HD 147379 b
HD 147379 b is a Neptune-like planet orbiting the M0.0 V star HD 147379 in the constellation Draco. It lies about 35 light-years from Earth and was discovered in 2017 using the radial velocity method.
Is HD 147379 b in the Habitable Zone?
The position of HD 147379 b relative to the habitable zone of HD 147379 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 147379 b — one full orbit around HD 147379 — lasts 86.6 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.06).
How Was HD 147379 b Discovered?
HD 147379 b was discovered in 2017 using the radial velocity method, with observations from Calar Alto 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 147379 b?
HD 147379 b is 35.1 light-years (10.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1991. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 617,760 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 147379 b scores 0.52, ranking #224 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 147379
HD 147379 b belongs to a system of 2 stars; it orbits HD 147379.
HD 147379
- Spectral type
- M0.0 V
- Surface temperature
- 4,090 K (Sun: 5,772 K)
- Mass
- 0.58 M☉
Planetary System
HD 147379 b is the only planet known to orbit HD 147379 so far.
HD 147379 b — Complete Data
| Mass (best estimate) | 21.60 Earth masses |
|---|---|
| Orbital period | 86.58 days |
| Eccentricity | 0.063 |
| Earth Similarity Index | 0.52 |
| Distance from Earth | 35.1 light-years (10.8 parsecs) |
| Constellation | Draco |
| Discovery method | Radial Velocity |
| Discovery facility | Calar Alto Observatory |
| Discovery year | 2017 |
Data: NASA Exoplanet Archive, last updated 2023-09-19. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 147379 b
Is HD 147379 b habitable?
HD 147379 b is not known to orbit within the habitable zone of HD 147379, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is HD 147379 b?
HD 147379 b is about 35 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 617,760 years to get there.
How long is a year on HD 147379 b?
One orbit around HD 147379 takes 86.6 Earth days.
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