WASP-83 b
WASP-83 b is a hot Jupiter orbiting the G8 star WASP-83 in the constellation Corvus. It lies about 884 light-years from Earth and was discovered in 2015 using the transit method.
How Big Is WASP-83 b?
WASP-83 b has a radius of 11.66 times that of Earth, or 1.04 times the radius of Jupiter. Its mass is 95.3 times that of Earth, giving it a density of 0.35 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is WASP-83 b in the Habitable Zone?
WASP-83 b orbits inside the inner edge of the habitable zone of WASP-83. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of WASP-83: 0.728–1.728 AU (conservative: 0.922–1.639 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on WASP-83 b
The equilibrium temperature of WASP-83 b is about 1,120 K (847 °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 WASP-83 b — one full orbit around WASP-83 — lasts 4.97 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 WASP-83 b Discovered?
WASP-83 b was discovered in 2015 using the transit method, with observations from SuperWASP.
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-83 b?
WASP-83 b is 884.2 light-years (271.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1142. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 15,561,920 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. WASP-83 b scores 0.08, ranking #4,670 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: WASP-83
WASP-83
- Spectral type
- G8
- Surface temperature
- 5,510 K (Sun: 5,772 K)
- Mass
- 1.11 M☉
- Radius
- 1.05 R☉
- Age
- 5.0 billion years (Sun: 4.6)
Planetary System
WASP-83 b is the only planet known to orbit WASP-83 so far.
WASP-83 b — Complete Data
| Radius | 11.657 Earth radii (1.040 Jupiter radii) |
|---|---|
| Mass | 95.35 Earth masses (0.300 Jupiter masses) |
| Density | 0.35 g/cm³ (Earth: 5.51) |
| Orbital period | 4.97 days |
| Orbital distance | 0.059 AU |
| Equilibrium temperature | 1,120 K (847 °C) |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 884.2 light-years (271.1 parsecs) |
| Constellation | Corvus |
| Discovery method | Transit |
| Discovery facility | SuperWASP |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2015-07-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About WASP-83 b
Is WASP-83 b habitable?
No — WASP-83 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is WASP-83 b?
WASP-83 b is about 884 light-years from Earth in the constellation Corvus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 15,561,920 years to get there.
How big is WASP-83 b compared to Earth?
WASP-83 b has 11.66 times the radius of Earth and about 95.3 times its mass.
How long is a year on WASP-83 b?
One orbit around WASP-83 takes 5.0 Earth days — short enough that 73 of its years would fit into one Earth year.
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