HIP 65407 b
HIP 65407 b is a cold gas giant orbiting the K0 star HIP 65407 in the constellation Canes Venatici. It lies about 202 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is HIP 65407 b in the Habitable Zone?
The position of HIP 65407 b relative to the habitable zone of HIP 65407 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HIP 65407 b — one full orbit around HIP 65407 — lasts 28.1 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.177 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.14).
How Was HIP 65407 b Discovered?
HIP 65407 b was discovered in 2016 using the radial velocity method, with observations from Haute-Provence Observatory.
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 65407 b?
HIP 65407 b is 201.5 light-years (61.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1825. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,546,400 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 65407 b scores 0.11, ranking #4,371 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 65407
HIP 65407
- Spectral type
- K0
- Surface temperature
- 5,460 K (Sun: 5,772 K)
- Mass
- 0.93 M☉
The HIP 65407 Planetary System
HIP 65407 b is one of 2 known planets in the HIP 65407 system. Its siblings:
- HIP 65407 c (Cold Gas Giant)
HIP 65407 b — Complete Data
| Mass (best estimate) | 136.03 Earth masses |
|---|---|
| Orbital period | 28.13 days |
| Orbital distance | 0.177 AU |
| Eccentricity | 0.140 |
| Earth Similarity Index | 0.11 |
| Distance from Earth | 201.5 light-years (61.8 parsecs) |
| Constellation | Canes Venatici |
| Discovery method | Radial Velocity |
| Discovery facility | Haute-Provence Observatory |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-02-24. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 65407 b
Is HIP 65407 b habitable?
HIP 65407 b is not known to orbit within the habitable zone of HIP 65407, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HIP 65407 b?
HIP 65407 b is about 202 light-years from Earth in the constellation Canes Venatici. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,546,400 years to get there.
How long is a year on HIP 65407 b?
One orbit around HIP 65407 takes 28.1 Earth days — short enough that 13 of its years would fit into one Earth year.
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