HIP 67522 b
HIP 67522 b is a hot Jupiter orbiting HIP 67522 in the constellation Centaurus. It lies about 415 light-years from Earth and was discovered in 2020 using the transit method.
How Big Is HIP 67522 b?
HIP 67522 b has a radius of 9.99 times that of Earth, or 0.89 times the radius of Jupiter.
Is HIP 67522 b in the Habitable Zone?
HIP 67522 b orbits inside the inner edge of the habitable zone of HIP 67522. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HIP 67522: 0.999–2.360 AU (conservative: 1.265–2.238 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on HIP 67522 b
The equilibrium temperature of HIP 67522 b is about 1,175 K (902 °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 HIP 67522 b — one full orbit around HIP 67522 — lasts 6.96 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.075 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was HIP 67522 b Discovered?
HIP 67522 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 HIP 67522 b?
HIP 67522 b is 415.1 light-years (127.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1611. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,305,760 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. HIP 67522 b scores 0.09, ranking #4,522 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 67522
HIP 67522
- Surface temperature
- 5,675 K (Sun: 5,772 K)
- Mass
- 1.22 M☉
- Radius
- 1.38 R☉
- Luminosity
- 1.7500 L☉
- Age
- 0.0 billion years (Sun: 4.6)
The HIP 67522 Planetary System
HIP 67522 b is one of 2 known planets in the HIP 67522 system. Its siblings:
- HIP 67522 c (Cold Gas Giant)
HIP 67522 b — Complete Data
| Radius | 9.987 Earth radii (0.891 Jupiter radii) |
|---|---|
| Orbital period | 6.96 days |
| Orbital distance | 0.075 AU |
| Eccentricity | 0.064 |
| Equilibrium temperature | 1,175 K (902 °C) |
| Earth Similarity Index | 0.09 |
| Distance from Earth | 415.1 light-years (127.3 parsecs) |
| Constellation | Centaurus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2024-09-28. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 67522 b
Is HIP 67522 b habitable?
No — HIP 67522 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HIP 67522 b?
HIP 67522 b is about 415 light-years from Earth in the constellation Centaurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,305,760 years to get there.
How big is HIP 67522 b compared to Earth?
HIP 67522 b has 9.99 times the radius of Earth.
How long is a year on HIP 67522 b?
One orbit around HIP 67522 takes 7.0 Earth days — short enough that 52 of its years would fit into one Earth year.
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