HD 35843 b
HD 35843 b is a super-Earth orbiting HD 35843 in the constellation Pictor. It lies about 227 light-years from Earth and was discovered in 2025 using the radial velocity method.
Is HD 35843 b in the Habitable Zone?
HD 35843 b orbits inside the inner edge of the habitable zone of HD 35843. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 35843: 0.654–1.546 AU (conservative: 0.829–1.466 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on HD 35843 b — one full orbit around HD 35843 — lasts 9.90 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.088 AU — closer to its star than Mercury is to the Sun.
How Was HD 35843 b Discovered?
HD 35843 b was discovered in 2025 using the radial velocity method, with observations from Paranal 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 35843 b?
HD 35843 b is 227.0 light-years (69.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1799. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,995,200 years to make the journey.
The Host Star: HD 35843
HD 35843
- Surface temperature
- 5,666 K (Sun: 5,772 K)
- Mass
- 0.94 M☉
- Radius
- 0.90 R☉
- Luminosity
- 0.7500 L☉
- Age
- 2.5 billion years (Sun: 4.6)
The HD 35843 Planetary System
HD 35843 b is one of 2 known planets in the HD 35843 system. Its siblings:
- HD 35843 c (Super Earth)
HD 35843 b — Complete Data
| Mass (best estimate) | 5.84 Earth masses |
|---|---|
| Orbital period | 9.90 days |
| Orbital distance | 0.088 AU |
| Distance from Earth | 227.0 light-years (69.6 parsecs) |
| Constellation | Pictor |
| Discovery method | Radial Velocity |
| Discovery facility | Paranal Observatory |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-05-13. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 35843 b
Is HD 35843 b habitable?
No — HD 35843 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 35843 b?
HD 35843 b is about 227 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,995,200 years to get there.
How long is a year on HD 35843 b?
One orbit around HD 35843 takes 9.9 Earth days — short enough that 37 of its years would fit into one Earth year.
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