Exoplanet · super-Earth
Gl 725 B c
Gl 725 B c is a super-Earth orbiting the star Struve 2398 B. Its year lasts 37.9 Earth days. It was discovered in 2026 by the Radial Velocity method.
| Host star | Struve 2398 B |
|---|---|
| Distance | 22.3 light-years (6.84 pc) |
| Orbital period | 37.9 days |
| Orbital radius | 0.139 AU |
| Radius | 1.66 R⊕ · 0.148 R♃ |
| Mass (minimum) | 3.4 M⊕ · 0.0107 M♃ |
| Density | 4.08 g/cm³ |
| Equilibrium temperature | 215 K (-58 °C) |
| Stellar flux received | 0.474 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2026 |
| Discovered by | Mauna Kea Observatory |
Habitable zone
Inside its star's habitable zone: it receives enough light for liquid water to exist on its surface under a suitable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 1.1° across: 2 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.70. 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 2004. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 396 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.