WASP-64 b
WASP-64 b is a hot Jupiter orbiting the G7 star WASP-64 in the constellation Canis Major. It lies about 1,207 light-years from Earth and was discovered in 2012 using the transit method.
How Big Is WASP-64 b?
WASP-64 b has a radius of 14.25 times that of Earth, or 1.27 times the radius of Jupiter. Its mass is 404 times that of Earth, giving it a density of 0.82 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is WASP-64 b in the Habitable Zone?
WASP-64 b orbits inside the inner edge of the habitable zone of WASP-64. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of WASP-64: 0.748–1.782 AU (conservative: 0.947–1.690 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Temperature on WASP-64 b
The equilibrium temperature of WASP-64 b is about 1,689 K (1,416 °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-64 b — one full orbit around WASP-64 — lasts just 37.8 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.026 AU — closer to its star than Mercury is to the Sun.
How Was WASP-64 b Discovered?
WASP-64 b was discovered in 2012 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-64 b?
WASP-64 b is 1,206.5 light-years (369.9 parsecs) from Earth. Light arriving here tonight left the planet about 1,207 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 21,234,400 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-64 b scores 0.06, ranking #5,077 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: WASP-64
WASP-64 b belongs to a system of 2 stars; it orbits WASP-64.
WASP-64
- Spectral type
- G7
- Surface temperature
- 5,400 K (Sun: 5,772 K)
- Mass
- 1.00 M☉
- Radius
- 1.06 R☉
- Luminosity
- 0.9506 L☉
- Age
- 1.2 billion years (Sun: 4.6)
Planetary System
WASP-64 b is the only planet known to orbit WASP-64 so far.
WASP-64 b — Complete Data
| Radius | 14.247 Earth radii (1.271 Jupiter radii) |
|---|---|
| Mass | 403.95 Earth masses (1.271 Jupiter masses) |
| Density | 0.82 g/cm³ (Earth: 5.51) |
| Orbital period | 1.57 days |
| Orbital distance | 0.026 AU |
| Equilibrium temperature | 1,689 K (1,416 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 1,206.5 light-years (369.9 parsecs) |
| Constellation | Canis Major |
| Discovery method | Transit |
| Discovery facility | SuperWASP |
| Discovery year | 2012 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About WASP-64 b
Is WASP-64 b habitable?
No — WASP-64 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is WASP-64 b?
WASP-64 b is about 1,207 light-years from Earth in the constellation Canis Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 21,234,400 years to get there.
How big is WASP-64 b compared to Earth?
WASP-64 b has 14.25 times the radius of Earth and about 404 times its mass.
How long is a year on WASP-64 b?
One orbit around WASP-64 takes 1.6 Earth days — short enough that 232 of its years would fit into one Earth year.
Explore WASP-64 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
