HD 25015 b
HD 25015 b is a cold gas giant orbiting HD 25015 in the constellation Eridanus. It lies about 122 light-years from Earth and was discovered in 2019 using the radial velocity method.
Is HD 25015 b in the Habitable Zone?
The position of HD 25015 b relative to the habitable zone of HD 25015 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 25015 b — one full orbit around HD 25015 — lasts 6,134.4 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 6.248 AU. Its orbit is highly elliptical (eccentricity 0.34), swinging dramatically closer to and farther from its star.
How Was HD 25015 b Discovered?
HD 25015 b was discovered in 2019 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 25015 b?
HD 25015 b is 122.1 light-years (37.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1904. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,148,960 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 25015 b scores 0.08, ranking #4,613 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 25015
HD 25015
- Mass
- 0.86 M☉
Planetary System
HD 25015 b is the only planet known to orbit HD 25015 so far.
HD 25015 b — Complete Data
| Mass | 2,884.93 Earth masses (9.077 Jupiter masses) |
|---|---|
| Orbital period | 6,134.43 days |
| Orbital distance | 6.248 AU |
| Eccentricity | 0.341 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 122.1 light-years (37.4 parsecs) |
| Constellation | Eridanus |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 25015 b
Is HD 25015 b habitable?
HD 25015 b is not known to orbit within the habitable zone of HD 25015, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 25015 b?
HD 25015 b is about 122 light-years from Earth in the constellation Eridanus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,148,960 years to get there.
How long is a year on HD 25015 b?
One orbit around HD 25015 takes 6,134.4 Earth days.
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