HAT-P-67 b
HAT-P-67 b is a hot Jupiter orbiting HAT-P-67 in the constellation Hercules. It lies about 1,212 light-years from Earth and was discovered in 2017 using the transit method.
How Big Is HAT-P-67 b?
HAT-P-67 b has a radius of 23.99 times that of Earth, or 2.14 times the radius of Jupiter. Its mass is 143 times that of Earth, giving it a density of 0.06 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is HAT-P-67 b in the Habitable Zone?
The position of HAT-P-67 b relative to the habitable zone of HAT-P-67 cannot be precisely determined from the available orbital data.
Habitable zone of HAT-P-67: 2.465–5.711 AU (conservative: 3.122–5.414 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 ›
Orbit and Year Length
A year on HAT-P-67 b — one full orbit around HAT-P-67 — lasts 4.81 Earth days, shorter than Mercury's 88-day year.
How Was HAT-P-67 b Discovered?
HAT-P-67 b was discovered in 2017 using the transit method, with observations from HATNet.
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 HAT-P-67 b?
HAT-P-67 b is 1,212.3 light-years (371.7 parsecs) from Earth. Light arriving here tonight left the planet about 1,212 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 21,336,480 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. HAT-P-67 b scores 0.04, ranking #5,323 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HAT-P-67
HAT-P-67 b belongs to a system of 2 stars; it orbits HAT-P-67.
HAT-P-67
- Surface temperature
- 6,640 K (Sun: 5,772 K)
- Mass
- 1.73 M☉
- Radius
- 2.62 R☉
- Luminosity
- 11.9600 L☉
- Age
- 1.5 billion years (Sun: 4.6)
Planetary System
HAT-P-67 b is the only planet known to orbit HAT-P-67 so far.
HAT-P-67 b — Complete Data
| Radius | 23.987 Earth radii (2.140 Jupiter radii) |
|---|---|
| Mass | 143.02 Earth masses (0.450 Jupiter masses) |
| Density | 0.06 g/cm³ (Earth: 5.51) |
| Orbital period | 4.81 days |
| Earth Similarity Index | 0.04 |
| Distance from Earth | 1,212.3 light-years (371.7 parsecs) |
| Constellation | Hercules |
| Discovery method | Transit |
| Discovery facility | HATNet |
| Discovery year | 2017 |
Data: NASA Exoplanet Archive, last updated 2026-02-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HAT-P-67 b
Is HAT-P-67 b habitable?
HAT-P-67 b is not known to orbit within the habitable zone of HAT-P-67, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is HAT-P-67 b?
HAT-P-67 b is about 1,212 light-years from Earth in the constellation Hercules. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 21,336,480 years to get there.
How big is HAT-P-67 b compared to Earth?
HAT-P-67 b has 23.99 times the radius of Earth and about 143 times its mass.
How long is a year on HAT-P-67 b?
One orbit around HAT-P-67 takes 4.8 Earth days — short enough that 76 of its years would fit into one Earth year.
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