HIP 90988 b
The parameters of this planet are disputed or ambiguous in the scientific literature.
HIP 90988 b is a cold gas giant orbiting HIP 90988 in the constellation Telescopium. It lies about 307 light-years from Earth and was discovered in 2021 using the radial velocity method.
Is HIP 90988 b in the Habitable Zone?
The position of HIP 90988 b relative to the habitable zone of HIP 90988 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 90988 b — one full orbit around HIP 90988 — lasts 455.7 Earth days, longer than an Earth year. It orbits at an average distance of 1.360 AU. Its orbit is mildly elliptical (eccentricity 0.08).
How Was HIP 90988 b Discovered?
HIP 90988 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 90988 b?
HIP 90988 b is 306.7 light-years (94.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1720. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,397,920 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 90988 b scores 0.25, ranking #3,069 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 90988
HIP 90988
- Mass
- 1.61 M☉
Planetary System
HIP 90988 b is the only planet known to orbit HIP 90988 so far.
HIP 90988 b — Complete Data
| Mass (best estimate) | 668.08 Earth masses |
|---|---|
| Orbital period | 455.74 days |
| Orbital distance | 1.360 AU |
| Eccentricity | 0.081 |
| Earth Similarity Index | 0.25 |
| Distance from Earth | 306.7 light-years (94.0 parsecs) |
| Constellation | Telescopium |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2023-06-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 90988 b
Is HIP 90988 b habitable?
HIP 90988 b is not known to orbit within the habitable zone of HIP 90988, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 90988 b?
HIP 90988 b is about 307 light-years from Earth in the constellation Telescopium. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,397,920 years to get there.
How long is a year on HIP 90988 b?
One orbit around HIP 90988 takes 455.7 Earth days.
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