TOI-1422 b
TOI-1422 b is a puffy low-density planet orbiting the G2 V star TOI-1422 in the constellation Andromeda. It lies about 506 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-1422 b?
TOI-1422 b has a radius of 3.83 times that of Earth. Its mass is 9.5 times that of Earth, giving it a density of 0.93 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-1422 b in the Habitable Zone?
The position of TOI-1422 b relative to the habitable zone of TOI-1422 cannot be precisely determined from the available orbital data.
Temperature on TOI-1422 b
The equilibrium temperature of TOI-1422 b is about 870 K (597 °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-1422 b — one full orbit around TOI-1422 — lasts 13.0 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.107 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.20).
How Was TOI-1422 b Discovered?
TOI-1422 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-1422 b?
TOI-1422 b is 506.0 light-years (155.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1520. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 8,905,600 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-1422 b scores 0.19, ranking #3,983 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1422
TOI-1422
- Spectral type
- G2 V
The TOI-1422 Planetary System
TOI-1422 b is one of 2 known planets in the TOI-1422 system. Its siblings:
- TOI-1422 c (Super Earth)
TOI-1422 b — Complete Data
| Radius | 3.830 Earth radii (0.342 Jupiter radii) |
|---|---|
| Mass | 9.50 Earth masses (0.030 Jupiter masses) |
| Density | 0.93 g/cm³ (Earth: 5.51) |
| Orbital period | 13.00 days |
| Orbital distance | 0.107 AU |
| Eccentricity | 0.200 |
| Equilibrium temperature | 870 K (597 °C) |
| Earth Similarity Index | 0.19 |
| Distance from Earth | 506.0 light-years (155.1 parsecs) |
| Constellation | Andromeda |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2025-12-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1422 b
Is TOI-1422 b habitable?
TOI-1422 b is not known to orbit within the habitable zone of TOI-1422, and as a puffy low-density planet it is an unlikely candidate for life as we know it.
How far away is TOI-1422 b?
TOI-1422 b is about 506 light-years from Earth in the constellation Andromeda. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 8,905,600 years to get there.
How big is TOI-1422 b compared to Earth?
TOI-1422 b has 3.83 times the radius of Earth and about 9.5 times its mass.
How long is a year on TOI-1422 b?
One orbit around TOI-1422 takes 13.0 Earth days — short enough that 28 of its years would fit into one Earth year.
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