HD 12484 b
HD 12484 b is a cold gas giant orbiting the F8 star HD 12484 in the constellation Pisces. It lies about 158 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is HD 12484 b in the Habitable Zone?
The position of HD 12484 b relative to the habitable zone of HD 12484 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 12484 b — one full orbit around HD 12484 — lasts 58.8 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.297 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.07).
How Was HD 12484 b Discovered?
HD 12484 b was discovered in 2016 using the radial velocity method, with observations from Haute-Provence 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 12484 b?
HD 12484 b is 157.7 light-years (48.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1869. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,775,520 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 12484 b scores 0.15, ranking #4,221 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 12484
HD 12484
- Spectral type
- F8
- Surface temperature
- 5,920 K (Sun: 5,772 K)
- Mass
- 1.01 M☉
Planetary System
HD 12484 b is the only planet known to orbit HD 12484 so far.
HD 12484 b — Complete Data
| Mass (best estimate) | 947.13 Earth masses |
|---|---|
| Orbital period | 58.83 days |
| Orbital distance | 0.297 AU |
| Eccentricity | 0.070 |
| Earth Similarity Index | 0.15 |
| Distance from Earth | 157.7 light-years (48.3 parsecs) |
| Constellation | Pisces |
| Discovery method | Radial Velocity |
| Discovery facility | Haute-Provence Observatory |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-02-24. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 12484 b
Is HD 12484 b habitable?
HD 12484 b is not known to orbit within the habitable zone of HD 12484, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 12484 b?
HD 12484 b is about 158 light-years from Earth in the constellation Pisces. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,775,520 years to get there.
How long is a year on HD 12484 b?
One orbit around HD 12484 takes 58.8 Earth days.
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