Exoplanet · mini-Neptune
LSPM J2116+0234 b
LSPM J2116+0234 b is a mini-Neptune orbiting the star LSPM J2116+0234. Its year lasts 14.4 Earth days. It was discovered in 2019 by the Radial Velocity method.
| Host star | LSPM J2116+0234 |
|---|---|
| Distance | 57.5 light-years (17.6 pc) |
| Orbital period | 14.4 days |
| Orbital radius | 0.0876 AU |
| Eccentricity | 0.183 |
| Radius | 3.71 R⊕ · 0.331 R♃ |
| Mass (minimum) | 13.3 M⊕ · 0.0418 M♃ |
| Density | 1.43 g/cm³ |
| Equilibrium temperature | 372 K (99 °C) |
| Stellar flux received | 2.61 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2019 |
| Discovered by | Calar Alto Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 2.61 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 11.96. Visible from the whole Northern Hemisphere and south to latitude 87° S. It stands highest at midnight in August, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1968. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.