HIP 55507 b
HIP 55507 b is a cold gas giant orbiting HIP 55507 in the constellation Ursa Major. It lies about 83 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is HIP 55507 b in the Habitable Zone?
The position of HIP 55507 b relative to the habitable zone of HIP 55507 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 55507 b — one full orbit around HIP 55507 — lasts 5,138.4 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 5.062 AU. Its orbit is highly elliptical (eccentricity 0.36), swinging dramatically closer to and farther from its star.
How Was HIP 55507 b Discovered?
HIP 55507 b was discovered in 2022 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 55507 b?
HIP 55507 b is 83.1 light-years (25.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1943. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,462,560 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 55507 b scores 0.08, ranking #4,740 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 55507
HIP 55507
- Mass
- 0.65 M☉
Planetary System
HIP 55507 b is the only planet known to orbit HIP 55507 so far.
HIP 55507 b — Complete Data
| Mass | 2,585.53 Earth masses (8.135 Jupiter masses) |
|---|---|
| Orbital period | 5,138.44 days |
| Orbital distance | 5.062 AU |
| Eccentricity | 0.362 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 83.1 light-years (25.5 parsecs) |
| Constellation | Ursa Major |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 55507 b
Is HIP 55507 b habitable?
HIP 55507 b is not known to orbit within the habitable zone of HIP 55507, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 55507 b?
HIP 55507 b is about 83 light-years from Earth in the constellation Ursa Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,462,560 years to get there.
How long is a year on HIP 55507 b?
One orbit around HIP 55507 takes 5,138.4 Earth days.
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