TOI-4336 A c
TOI-4336 A c is a super-Earth orbiting the M3.5 V star TOI-4336 A in the constellation Centaurus. It lies about 74 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4336 A c?
TOI-4336 A c has a radius of 1.25 times that of Earth. Its mass is 1.6 times that of Earth, giving it a density of 4.35 g/cm³ — between that of rocky and gaseous planets.
Is TOI-4336 A c in the Habitable Zone?
TOI-4336 A c orbits inside the inner edge of the habitable zone of TOI-4336 A. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-4336 A: 0.086–0.225 AU (conservative: 0.109–0.214 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-4336 A c
The equilibrium temperature of TOI-4336 A c is about 400 K (126 °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 4.24 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-4336 A c — one full orbit around TOI-4336 A — lasts 7.59 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.051 AU — closer to its star than Mercury is to the Sun.
How Was TOI-4336 A c Discovered?
TOI-4336 A c was discovered in 2026 using the transit method, with observations from Multiple Observatories.
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-4336 A c?
TOI-4336 A c is 73.5 light-years (22.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1953. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,293,600 years to make the journey.
The Host Star: TOI-4336 A
TOI-4336 A c belongs to a system of 3 stars; it orbits TOI-4336 A.
TOI-4336 A
- Spectral type
- M3.5 V
- Surface temperature
- 3,307 K (Sun: 5,772 K)
- Mass
- 0.31 M☉
- Radius
- 0.33 R☉
- Luminosity
- 0.0110 L☉
The TOI-4336 A Planetary System
TOI-4336 A c is one of 2 known planets in the TOI-4336 A system. Its siblings:
- TOI-4336 A b (Mini Neptune)
TOI-4336 A c — Complete Data
| Radius | 1.251 Earth radii (0.112 Jupiter radii) |
|---|---|
| Mass | 1.55 Earth masses (0.005 Jupiter masses) |
| Density | 4.35 g/cm³ (Earth: 5.51) |
| Orbital period | 7.59 days |
| Orbital distance | 0.051 AU |
| Equilibrium temperature | 400 K (126 °C) |
| Stellar irradiation | 4.24× Earth |
| Distance from Earth | 73.5 light-years (22.5 parsecs) |
| Constellation | Centaurus |
| Discovery method | Transit |
| Discovery facility | Multiple Observatories |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-02-26. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4336 A c
Is TOI-4336 A c habitable?
No — TOI-4336 A c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-4336 A c?
TOI-4336 A c is about 74 light-years from Earth in the constellation Centaurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,293,600 years to get there.
How big is TOI-4336 A c compared to Earth?
TOI-4336 A c has 1.25 times the radius of Earth and about 1.6 times its mass.
How long is a year on TOI-4336 A c?
One orbit around TOI-4336 A takes 7.6 Earth days — short enough that 48 of its years would fit into one Earth year.
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