TOI-6008 b
TOI-6008 b is a terrestrial planet orbiting the M5.0 star TOI-6008 in the constellation Cygnus. It lies about 75 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-6008 b?
TOI-6008 b has a radius of 1.03 times that of Earth. Its mass is 4.0 times that of Earth.
Is TOI-6008 b in the Habitable Zone?
TOI-6008 b orbits inside the inner edge of the habitable zone of TOI-6008. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-6008: 0.056–0.149 AU (conservative: 0.071–0.141 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-6008 b
The equilibrium temperature of TOI-6008 b is about 707 K (434 °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 41.50 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-6008 b — one full orbit around TOI-6008 — lasts just 20.6 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.011 AU — closer to its star than Mercury is to the Sun.
How Was TOI-6008 b Discovered?
TOI-6008 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-6008 b?
TOI-6008 b is 75.3 light-years (23.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1951. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,325,280 years to make the journey.
The Host Star: TOI-6008
TOI-6008
- Spectral type
- M5.0
- Surface temperature
- 3,075 K (Sun: 5,772 K)
- Mass
- 0.23 M☉
- Radius
- 0.24 R☉
- Luminosity
- 0.0047 L☉
- Age
- 3.0 billion years (Sun: 4.6)
Planetary System
TOI-6008 b is the only planet known to orbit TOI-6008 so far.
TOI-6008 b — Complete Data
| Radius | 1.030 Earth radii (0.092 Jupiter radii) |
|---|---|
| Mass | 4.00 Earth masses (0.013 Jupiter masses) |
| Orbital period | 0.86 days |
| Orbital distance | 0.011 AU |
| Equilibrium temperature | 707 K (434 °C) |
| Stellar irradiation | 41.50× Earth |
| Distance from Earth | 75.3 light-years (23.1 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-05-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6008 b
Is TOI-6008 b habitable?
No — TOI-6008 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-6008 b?
TOI-6008 b is about 75 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,325,280 years to get there.
How big is TOI-6008 b compared to Earth?
TOI-6008 b has 1.03 times the radius of Earth and about 4.0 times its mass.
How long is a year on TOI-6008 b?
One orbit around TOI-6008 takes 0.9 Earth days — short enough that 426 of its years would fit into one Earth year.
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