TOI-2322 b
TOI-2322 b is a terrestrial planet orbiting the K4 star TOI-2322 in the constellation Volans. It lies about 195 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-2322 b?
TOI-2322 b has a radius of 0.99 times that of Earth. Its mass is 2.3 times that of Earth, giving it a density of 12.75 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-2322 b in the Habitable Zone?
TOI-2322 b orbits inside the inner edge of the habitable zone of TOI-2322. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2322: 0.338–0.829 AU (conservative: 0.428–0.786 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-2322 b
The equilibrium temperature of TOI-2322 b is about 603 K (330 °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. It receives 22.04 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-2322 b — one full orbit around TOI-2322 — lasts 11.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.092 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2322 b Discovered?
TOI-2322 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-2322 b?
TOI-2322 b is 195.2 light-years (59.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1831. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,435,520 years to make the journey.
The Host Star: TOI-2322
TOI-2322
- Spectral type
- K4
- Surface temperature
- 4,664 K (Sun: 5,772 K)
- Mass
- 0.70 M☉
- Radius
- 0.66 R☉
- Luminosity
- 0.1810 L☉
- Age
- 3.9 billion years (Sun: 4.6)
The TOI-2322 Planetary System
TOI-2322 b is one of 2 known planets in the TOI-2322 system. Its siblings:
- TOI-2322 c (Super Earth)
TOI-2322 b — Complete Data
| Radius | 0.994 Earth radii (0.089 Jupiter radii) |
|---|---|
| Mass | 2.31 Earth masses (0.007 Jupiter masses) |
| Density | 12.75 g/cm³ (Earth: 5.51) |
| Orbital period | 11.31 days |
| Orbital distance | 0.092 AU |
| Equilibrium temperature | 603 K (330 °C) |
| Stellar irradiation | 22.04× Earth |
| Distance from Earth | 195.2 light-years (59.9 parsecs) |
| Constellation | Volans |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-09-17. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2322 b
Is TOI-2322 b habitable?
No — TOI-2322 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2322 b?
TOI-2322 b is about 195 light-years from Earth in the constellation Volans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,435,520 years to get there.
How big is TOI-2322 b compared to Earth?
TOI-2322 b has 0.99 times the radius of Earth and about 2.3 times its mass.
How long is a year on TOI-2322 b?
One orbit around TOI-2322 takes 11.3 Earth days — short enough that 32 of its years would fit into one Earth year.
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