WASP-108 b
WASP-108 b is a hot Jupiter orbiting the F9 star WASP-108 in the constellation Centaurus. It lies about 844 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is WASP-108 b?
WASP-108 b has a radius of 15.13 times that of Earth, or 1.35 times the radius of Jupiter.
Is WASP-108 b in the Habitable Zone?
The position of WASP-108 b relative to the habitable zone of WASP-108 cannot be precisely determined from the available orbital data.
Temperature on WASP-108 b
The equilibrium temperature of WASP-108 b is about 1,589 K (1,316 °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.
How Was WASP-108 b Discovered?
WASP-108 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 WASP-108 b?
WASP-108 b is 844.0 light-years (258.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1182. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 14,854,400 years to make the journey.
The Host Star: WASP-108
WASP-108
- Spectral type
- F9
Planetary System
WASP-108 b is the only planet known to orbit WASP-108 so far.
WASP-108 b — Complete Data
| Radius | 15.132 Earth radii (1.350 Jupiter radii) |
|---|---|
| Density | 0.48 g/cm³ (Earth: 5.51) |
| Equilibrium temperature | 1,589 K (1,316 °C) |
| Distance from Earth | 844.0 light-years (258.8 parsecs) |
| Constellation | Centaurus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2025-12-18. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About WASP-108 b
Is WASP-108 b habitable?
WASP-108 b is not known to orbit within the habitable zone of WASP-108, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is WASP-108 b?
WASP-108 b is about 844 light-years from Earth in the constellation Centaurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 14,854,400 years to get there.
How big is WASP-108 b compared to Earth?
WASP-108 b has 15.13 times the radius of Earth.
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