Exoplanet · super-Earth
Gl 725 A b
Gl 725 A b is a super-Earth orbiting the star Struve 2398 A. Its year lasts 11.2 Earth days. It was discovered in 2025 by the Radial Velocity method.
| Host star | Struve 2398 A |
|---|---|
| Distance | 11.5 light-years (3.52 pc) |
| Orbital period | 11.2 days |
| Orbital radius | 0.068 AU |
| Eccentricity | 0.000 |
| Radius | 1.48 R⊕ · 0.132 R♃ |
| Mass (minimum) | 2.78 M⊕ · 0.00875 M♃ |
| Density | 4.71 g/cm³ |
| Equilibrium temperature | 376 K (103 °C) |
| Stellar flux received | 3.36 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2025 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 3.36 times the light the Earth does, too hot to keep liquid water on its surface.
Its star in the sky
In the planet's sky its star is a disc 2.8° across: 5.2 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.94); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 30° S. North of latitude 30° N it never sets. It stands highest at midnight in June, the best time to observe it.
Light's journey
The light you see tonight set out around the year 2015. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 204 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.