HD 110082 b
HD 110082 b is a sub-Neptune orbiting the F8 V star HD 110082 in the constellation Octans. It lies about 343 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is HD 110082 b?
HD 110082 b has a radius of 3.20 times that of Earth.
Is HD 110082 b in the Habitable Zone?
HD 110082 b orbits inside the inner edge of the habitable zone of HD 110082. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 110082: 1.011–2.359 AU (conservative: 1.280–2.236 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 110082 b — one full orbit around HD 110082 — lasts 10.2 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.113 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.20).
How Was HD 110082 b Discovered?
HD 110082 b was discovered in 2021 using the transit method, with observations from Transiting Exoplanet Survey Satellite (TESS).
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is HD 110082 b?
HD 110082 b is 342.8 light-years (105.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1684. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,033,280 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 110082 b scores 0.21, ranking #3,773 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 110082
HD 110082 b belongs to a system of 2 stars; it orbits HD 110082.
HD 110082
- Spectral type
- F8 V
- Surface temperature
- 6,200 K (Sun: 5,772 K)
- Mass
- 1.21 M☉
- Radius
- 1.19 R☉
- Luminosity
- 1.9100 L☉
- Age
- 0.3 billion years (Sun: 4.6)
Planetary System
HD 110082 b is the only planet known to orbit HD 110082 so far.
HD 110082 b — Complete Data
| Radius | 3.200 Earth radii (0.285 Jupiter radii) |
|---|---|
| Orbital period | 10.18 days |
| Orbital distance | 0.113 AU |
| Eccentricity | 0.200 |
| Earth Similarity Index | 0.21 |
| Distance from Earth | 342.8 light-years (105.1 parsecs) |
| Constellation | Octans |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2021-02-25. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 110082 b
Is HD 110082 b habitable?
No — HD 110082 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 110082 b?
HD 110082 b is about 343 light-years from Earth in the constellation Octans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,033,280 years to get there.
How big is HD 110082 b compared to Earth?
HD 110082 b has 3.20 times the radius of Earth.
How long is a year on HD 110082 b?
One orbit around HD 110082 takes 10.2 Earth days — short enough that 36 of its years would fit into one Earth year.
Explore HD 110082 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.
