HD 114386 b
HD 114386 b is a cold gas giant orbiting HD 114386 in the constellation Centaurus. It lies about 91 light-years from Earth and was discovered in 2003 using the radial velocity method.
Is HD 114386 b in the Habitable Zone?
HD 114386 b orbits beyond the outer edge of the habitable zone of HD 114386. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 114386: 0.420–1.023 AU (conservative: 0.532–0.970 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on HD 114386 b — one full orbit around HD 114386 — lasts 937.7 Earth days, longer than an Earth year. It orbits at an average distance of 1.730 AU. Its orbit is mildly elliptical (eccentricity 0.23).
How Was HD 114386 b Discovered?
HD 114386 b was discovered in 2003 using the radial velocity method, with observations from La Silla Observatory.
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 114386 b?
HD 114386 b is 91.1 light-years (27.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1935. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,603,360 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 114386 b scores 0.16, ranking #4,162 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 114386
HD 114386
- Surface temperature
- 4,836 K (Sun: 5,772 K)
- Mass
- 0.60 M☉
- Radius
- 0.76 R☉
The HD 114386 Planetary System
HD 114386 b is one of 2 known planets in the HD 114386 system. Its siblings:
- HD 114386 c (Cold Gas Giant)
HD 114386 b — Complete Data
| Mass (best estimate) | 362.33 Earth masses |
|---|---|
| Orbital period | 937.70 days |
| Orbital distance | 1.730 AU |
| Eccentricity | 0.230 |
| Earth Similarity Index | 0.16 |
| Distance from Earth | 91.1 light-years (27.9 parsecs) |
| Constellation | Centaurus |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2003 |
Data: NASA Exoplanet Archive, last updated 2018-09-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 114386 b
Is HD 114386 b habitable?
No — HD 114386 b orbits outside the habitable zone of HD 114386 and is likely too cold for liquid water on its surface.
How far away is HD 114386 b?
HD 114386 b is about 91 light-years from Earth in the constellation Centaurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,603,360 years to get there.
How long is a year on HD 114386 b?
One orbit around HD 114386 takes 937.7 Earth days.
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