WASP-69 b
WASP-69 b is a hot Jupiter orbiting the K star WASP-69 in the constellation Aquarius. It lies about 163 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is WASP-69 b?
WASP-69 b has a radius of 11.21 times that of Earth, or 1.00 times the radius of Jupiter. Its mass is 82.6 times that of Earth.
Is WASP-69 b in the Habitable Zone?
WASP-69 b orbits inside the inner edge of the habitable zone of WASP-69. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of WASP-69: 0.454–1.108 AU (conservative: 0.575–1.050 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on WASP-69 b
The equilibrium temperature of WASP-69 b is about 971 K (698 °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-69 b — one full orbit around WASP-69 — lasts 3.87 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.045 AU — closer to its star than Mercury is to the Sun.
How Was WASP-69 b Discovered?
WASP-69 b was discovered in 2014 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-69 b?
WASP-69 b is 162.9 light-years (50.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1864. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,867,040 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-69 b scores 0.08, ranking #4,714 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: WASP-69
WASP-69
- Spectral type
- K
- Surface temperature
- 4,792 K (Sun: 5,772 K)
- Mass
- 0.83 M☉
- Radius
- 0.80 R☉
- Luminosity
- 0.3300 L☉
- Age
- 1.8 billion years (Sun: 4.6)
Planetary System
WASP-69 b is the only planet known to orbit WASP-69 so far.
WASP-69 b — Complete Data
| Radius | 11.210 Earth radii (1.000 Jupiter radii) |
|---|---|
| Mass | 82.58 Earth masses (0.260 Jupiter masses) |
| Orbital period | 3.87 days |
| Orbital distance | 0.045 AU |
| Equilibrium temperature | 971 K (698 °C) |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 162.9 light-years (50.0 parsecs) |
| Constellation | Aquarius |
| Discovery method | Transit |
| Discovery facility | SuperWASP |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2025-08-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About WASP-69 b
Is WASP-69 b habitable?
No — WASP-69 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is WASP-69 b?
WASP-69 b is about 163 light-years from Earth in the constellation Aquarius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,867,040 years to get there.
How big is WASP-69 b compared to Earth?
WASP-69 b has 11.21 times the radius of Earth and about 82.6 times its mass.
How long is a year on WASP-69 b?
One orbit around WASP-69 takes 3.9 Earth days — short enough that 94 of its years would fit into one Earth year.
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