TOI-6716 b
TOI-6716 b is a terrestrial planet orbiting the M4 star TOI-6716 in the constellation Canis Major. It lies about 62 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-6716 b?
TOI-6716 b has a radius of 0.98 times that of Earth.
Is TOI-6716 b in the Habitable Zone?
TOI-6716 b orbits inside the inner edge of the habitable zone of TOI-6716. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-6716: 0.055–0.145 AU (conservative: 0.070–0.138 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-6716 b
The equilibrium temperature of TOI-6716 b is about 369 K (96 °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 4.40 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-6716 b — one full orbit around TOI-6716 — lasts 4.72 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.032 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.88), swinging dramatically closer to and farther from its star.
How Was TOI-6716 b Discovered?
TOI-6716 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-6716 b?
TOI-6716 b is 61.6 light-years (18.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1965. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,084,160 years to make the journey.
The Host Star: TOI-6716
TOI-6716
- Spectral type
- M4
- Surface temperature
- 3,110 K (Sun: 5,772 K)
- Mass
- 0.22 M☉
- Radius
- 0.23 R☉
Planetary System
TOI-6716 b is the only planet known to orbit TOI-6716 so far.
TOI-6716 b — Complete Data
| Radius | 0.982 Earth radii (0.088 Jupiter radii) |
|---|---|
| Orbital period | 4.72 days |
| Orbital distance | 0.032 AU |
| Eccentricity | 0.880 |
| Equilibrium temperature | 369 K (96 °C) |
| Stellar irradiation | 4.40× Earth |
| Distance from Earth | 61.6 light-years (18.9 parsecs) |
| Constellation | Canis Major |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-02-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6716 b
Is TOI-6716 b habitable?
No — TOI-6716 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-6716 b?
TOI-6716 b is about 62 light-years from Earth in the constellation Canis Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,084,160 years to get there.
How big is TOI-6716 b compared to Earth?
TOI-6716 b has 0.98 times the radius of Earth.
How long is a year on TOI-6716 b?
One orbit around TOI-6716 takes 4.7 Earth days — short enough that 77 of its years would fit into one Earth year.
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