HD 23596 b
HD 23596 b is a cold gas giant orbiting HD 23596 in the constellation Perseus. It lies about 170 light-years from Earth and was discovered in 2003 using the radial velocity method.
Is HD 23596 b in the Habitable Zone?
The position of HD 23596 b relative to the habitable zone of HD 23596 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 23596 b — one full orbit around HD 23596 — lasts 1,535.1 Earth days, longer than an Earth year. It orbits at an average distance of 2.694 AU. Its orbit is mildly elliptical (eccentricity 0.28).
How Was HD 23596 b Discovered?
HD 23596 b was discovered in 2003 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 HD 23596 b?
HD 23596 b is 169.6 light-years (52.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1857. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,984,960 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. HD 23596 b scores 0.33, ranking #927 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 23596
HD 23596 b belongs to a system of 2 stars; it orbits HD 23596.
HD 23596
- Mass
- 1.10 M☉
Planetary System
HD 23596 b is the only planet known to orbit HD 23596 so far.
HD 23596 b — Complete Data
| Mass | 3,786.61 Earth masses (11.914 Jupiter masses) |
|---|---|
| Orbital period | 1,535.12 days |
| Orbital distance | 2.694 AU |
| Eccentricity | 0.282 |
| Earth Similarity Index | 0.33 |
| Distance from Earth | 169.6 light-years (52.0 parsecs) |
| Constellation | Perseus |
| Discovery method | Radial Velocity |
| Discovery facility | Haute-Provence Observatory |
| Discovery year | 2003 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 23596 b
Is HD 23596 b habitable?
HD 23596 b is not known to orbit within the habitable zone of HD 23596, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 23596 b?
HD 23596 b is about 170 light-years from Earth in the constellation Perseus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,984,960 years to get there.
How long is a year on HD 23596 b?
One orbit around HD 23596 takes 1,535.1 Earth days.
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