
- 0.37 R☉
Planetary System
TOI-6255 b is the only planet known to orbit TOI-6255 so far.
TOI-6255 b — Complete Data
| Radius | 1.079 Earth radii (0.096 Jupiter radii) |
|---|---|
| Mass | 1.44 Earth masses (0.005 Jupiter masses) |
| Orbital period | 0.24 days |
| Distance from Earth | 66.3 light-years (20.3 parsecs) |
| Constellation | Lacerta |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-08-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6255 b
Is TOI-6255 b habitable?
TOI-6255 b is not known to orbit within the habitable zone of TOI-6255, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is TOI-6255 b?
TOI-6255 b is about 66 light-years from Earth in the constellation Lacerta. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,166,880 years to get there.
How big is TOI-6255 b compared to Earth?
TOI-6255 b has 1.08 times the radius of Earth and about 1.4 times its mass.
How long is a year on TOI-6255 b?
One orbit around TOI-6255 takes 0.2 Earth days — short enough that 1,533 of its years would fit into one Earth year.
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