TOI-2068 b
TOI-2068 b is a super-Earth orbiting TOI-2068 in the constellation Ursa Major. It lies about 173 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-2068 b?
TOI-2068 b has a radius of 1.82 times that of Earth.
Is TOI-2068 b in the Habitable Zone?
TOI-2068 b orbits inside the inner edge of the habitable zone of TOI-2068. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2068: 0.180–0.463 AU (conservative: 0.228–0.439 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-2068 b
The equilibrium temperature of TOI-2068 b is about 521 K (247 °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 12.23 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-2068 b — one full orbit around TOI-2068 — lasts 7.77 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.063 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2068 b Discovered?
TOI-2068 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-2068 b?
TOI-2068 b is 172.6 light-years (52.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1854. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,037,760 years to make the journey.
The Host Star: TOI-2068
TOI-2068
- Surface temperature
- 3,710 K (Sun: 5,772 K)
- Mass
- 0.56 M☉
- Radius
- 0.54 R☉
- Luminosity
- 0.0489 L☉
- Age
- 7.0 billion years (Sun: 4.6)
Planetary System
TOI-2068 b is the only planet known to orbit TOI-2068 so far.
TOI-2068 b — Complete Data
| Radius | 1.821 Earth radii (0.162 Jupiter radii) |
|---|---|
| Orbital period | 7.77 days |
| Orbital distance | 0.063 AU |
| Equilibrium temperature | 521 K (247 °C) |
| Stellar irradiation | 12.23× Earth |
| Distance from Earth | 172.6 light-years (52.9 parsecs) |
| Constellation | Ursa Major |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-04-15. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2068 b
Is TOI-2068 b habitable?
No — TOI-2068 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2068 b?
TOI-2068 b is about 173 light-years from Earth in the constellation Ursa Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,037,760 years to get there.
How big is TOI-2068 b compared to Earth?
TOI-2068 b has 1.82 times the radius of Earth.
How long is a year on TOI-2068 b?
One orbit around TOI-2068 takes 7.8 Earth days — short enough that 47 of its years would fit into one Earth year.
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