HD 116029 b
HD 116029 b is a cold gas giant orbiting HD 116029 in the constellation Coma Berenices. It lies about 402 light-years from Earth and was discovered in 2011 using the radial velocity method.
Is HD 116029 b in the Habitable Zone?
HD 116029 b orbits inside the inner edge of the habitable zone of HD 116029. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 116029: 2.686–6.543 AU (conservative: 3.403–6.204 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 116029 b — one full orbit around HD 116029 — lasts 670.0 Earth days, longer than an Earth year. It orbits at an average distance of 1.650 AU.
How Was HD 116029 b Discovered?
HD 116029 b was discovered in 2011 using the radial velocity method, with observations from W. M. Keck 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 116029 b?
HD 116029 b is 402.0 light-years (123.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1624. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,075,200 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 116029 b scores 0.25, ranking #3,053 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 116029
HD 116029 b belongs to a system of 2 stars; it orbits HD 116029.
HD 116029
- Surface temperature
- 4,819 K (Sun: 5,772 K)
- Mass
- 0.83 M☉
- Radius
- 4.89 R☉
The HD 116029 Planetary System
HD 116029 b is one of 2 known planets in the HD 116029 system. Its siblings:
- HD 116029 c (Cold Gas Giant)
HD 116029 b — Complete Data
| Mass (best estimate) | 444.96 Earth masses |
|---|---|
| Orbital period | 670.00 days |
| Orbital distance | 1.650 AU |
| Earth Similarity Index | 0.25 |
| Distance from Earth | 402.0 light-years (123.2 parsecs) |
| Constellation | Coma Berenices |
| Discovery method | Radial Velocity |
| Discovery facility | W. M. Keck Observatory |
| Discovery year | 2011 |
Data: NASA Exoplanet Archive, last updated 2018-09-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 116029 b
Is HD 116029 b habitable?
No — HD 116029 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 116029 b?
HD 116029 b is about 402 light-years from Earth in the constellation Coma Berenices. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,075,200 years to get there.
How long is a year on HD 116029 b?
One orbit around HD 116029 takes 670.0 Earth days.
Explore HD 116029 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.
