HIP 56640 b
HIP 56640 b is a cold gas giant orbiting HIP 56640 in the constellation Centaurus. It lies about 399 light-years from Earth and was discovered in 2021 using the radial velocity method.
Is HIP 56640 b in the Habitable Zone?
The position of HIP 56640 b relative to the habitable zone of HIP 56640 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 56640 b — one full orbit around HIP 56640 — lasts 2,675.6 Earth days, longer than an Earth year. It orbits at an average distance of 4.550 AU. Its orbit is mildly elliptical (eccentricity 0.12).
How Was HIP 56640 b Discovered?
HIP 56640 b was discovered in 2021 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 56640 b?
HIP 56640 b is 399.0 light-years (122.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1627. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,022,400 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 56640 b scores 0.36, ranking #687 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 56640
HIP 56640
- Mass
- 1.75 M☉
Planetary System
HIP 56640 b is the only planet known to orbit HIP 56640 so far.
HIP 56640 b — Complete Data
| Mass | 2,151.70 Earth masses (6.770 Jupiter masses) |
|---|---|
| Orbital period | 2,675.58 days |
| Orbital distance | 4.550 AU |
| Eccentricity | 0.118 |
| Earth Similarity Index | 0.36 |
| Distance from Earth | 399.0 light-years (122.3 parsecs) |
| Constellation | Centaurus |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 56640 b
Is HIP 56640 b habitable?
HIP 56640 b is not known to orbit within the habitable zone of HIP 56640, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 56640 b?
HIP 56640 b is about 399 light-years from Earth in the constellation Centaurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,022,400 years to get there.
How long is a year on HIP 56640 b?
One orbit around HIP 56640 takes 2,675.6 Earth days.
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