TOI-5076 b
TOI-5076 b is a sub-Neptune orbiting TOI-5076 in the constellation Aries. It lies about 270 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-5076 b?
TOI-5076 b has a radius of 3.49 times that of Earth. Its mass is 16.1 times that of Earth, giving it a density of 2.08 g/cm³ — between that of rocky and gaseous planets.
Is TOI-5076 b in the Habitable Zone?
TOI-5076 b orbits inside the inner edge of the habitable zone of TOI-5076. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5076: 0.459–1.119 AU (conservative: 0.581–1.061 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-5076 b
The equilibrium temperature of TOI-5076 b is about 550 K (277 °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.
Orbit and Year Length
A year on TOI-5076 b — one full orbit around TOI-5076 — lasts 23.4 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.148 AU — closer to its star than Mercury is to the Sun.
How Was TOI-5076 b Discovered?
TOI-5076 b was discovered in 2024 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-5076 b?
TOI-5076 b is 270.2 light-years (82.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1756. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,755,520 years to make the journey.
The Host Star: TOI-5076
TOI-5076 b belongs to a system of 2 stars; it orbits TOI-5076.
TOI-5076
- Surface temperature
- 4,780 K (Sun: 5,772 K)
- Mass
- 0.79 M☉
- Radius
- 0.84 R☉
- Luminosity
- 0.3360 L☉
- Age
- 8.4 billion years (Sun: 4.6)
Planetary System
TOI-5076 b is the only planet known to orbit TOI-5076 so far.
TOI-5076 b — Complete Data
| Radius | 3.489 Earth radii (0.311 Jupiter radii) |
|---|---|
| Mass | 16.15 Earth masses (0.051 Jupiter masses) |
| Density | 2.08 g/cm³ (Earth: 5.51) |
| Orbital period | 23.44 days |
| Orbital distance | 0.148 AU |
| Equilibrium temperature | 550 K (277 °C) |
| Distance from Earth | 270.2 light-years (82.9 parsecs) |
| Constellation | Aries |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2025-03-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5076 b
Is TOI-5076 b habitable?
No — TOI-5076 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5076 b?
TOI-5076 b is about 270 light-years from Earth in the constellation Aries. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,755,520 years to get there.
How big is TOI-5076 b compared to Earth?
TOI-5076 b has 3.49 times the radius of Earth and about 16.1 times its mass.
How long is a year on TOI-5076 b?
One orbit around TOI-5076 takes 23.4 Earth days — short enough that 16 of its years would fit into one Earth year.
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