HAT-P-5 b
HAT-P-5 b is a hot Jupiter orbiting HAT-P-5 in the constellation Lyra. It lies about 989 light-years from Earth and was discovered in 2007 using the transit method.
How Big Is HAT-P-5 b?
HAT-P-5 b has a radius of 13.56 times that of Earth, or 1.21 times the radius of Jupiter. Its mass is 311 times that of Earth.
Is HAT-P-5 b in the Habitable Zone?
The position of HAT-P-5 b relative to the habitable zone of HAT-P-5 cannot be precisely determined from the available orbital data.
Habitable zone of HAT-P-5: 0.884–2.074 AU (conservative: 1.120–1.967 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-5 b — one full orbit around HAT-P-5 — lasts 2.79 Earth days, shorter than Mercury's 88-day year.
How Was HAT-P-5 b Discovered?
HAT-P-5 b was discovered in 2007 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-5 b?
HAT-P-5 b is 989.3 light-years (303.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1037. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 17,411,680 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-5 b scores 0.07, ranking #4,993 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HAT-P-5
HAT-P-5
- Surface temperature
- 5,960 K (Sun: 5,772 K)
- Mass
- 1.04 M☉
- Radius
- 1.12 R☉
Planetary System
HAT-P-5 b is the only planet known to orbit HAT-P-5 so far.
HAT-P-5 b — Complete Data
| Radius | 13.563 Earth radii (1.210 Jupiter radii) |
|---|---|
| Mass | 311.47 Earth masses (0.980 Jupiter masses) |
| Orbital period | 2.79 days |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 989.3 light-years (303.3 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | HATNet |
| Discovery year | 2007 |
Data: NASA Exoplanet Archive, last updated 2018-05-22. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HAT-P-5 b
Is HAT-P-5 b habitable?
HAT-P-5 b is not known to orbit within the habitable zone of HAT-P-5, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is HAT-P-5 b?
HAT-P-5 b is about 989 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 17,411,680 years to get there.
How big is HAT-P-5 b compared to Earth?
HAT-P-5 b has 13.56 times the radius of Earth and about 311 times its mass.
How long is a year on HAT-P-5 b?
One orbit around HAT-P-5 takes 2.8 Earth days — short enough that 131 of its years would fit into one Earth year.
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