TOI-4492 b
TOI-4492 b is a hot Jupiter orbiting the G2 V star TOI-4492 in the constellation Vulpecula. It lies about 467 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4492 b?
TOI-4492 b has a radius of 11.78 times that of Earth, or 1.05 times the radius of Jupiter. Its mass is 1,882 times that of Earth, giving it a density of 6.37 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-4492 b in the Habitable Zone?
TOI-4492 b orbits inside the inner edge of the habitable zone of TOI-4492. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-4492: 0.901–2.127 AU (conservative: 1.141–2.017 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-4492 b
The equilibrium temperature of TOI-4492 b is about 1,207 K (934 °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 510 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-4492 b — one full orbit around TOI-4492 — lasts 4.43 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.054 AU — closer to its star than Mercury is to the Sun.
How Was TOI-4492 b Discovered?
TOI-4492 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-4492 b?
TOI-4492 b is 467.0 light-years (143.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1559. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 8,219,200 years to make the journey.
The Host Star: TOI-4492
TOI-4492
- Spectral type
- G2 V
- Surface temperature
- 5,711 K (Sun: 5,772 K)
- Mass
- 1.07 M☉
- Radius
- 1.22 R☉
- Luminosity
- 1.4304 L☉
Planetary System
TOI-4492 b is the only planet known to orbit TOI-4492 so far.
TOI-4492 b — Complete Data
| Radius | 11.781 Earth radii (1.051 Jupiter radii) |
|---|---|
| Mass | 1,881.54 Earth masses (5.920 Jupiter masses) |
| Density | 6.37 g/cm³ (Earth: 5.51) |
| Orbital period | 4.43 days |
| Orbital distance | 0.054 AU |
| Equilibrium temperature | 1,207 K (934 °C) |
| Stellar irradiation | 510.00× Earth |
| Distance from Earth | 467.0 light-years (143.2 parsecs) |
| Constellation | Vulpecula |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-08-20. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4492 b
Is TOI-4492 b habitable?
No — TOI-4492 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-4492 b?
TOI-4492 b is about 467 light-years from Earth in the constellation Vulpecula. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 8,219,200 years to get there.
How big is TOI-4492 b compared to Earth?
TOI-4492 b has 11.78 times the radius of Earth and about 1,882 times its mass.
How long is a year on TOI-4492 b?
One orbit around TOI-4492 takes 4.4 Earth days — short enough that 82 of its years would fit into one Earth year.
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