TOI-2260 b
TOI-2260 b is a lava world orbiting the G V star TOI-2260 in the constellation Hercules. It lies about 330 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-2260 b?
TOI-2260 b has a radius of 1.62 times that of Earth.
Is TOI-2260 b in the Habitable Zone?
TOI-2260 b orbits inside the inner edge of the habitable zone of TOI-2260. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2260: 0.656–1.558 AU (conservative: 0.832–1.477 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-2260 b
The equilibrium temperature of TOI-2260 b is about 2,609 K (2,336 °C) — hot enough to melt many metals. 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-2260 b — one full orbit around TOI-2260 — lasts just 8.5 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.010 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2260 b Discovered?
TOI-2260 b was discovered in 2022 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-2260 b?
TOI-2260 b is 330.2 light-years (101.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1696. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,811,520 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TOI-2260 b scores 0.27, ranking #2,476 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2260
TOI-2260
- Spectral type
- G V
- Surface temperature
- 5,534 K (Sun: 5,772 K)
- Mass
- 0.99 M☉
- Radius
- 0.94 R☉
- Age
- 0.3 billion years (Sun: 4.6)
Planetary System
TOI-2260 b is the only planet known to orbit TOI-2260 so far.
TOI-2260 b — Complete Data
| Radius | 1.620 Earth radii (0.145 Jupiter radii) |
|---|---|
| Orbital period | 0.35 days |
| Orbital distance | 0.010 AU |
| Equilibrium temperature | 2,609 K (2,336 °C) |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 330.2 light-years (101.3 parsecs) |
| Constellation | Hercules |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-02-15. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2260 b
Is TOI-2260 b habitable?
No — TOI-2260 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2260 b?
TOI-2260 b is about 330 light-years from Earth in the constellation Hercules. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,811,520 years to get there.
How big is TOI-2260 b compared to Earth?
TOI-2260 b has 1.62 times the radius of Earth.
How long is a year on TOI-2260 b?
One orbit around TOI-2260 takes 0.4 Earth days — short enough that 1,036 of its years would fit into one Earth year.
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