TOI-5349 b
TOI-5349 b is a hot Jupiter orbiting the M1+/-0.5 star TOI-5349 in the constellation Taurus. It lies about 614 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-5349 b?
TOI-5349 b has a radius of 10.20 times that of Earth, or 0.91 times the radius of Jupiter. Its mass is 127 times that of Earth, giving it a density of 0.66 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-5349 b in the Habitable Zone?
TOI-5349 b orbits inside the inner edge of the habitable zone of TOI-5349. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5349: 0.205–0.524 AU (conservative: 0.259–0.497 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-5349 b
The equilibrium temperature of TOI-5349 b is about 719 K (446 °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. It receives 44.50 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-5349 b — one full orbit around TOI-5349 — lasts 3.32 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.037 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.030).
How Was TOI-5349 b Discovered?
TOI-5349 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-5349 b?
TOI-5349 b is 614.3 light-years (188.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1412. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,811,680 years to make the journey.
The Host Star: TOI-5349
TOI-5349
- Spectral type
- M1+/-0.5
- Surface temperature
- 3,751 K (Sun: 5,772 K)
- Mass
- 0.61 M☉
- Radius
- 0.58 R☉
- Luminosity
- 0.0630 L☉
- Age
- 9.0 billion years (Sun: 4.6)
Planetary System
TOI-5349 b is the only planet known to orbit TOI-5349 so far.
TOI-5349 b — Complete Data
| Radius | 10.200 Earth radii (0.910 Jupiter radii) |
|---|---|
| Mass | 127.40 Earth masses (0.400 Jupiter masses) |
| Density | 0.66 g/cm³ (Earth: 5.51) |
| Orbital period | 3.32 days |
| Orbital distance | 0.037 AU |
| Eccentricity | 0.030 |
| Equilibrium temperature | 719 K (446 °C) |
| Stellar irradiation | 44.50× Earth |
| Distance from Earth | 614.3 light-years (188.3 parsecs) |
| Constellation | Taurus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-01-15. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5349 b
Is TOI-5349 b habitable?
No — TOI-5349 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5349 b?
TOI-5349 b is about 614 light-years from Earth in the constellation Taurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,811,680 years to get there.
How big is TOI-5349 b compared to Earth?
TOI-5349 b has 10.20 times the radius of Earth and about 127 times its mass.
How long is a year on TOI-5349 b?
One orbit around TOI-5349 takes 3.3 Earth days — short enough that 110 of its years would fit into one Earth year.
Explore TOI-5349 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
