TOI-5734 b
TOI-5734 b is a super-Earth orbiting the K3-K4 V star TOI-5734 in the constellation Auriga. It lies about 106 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-5734 b?
TOI-5734 b has a radius of 2.10 times that of Earth. Its mass is 9.1 times that of Earth, giving it a density of 5.40 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-5734 b in the Habitable Zone?
TOI-5734 b orbits inside the inner edge of the habitable zone of TOI-5734. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5734: 0.337–0.823 AU (conservative: 0.427–0.781 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-5734 b
The equilibrium temperature of TOI-5734 b is about 688 K (415 °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.
Orbit and Year Length
A year on TOI-5734 b — one full orbit around TOI-5734 — lasts 6.18 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.059 AU — closer to its star than Mercury is to the Sun.
How Was TOI-5734 b Discovered?
TOI-5734 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-5734 b?
TOI-5734 b is 106.0 light-years (32.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1920. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,865,600 years to make the journey.
The Host Star: TOI-5734
TOI-5734
- Spectral type
- K3-K4 V
- Surface temperature
- 4,750 K (Sun: 5,772 K)
- Mass
- 0.72 M☉
- Radius
- 0.64 R☉
- Luminosity
- 0.1810 L☉
- Age
- 0.5 billion years (Sun: 4.6)
Planetary System
TOI-5734 b is the only planet known to orbit TOI-5734 so far.
TOI-5734 b — Complete Data
| Radius | 2.100 Earth radii (0.187 Jupiter radii) |
|---|---|
| Mass | 9.10 Earth masses (0.029 Jupiter masses) |
| Density | 5.40 g/cm³ (Earth: 5.51) |
| Orbital period | 6.18 days |
| Orbital distance | 0.059 AU |
| Equilibrium temperature | 688 K (415 °C) |
| Distance from Earth | 106.0 light-years (32.5 parsecs) |
| Constellation | Auriga |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-03-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5734 b
Is TOI-5734 b habitable?
No — TOI-5734 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5734 b?
TOI-5734 b is about 106 light-years from Earth in the constellation Auriga. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,865,600 years to get there.
How big is TOI-5734 b compared to Earth?
TOI-5734 b has 2.10 times the radius of Earth and about 9.1 times its mass.
How long is a year on TOI-5734 b?
One orbit around TOI-5734 takes 6.2 Earth days — short enough that 59 of its years would fit into one Earth year.
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