TOI-481 b
TOI-481 b is a hot Jupiter orbiting the G star TOI-481 in the constellation Carina. It lies about 585 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is TOI-481 b?
TOI-481 b has a radius of 11.10 times that of Earth, or 0.99 times the radius of Jupiter. Its mass is 486 times that of Earth.
Is TOI-481 b in the Habitable Zone?
TOI-481 b orbits inside the inner edge of the habitable zone of TOI-481. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-481: 1.241–2.927 AU (conservative: 1.572–2.775 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-481 b
The equilibrium temperature of TOI-481 b is about 1,370 K (1,097 °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-481 b — one full orbit around TOI-481 — lasts 10.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.097 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.15).
How Was TOI-481 b Discovered?
TOI-481 b was discovered in 2020 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-481 b?
TOI-481 b is 585.0 light-years (179.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1441. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,296,000 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TOI-481 b scores 0.08, ranking #4,617 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-481
TOI-481
- Spectral type
- G
- Surface temperature
- 5,735 K (Sun: 5,772 K)
- Mass
- 1.14 M☉
- Radius
- 1.66 R☉
- Luminosity
- 2.7200 L☉
- Age
- 6.7 billion years (Sun: 4.6)
Planetary System
TOI-481 b is the only planet known to orbit TOI-481 so far.
TOI-481 b — Complete Data
| Radius | 11.097 Earth radii (0.990 Jupiter radii) |
|---|---|
| Mass | 486.28 Earth masses (1.530 Jupiter masses) |
| Orbital period | 10.33 days |
| Orbital distance | 0.097 AU |
| Eccentricity | 0.153 |
| Equilibrium temperature | 1,370 K (1,097 °C) |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 585.0 light-years (179.4 parsecs) |
| Constellation | Carina |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-12-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-481 b
Is TOI-481 b habitable?
No — TOI-481 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-481 b?
TOI-481 b is about 585 light-years from Earth in the constellation Carina. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,296,000 years to get there.
How big is TOI-481 b compared to Earth?
TOI-481 b has 11.10 times the radius of Earth and about 486 times its mass.
How long is a year on TOI-481 b?
One orbit around TOI-481 takes 10.3 Earth days — short enough that 35 of its years would fit into one Earth year.
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