HIP 107772 b
HIP 107772 b is a Neptune-like planet orbiting the M0 V star HIP 107772 in the constellation Grus. It lies about 77 light-years from Earth and was discovered in 2020 using the radial velocity method.
Is HIP 107772 b in the Habitable Zone?
The position of HIP 107772 b relative to the habitable zone of HIP 107772 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 107772 b — one full orbit around HIP 107772 — lasts 55.2 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.243 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.18).
How Was HIP 107772 b Discovered?
HIP 107772 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 107772 b?
HIP 107772 b is 77.1 light-years (23.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1949. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,356,960 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. HIP 107772 b scores 0.59, ranking #143 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 107772
HIP 107772
- Spectral type
- M0 V
- Mass
- 0.63 M☉
Planetary System
HIP 107772 b is the only planet known to orbit HIP 107772 so far.
HIP 107772 b — Complete Data
| Mass (best estimate) | 12.90 Earth masses |
|---|---|
| Orbital period | 55.20 days |
| Orbital distance | 0.243 AU |
| Eccentricity | 0.180 |
| Earth Similarity Index | 0.59 |
| Distance from Earth | 77.1 light-years (23.6 parsecs) |
| Constellation | Grus |
| 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 107772 b
Is HIP 107772 b habitable?
HIP 107772 b is not known to orbit within the habitable zone of HIP 107772, and as a Neptune-like planet it is an unlikely candidate for life as we know it.
How far away is HIP 107772 b?
HIP 107772 b is about 77 light-years from Earth in the constellation Grus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,356,960 years to get there.
How long is a year on HIP 107772 b?
One orbit around HIP 107772 takes 55.2 Earth days.
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