HIP 38594 b
HIP 38594 b is a super-Earth orbiting the M0 star HIP 38594 in the constellation Puppis. It lies about 58 light-years from Earth and was discovered in 2020 using the radial velocity method.
Is HIP 38594 b in the Habitable Zone?
The position of HIP 38594 b relative to the habitable zone of HIP 38594 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 38594 b — one full orbit around HIP 38594 — lasts 60.7 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.256 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.17).
How Was HIP 38594 b Discovered?
HIP 38594 b was discovered in 2020 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 HIP 38594 b?
HIP 38594 b is 58.0 light-years (17.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1968. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,020,800 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. HIP 38594 b scores 0.65, ranking #94 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 38594
HIP 38594 b belongs to a system of 2 stars; it orbits HIP 38594.
HIP 38594
- Spectral type
- M0
- Mass
- 0.61 M☉
The HIP 38594 Planetary System
HIP 38594 b is one of 2 known planets in the HIP 38594 system. Its siblings:
- HIP 38594 c (Neptune-like)
HIP 38594 b — Complete Data
| Mass (best estimate) | 8.10 Earth masses |
|---|---|
| Orbital period | 60.72 days |
| Orbital distance | 0.256 AU |
| Eccentricity | 0.170 |
| Earth Similarity Index | 0.65 |
| Distance from Earth | 58.0 light-years (17.8 parsecs) |
| Constellation | Puppis |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2020 |
Data: NASA Exoplanet Archive, last updated 2020-09-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 38594 b
Is HIP 38594 b habitable?
HIP 38594 b is not known to orbit within the habitable zone of HIP 38594, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is HIP 38594 b?
HIP 38594 b is about 58 light-years from Earth in the constellation Puppis. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,020,800 years to get there.
How long is a year on HIP 38594 b?
One orbit around HIP 38594 takes 60.7 Earth days.
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