TOI-4616 b
TOI-4616 b is a terrestrial planet orbiting the M4±0.5 star TOI-4616 in the constellation Pisces. It lies about 92 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4616 b?
TOI-4616 b has a radius of 1.22 times that of Earth.
Is TOI-4616 b in the Habitable Zone?
The position of TOI-4616 b relative to the habitable zone of TOI-4616 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-4616: 0.046–0.122 AU (conservative: 0.058–0.115 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-4616 b
The equilibrium temperature of TOI-4616 b is about 525 K (252 °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 40.00 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-4616 b — one full orbit around TOI-4616 — lasts just 37.3 hours, shorter than Mercury's 88-day year.
How Was TOI-4616 b Discovered?
TOI-4616 b was discovered in 2026 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-4616 b?
TOI-4616 b is 91.7 light-years (28.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1935. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,613,920 years to make the journey.
The Host Star: TOI-4616
TOI-4616
- Spectral type
- M4±0.5
- Surface temperature
- 3,150 K (Sun: 5,772 K)
- Mass
- 0.19 M☉
- Radius
- 0.19 R☉
Planetary System
TOI-4616 b is the only planet known to orbit TOI-4616 so far.
TOI-4616 b — Complete Data
| Radius | 1.220 Earth radii (0.109 Jupiter radii) |
|---|---|
| Orbital period | 1.55 days |
| Equilibrium temperature | 525 K (252 °C) |
| Stellar irradiation | 40.00× Earth |
| Distance from Earth | 91.7 light-years (28.1 parsecs) |
| Constellation | Pisces |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-10-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4616 b
Is TOI-4616 b habitable?
TOI-4616 b is not known to orbit within the habitable zone of TOI-4616, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is TOI-4616 b?
TOI-4616 b is about 92 light-years from Earth in the constellation Pisces. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,613,920 years to get there.
How big is TOI-4616 b compared to Earth?
TOI-4616 b has 1.22 times the radius of Earth.
How long is a year on TOI-4616 b?
One orbit around TOI-4616 takes 1.6 Earth days — short enough that 235 of its years would fit into one Earth year.
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