TOI-2427 b
TOI-2427 b is a super-Earth orbiting TOI-2427 in the constellation Fornax. It lies about 93 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-2427 b?
TOI-2427 b has a radius of 1.80 times that of Earth.
Is TOI-2427 b in the Habitable Zone?
TOI-2427 b orbits inside the inner edge of the habitable zone of TOI-2427. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2427: 0.261–0.659 AU (conservative: 0.331–0.625 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-2427 b
The equilibrium temperature of TOI-2427 b is about 1,117 K (844 °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-2427 b — one full orbit around TOI-2427 — lasts just 31.3 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.020 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2427 b Discovered?
TOI-2427 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-2427 b?
TOI-2427 b is 93.0 light-years (28.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1933. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,636,800 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-2427 b scores 0.27, ranking #2,629 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2427
TOI-2427
- Surface temperature
- 4,072 K (Sun: 5,772 K)
- Mass
- 0.64 M☉
- Radius
- 0.65 R☉
Planetary System
TOI-2427 b is the only planet known to orbit TOI-2427 so far.
TOI-2427 b — Complete Data
| Radius | 1.800 Earth radii (0.161 Jupiter radii) |
|---|---|
| Orbital period | 1.31 days |
| Orbital distance | 0.020 AU |
| Equilibrium temperature | 1,117 K (844 °C) |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 93.0 light-years (28.5 parsecs) |
| Constellation | Fornax |
| 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-2427 b
Is TOI-2427 b habitable?
No — TOI-2427 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2427 b?
TOI-2427 b is about 93 light-years from Earth in the constellation Fornax. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,636,800 years to get there.
How big is TOI-2427 b compared to Earth?
TOI-2427 b has 1.80 times the radius of Earth.
How long is a year on TOI-2427 b?
One orbit around TOI-2427 takes 1.3 Earth days — short enough that 280 of its years would fit into one Earth year.
Explore TOI-2427 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
