Gl 410 b
Gl 410 b is a super-Earth orbiting Gl 410 in the constellation Leo. It lies about 39 light-years from Earth and was discovered in 2025 using the radial velocity method.
Is Gl 410 b in the Habitable Zone?
Gl 410 b orbits inside the inner edge of the habitable zone of Gl 410. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of Gl 410: 0.195–0.499 AU (conservative: 0.248–0.473 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on Gl 410 b — one full orbit around Gl 410 — lasts 6.02 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.053 AU — closer to its star than Mercury is to the Sun.
How Was Gl 410 b Discovered?
Gl 410 b was discovered in 2025 using the radial velocity method, with observations from Mauna Kea 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 Gl 410 b?
Gl 410 b is 38.9 light-years (11.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1988. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 684,640 years to make the journey.
The Host Star: Gl 410
Gl 410
- Surface temperature
- 3,842 K (Sun: 5,772 K)
- Mass
- 0.55 M☉
- Radius
- 0.54 R☉
- Luminosity
- 0.0577 L☉
- Age
- 0.5 billion years (Sun: 4.6)
Planetary System
Gl 410 b is the only planet known to orbit Gl 410 so far.
Gl 410 b — Complete Data
| Mass (best estimate) | 8.40 Earth masses |
|---|---|
| Orbital period | 6.02 days |
| Orbital distance | 0.053 AU |
| Distance from Earth | 38.9 light-years (11.9 parsecs) |
| Constellation | Leo |
| Discovery method | Radial Velocity |
| Discovery facility | Mauna Kea Observatory |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-04-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Gl 410 b
Is Gl 410 b habitable?
No — Gl 410 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is Gl 410 b?
Gl 410 b is about 39 light-years from Earth in the constellation Leo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 684,640 years to get there.
How long is a year on Gl 410 b?
One orbit around Gl 410 takes 6.0 Earth days — short enough that 61 of its years would fit into one Earth year.
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