HD 67087 b
HD 67087 b is a cold gas giant orbiting the F8 V star HD 67087 in the constellation Gemini. It lies about 250 light-years from Earth and was discovered in 2015 using the radial velocity method.
Is HD 67087 b in the Habitable Zone?
HD 67087 b orbits inside the inner edge of the habitable zone of HD 67087. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 67087: 1.351–3.145 AU (conservative: 1.712–2.982 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 67087 b — one full orbit around HD 67087 — lasts 352.2 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 1.080 AU — comparable to the inner Solar System. Its orbit is mildly elliptical (eccentricity 0.17).
How Was HD 67087 b Discovered?
HD 67087 b was discovered in 2015 using the radial velocity method, with observations from Multiple Observatories.
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 67087 b?
HD 67087 b is 249.6 light-years (76.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1777. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,392,960 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 67087 b scores 0.30, ranking #1,472 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 67087
HD 67087
- Spectral type
- F8 V
- Surface temperature
- 6,330 K (Sun: 5,772 K)
- Mass
- 1.36 M☉
- Radius
- 1.55 R☉
- Luminosity
- 3.4674 L☉
- Age
- 1.5 billion years (Sun: 4.6)
The HD 67087 Planetary System
HD 67087 b is one of 2 known planets in the HD 67087 system. Its siblings:
- HD 67087 c (Cold Gas Giant)
HD 67087 b — Complete Data
| Mass (best estimate) | 973.00 Earth masses |
|---|---|
| Orbital period | 352.20 days |
| Orbital distance | 1.080 AU |
| Eccentricity | 0.170 |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 249.6 light-years (76.5 parsecs) |
| Constellation | Gemini |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2015-04-01. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 67087 b
Is HD 67087 b habitable?
No — HD 67087 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 67087 b?
HD 67087 b is about 250 light-years from Earth in the constellation Gemini. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,392,960 years to get there.
How long is a year on HD 67087 b?
One orbit around HD 67087 takes 352.2 Earth days.
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