HIP 98599 b
HIP 98599 b is a cold gas giant orbiting the F7 V star HIP 98599 in the constellation Sagittarius. It lies about 248 light-years from Earth and was discovered in 2026 using the radial velocity method.
Is HIP 98599 b in the Habitable Zone?
The position of HIP 98599 b relative to the habitable zone of HIP 98599 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 98599 b — one full orbit around HIP 98599 — lasts 2,656.0 Earth days, longer than an Earth year. It orbits at an average distance of 3.960 AU. Its orbit is mildly elliptical (eccentricity 0.17).
How Was HIP 98599 b Discovered?
HIP 98599 b was discovered in 2026 using the radial velocity method, with observations from Multiple Facilities.
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 98599 b?
HIP 98599 b is 247.7 light-years (75.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1779. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,359,520 years to make the journey.
The Host Star: HIP 98599
HIP 98599
- Spectral type
- F7 V
- Surface temperature
- 5,978 K (Sun: 5,772 K)
- Mass
- 1.19 M☉
- Age
- 5.2 billion years (Sun: 4.6)
Planetary System
HIP 98599 b is the only planet known to orbit HIP 98599 so far.
HIP 98599 b — Complete Data
| Mass | 2,177.12 Earth masses (6.850 Jupiter masses) |
|---|---|
| Orbital period | 2,656.00 days |
| Orbital distance | 3.960 AU |
| Eccentricity | 0.169 |
| Distance from Earth | 247.7 light-years (75.9 parsecs) |
| Constellation | Sagittarius |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Facilities |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-07-02. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 98599 b
Is HIP 98599 b habitable?
HIP 98599 b is not known to orbit within the habitable zone of HIP 98599, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 98599 b?
HIP 98599 b is about 248 light-years from Earth in the constellation Sagittarius. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,359,520 years to get there.
How long is a year on HIP 98599 b?
One orbit around HIP 98599 takes 2,656.0 Earth days.
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