HD 180314 b
HD 180314 b is a exoplanet orbiting HD 180314 in the constellation Lyra. It lies about 399 light-years from Earth and was discovered in 2010 using the radial velocity method.
Is HD 180314 b in the Habitable Zone?
HD 180314 b orbits inside the inner edge of the habitable zone of HD 180314. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 180314: 5.216–12.653 AU (conservative: 6.607–11.996 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 HD 180314 b — one full orbit around HD 180314 — lasts 394.7 Earth days, longer than an Earth year. It orbits at an average distance of 1.448 AU. Its orbit is mildly elliptical (eccentricity 0.25).
How Was HD 180314 b Discovered?
HD 180314 b was discovered in 2010 using the radial velocity method, with observations from Subaru Telescope.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is HD 180314 b?
HD 180314 b is 399.1 light-years (122.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1627. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,024,160 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. HD 180314 b scores 0.12, ranking #4,329 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 180314
HD 180314
- Surface temperature
- 4,917 K (Sun: 5,772 K)
- Mass
- 2.60 M☉
- Radius
- 9.20 R☉
- Luminosity
- 43.9997 L☉
Planetary System
HD 180314 b is the only planet known to orbit HD 180314 so far.
HD 180314 b — Complete Data
| Mass (best estimate) | 7,216.93 Earth masses |
|---|---|
| Orbital period | 394.73 days |
| Orbital distance | 1.448 AU |
| Eccentricity | 0.247 |
| Earth Similarity Index | 0.12 |
| Distance from Earth | 399.1 light-years (122.4 parsecs) |
| Constellation | Lyra |
| Discovery method | Radial Velocity |
| Discovery facility | Subaru Telescope |
| Discovery year | 2010 |
Data: NASA Exoplanet Archive, last updated 2023-09-19. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 180314 b
Is HD 180314 b habitable?
No — HD 180314 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 180314 b?
HD 180314 b is about 399 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,024,160 years to get there.
How long is a year on HD 180314 b?
One orbit around HD 180314 takes 394.7 Earth days.
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