HD 108341 b
HD 108341 b is a cold gas giant orbiting the K2 V star HD 108341 in the constellation Musca. It lies about 160 light-years from Earth and was discovered in 2014 using the radial velocity method.
Is HD 108341 b in the Habitable Zone?
HD 108341 b orbits beyond the outer edge of the habitable zone of HD 108341. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 108341: 0.483–1.163 AU (conservative: 0.612–1.103 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 108341 b — one full orbit around HD 108341 — lasts 1,129.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.000 AU. Its orbit is highly elliptical (eccentricity 0.85), swinging dramatically closer to and farther from its star.
How Was HD 108341 b Discovered?
HD 108341 b was discovered in 2014 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 108341 b?
HD 108341 b is 159.5 light-years (48.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1867. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,807,200 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 108341 b scores 0.23, ranking #3,482 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 108341
HD 108341 b belongs to a system of 2 stars; it orbits HD 108341.
HD 108341
- Spectral type
- K2 V
- Surface temperature
- 5,122 K (Sun: 5,772 K)
- Mass
- 0.84 M☉
- Radius
- 0.79 R☉
- Age
- 4.9 billion years (Sun: 4.6)
Planetary System
HD 108341 b is the only planet known to orbit HD 108341 so far.
HD 108341 b — Complete Data
| Mass (best estimate) | 1,112.40 Earth masses |
|---|---|
| Orbital period | 1,129.00 days |
| Orbital distance | 2.000 AU |
| Eccentricity | 0.850 |
| Earth Similarity Index | 0.23 |
| Distance from Earth | 159.5 light-years (48.9 parsecs) |
| Constellation | Musca |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2015-01-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 108341 b
Is HD 108341 b habitable?
No — HD 108341 b orbits outside the habitable zone of HD 108341 and is likely too cold for liquid water on its surface.
How far away is HD 108341 b?
HD 108341 b is about 160 light-years from Earth in the constellation Musca. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,807,200 years to get there.
How long is a year on HD 108341 b?
One orbit around HD 108341 takes 1,129.0 Earth days.
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