HD 167677 b
HD 167677 b is a cold gas giant orbiting the G5 V star HD 167677 in the constellation Serpens. It lies about 177 light-years from Earth and was discovered in 2023 using the radial velocity method.
Is HD 167677 b in the Habitable Zone?
The position of HD 167677 b relative to the habitable zone of HD 167677 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 167677 b — one full orbit around HD 167677 — lasts 1,820.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.877 AU. Its orbit is mildly elliptical (eccentricity 0.18).
How Was HD 167677 b Discovered?
HD 167677 b was discovered in 2023 using the radial velocity method, with observations from Multiple Facilities.
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 167677 b?
HD 167677 b is 177.2 light-years (54.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1849. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,118,720 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 167677 b scores 0.15, ranking #4,196 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 167677
HD 167677
- Spectral type
- G5 V
- Surface temperature
- 5,474 K (Sun: 5,772 K)
- Mass
- 0.96 M☉
Planetary System
HD 167677 b is the only planet known to orbit HD 167677 so far.
HD 167677 b — Complete Data
| Mass | 905.81 Earth masses (2.850 Jupiter masses) |
|---|---|
| Orbital period | 1,820.00 days |
| Orbital distance | 2.877 AU |
| Eccentricity | 0.182 |
| Earth Similarity Index | 0.15 |
| Distance from Earth | 177.2 light-years (54.3 parsecs) |
| Constellation | Serpens |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Facilities |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 167677 b
Is HD 167677 b habitable?
HD 167677 b is not known to orbit within the habitable zone of HD 167677, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 167677 b?
HD 167677 b is about 177 light-years from Earth in the constellation Serpens. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,118,720 years to get there.
How long is a year on HD 167677 b?
One orbit around HD 167677 takes 1,820.0 Earth days.
Explore HD 167677 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
