HD 233832 b
HD 233832 b is a cold gas giant orbiting HD 233832 in the constellation Ursa Major. It lies about 192 light-years from Earth and was discovered in 2018 using the radial velocity method.
Is HD 233832 b in the Habitable Zone?
HD 233832 b orbits beyond the outer edge of the habitable zone of HD 233832. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 233832: 0.396–0.959 AU (conservative: 0.502–0.909 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 HD 233832 b — one full orbit around HD 233832 — lasts 2,058.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.827 AU. Its orbit is highly elliptical (eccentricity 0.36), swinging dramatically closer to and farther from its star.
How Was HD 233832 b Discovered?
HD 233832 b was discovered in 2018 using the radial velocity method, with observations from Roque de los Muchachos 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 233832 b?
HD 233832 b is 191.6 light-years (58.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1835. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,372,160 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 233832 b scores 0.11, ranking #4,391 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 233832
HD 233832 b belongs to a system of 2 stars; it orbits HD 233832.
HD 233832
- Surface temperature
- 4,981 K (Sun: 5,772 K)
- Mass
- 0.71 M☉
- Radius
- 0.68 R☉
- Age
- 5.4 billion years (Sun: 4.6)
Planetary System
HD 233832 b is the only planet known to orbit HD 233832 so far.
HD 233832 b — Complete Data
| Mass (best estimate) | 565.74 Earth masses |
|---|---|
| Orbital period | 2,058.00 days |
| Orbital distance | 2.827 AU |
| Eccentricity | 0.359 |
| Earth Similarity Index | 0.11 |
| Distance from Earth | 191.6 light-years (58.7 parsecs) |
| Constellation | Ursa Major |
| Discovery method | Radial Velocity |
| Discovery facility | Roque de los Muchachos Observatory |
| Discovery year | 2018 |
Data: NASA Exoplanet Archive, last updated 2019-11-18. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 233832 b
Is HD 233832 b habitable?
No — HD 233832 b orbits outside the habitable zone of HD 233832 and is likely too cold for liquid water on its surface.
How far away is HD 233832 b?
HD 233832 b is about 192 light-years from Earth in the constellation Ursa Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,372,160 years to get there.
How long is a year on HD 233832 b?
One orbit around HD 233832 takes 2,058.0 Earth days.
Explore HD 233832 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
