Exoplanet · mini-Neptune
GJ 1151 c
GJ 1151 c is a mini-Neptune orbiting the star GJ 1151. Its year lasts 390 Earth days. It was discovered in 2023 by the Radial Velocity method.
| Host star | GJ 1151 |
|---|---|
| Distance | 26.2 light-years (8.04 pc) |
| Orbital period | 390 days |
| Orbital radius | 0.571 AU |
| Radius | 3.25 R⊕ · 0.29 R♃ |
| Mass (minimum) | 10.6 M⊕ · 0.0334 M♃ |
| Density | 1.7 g/cm³ |
| Equilibrium temperature | 88 K (-185 °C) |
| Stellar flux received | 0.0102 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2023 |
| Discovered by | Multiple Facilities |
Habitable zone
Beyond the habitable zone: it receives only %1 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.17° across: 0.31 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 13.25. Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° N it never sets. It stands highest at midnight in March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 2000. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 465 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.