HD 8535 b
HD 8535 b is a cold gas giant orbiting the G0 V star HD 8535 in the constellation Phoenix. It lies about 181 light-years from Earth and was discovered in 2010 using the radial velocity method.
Is HD 8535 b in the Habitable Zone?
HD 8535 b orbits beyond the outer edge of the habitable zone of HD 8535. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 8535: 0.985–2.302 AU (conservative: 1.248–2.183 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 8535 b — one full orbit around HD 8535 — lasts 1,313.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.450 AU. Its orbit is mildly elliptical (eccentricity 0.15).
How Was HD 8535 b Discovered?
HD 8535 b was discovered in 2010 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 8535 b?
HD 8535 b is 180.8 light-years (55.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1846. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,182,080 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 8535 b scores 0.30, ranking #1,274 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 8535
HD 8535 b belongs to a system of 2 stars; it orbits HD 8535.
HD 8535
- Spectral type
- G0 V
- Surface temperature
- 6,136 K (Sun: 5,772 K)
- Mass
- 1.13 M☉
- Radius
- 1.19 R☉
Planetary System
HD 8535 b is the only planet known to orbit HD 8535 so far.
HD 8535 b — Complete Data
| Mass (best estimate) | 216.12 Earth masses |
|---|---|
| Orbital period | 1,313.00 days |
| Orbital distance | 2.450 AU |
| Eccentricity | 0.150 |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 180.8 light-years (55.4 parsecs) |
| Constellation | Phoenix |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2010 |
Data: NASA Exoplanet Archive, last updated 2015-04-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 8535 b
Is HD 8535 b habitable?
No — HD 8535 b orbits outside the habitable zone of HD 8535 and is likely too cold for liquid water on its surface.
How far away is HD 8535 b?
HD 8535 b is about 181 light-years from Earth in the constellation Phoenix. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,182,080 years to get there.
How long is a year on HD 8535 b?
One orbit around HD 8535 takes 1,313.0 Earth days.
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