HIP 66074 b
HIP 66074 b is a cold gas giant orbiting HIP 66074 in the constellation Ursa Minor. It lies about 116 light-years from Earth and was discovered in 2023 using the astrometry method.
Is HIP 66074 b in the Habitable Zone?
HIP 66074 b orbits beyond the outer edge of the habitable zone of HIP 66074. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HIP 66074: 0.314–0.783 AU (conservative: 0.397–0.742 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on HIP 66074 b — one full orbit around HIP 66074 — lasts 310.9 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.799 AU — comparable to the inner Solar System. Its orbit is highly elliptical (eccentricity 0.95), swinging dramatically closer to and farther from its star.
How Was HIP 66074 b Discovered?
HIP 66074 b was discovered in 2023 using the astrometry method, with observations from European Space Agency (ESA) Gaia Satellite.
Astrometry detects a planet by measuring the tiny periodic shift in a star's position on the sky as the star and planet orbit their common center of mass.
How Far Away Is HIP 66074 b?
HIP 66074 b is 115.6 light-years (35.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1911. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,034,560 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 66074 b scores 0.39, ranking #542 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 66074
HIP 66074
- Surface temperature
- 4,300 K (Sun: 5,772 K)
- Mass
- 0.71 M☉
- Radius
- 0.69 R☉
- Luminosity
- 0.1520 L☉
- Age
- 7.9 billion years (Sun: 4.6)
Planetary System
HIP 66074 b is the only planet known to orbit HIP 66074 so far.
HIP 66074 b — Complete Data
| Mass | 1,589.14 Earth masses (5.000 Jupiter masses) |
|---|---|
| Orbital period | 310.90 days |
| Orbital distance | 0.799 AU |
| Eccentricity | 0.948 |
| Earth Similarity Index | 0.39 |
| Distance from Earth | 115.6 light-years (35.4 parsecs) |
| Constellation | Ursa Minor |
| Discovery method | Astrometry |
| Discovery facility | European Space Agency (ESA) Gaia Satellite |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-10-24. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 66074 b
Is HIP 66074 b habitable?
No — HIP 66074 b orbits outside the habitable zone of HIP 66074 and is likely too cold for liquid water on its surface.
How far away is HIP 66074 b?
HIP 66074 b is about 116 light-years from Earth in the constellation Ursa Minor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,034,560 years to get there.
How long is a year on HIP 66074 b?
One orbit around HIP 66074 takes 310.9 Earth days.
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