Exoplanet · super-Earth
GJ 3988 b
GJ 3988 b is a super-Earth orbiting the star GJ 3988. Its year lasts 6.94 Earth days. It was discovered in 2023 by the Radial Velocity method.
| Host star | GJ 3988 |
|---|---|
| Distance | 32.3 light-years (9.91 pc) |
| Orbital period | 6.94 days |
| Orbital radius | 0.0405 AU |
| Eccentricity | 0.000 |
| Radius | 1.74 R⊕ · 0.155 R♃ |
| Mass (minimum) | 3.69 M⊕ · 0.0116 M♃ |
| Density | 3.85 g/cm³ |
| Equilibrium temperature | 348 K (75 °C) |
| Stellar flux received | 2.45 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2023 |
| Discovered by | Calar Alto Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 2.45 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 2.6° across: 4.9 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 13.56. Visible from the whole Northern Hemisphere and south to latitude 39° S. North of latitude 39° 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 1994. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 573 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.