BEBOP-3 b
BEBOP-3 b is a cold gas giant orbiting BEBOP-3 in the constellation Camelopardalis. It lies about 388 light-years from Earth and was discovered in 2025 using the radial velocity method. It orbits within the habitable zone of its star — the region where liquid water could exist on a planet's surface.
Is BEBOP-3 b in the Habitable Zone?
BEBOP-3 b orbits inside the conservative habitable zone of BEBOP-3 — the region where a rocky planet could sustain liquid water on its surface. This makes it one of the most interesting known exoplanets in the search for life.
Habitable zone of BEBOP-3: 1.139–2.667 AU (conservative: 1.443–2.529 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 BEBOP-3 b — one full orbit around BEBOP-3 — lasts 547.0 Earth days, longer than an Earth year. It orbits at an average distance of 1.444 AU. Its orbit is mildly elliptical (eccentricity 0.25).
How Was BEBOP-3 b Discovered?
BEBOP-3 b was discovered in 2025 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 BEBOP-3 b?
BEBOP-3 b is 388.3 light-years (119.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1638. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,834,080 years to make the journey.
The Host Star: BEBOP-3
BEBOP-3 b is a circumbinary planet — it orbits around two stars at once, like Tatooine in Star Wars.
BEBOP-3
- Surface temperature
- 6,033 K (Sun: 5,772 K)
- Mass
- 1.08 M☉
- Radius
- 1.41 R☉
Planetary System
BEBOP-3 b is the only planet known to orbit BEBOP-3 so far.
BEBOP-3 b — Complete Data
| Mass (best estimate) | 177.35 Earth masses |
|---|---|
| Orbital period | 547.00 days |
| Orbital distance | 1.444 AU |
| Eccentricity | 0.247 |
| Distance from Earth | 388.3 light-years (119.1 parsecs) |
| Constellation | Camelopardalis |
| Discovery method | Radial Velocity |
| Discovery facility | Haute-Provence Observatory |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-08-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About BEBOP-3 b
Is BEBOP-3 b habitable?
BEBOP-3 b orbits within the habitable zone of BEBOP-3, the region where liquid water could exist on a planet's surface. It sits in the conservative habitable zone — the most promising region for habitability. Whether it is actually habitable depends on its atmosphere and composition, which remain unknown.
How far away is BEBOP-3 b?
BEBOP-3 b is about 388 light-years from Earth in the constellation Camelopardalis. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,834,080 years to get there.
How long is a year on BEBOP-3 b?
One orbit around BEBOP-3 takes 547.0 Earth days.
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