Exoplanet · super-Earth
K2-3 d
K2-3 d is a super-Earth orbiting the star K2-3. Its year lasts 44.6 Earth days. It was discovered in 2015 by the Transit method.
| Host star | K2-3 |
|---|---|
| Distance | 143.7 light-years (44.1 pc) |
| Orbital period | 44.6 days |
| Orbital radius | 0.201 AU |
| Eccentricity | 0.091 |
| Radius | 1.46 R⊕ · 0.13 R♃ |
| Mass | 2.2 M⊕ · 0.00692 M♃ |
| Density | 17.5 g/cm³ |
| Surface gravity | 1.03 × Earth |
| Equilibrium temperature | 305 K (32 °C) |
| Stellar flux received | 1.44 × Earth |
| Discovery method | Transit |
| Discovery year | 2015 |
| Discovered by | K2 |
Habitable zone
At the edge of the habitable zone (within the optimistic limits): liquid water would be possible only with a favourable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 1.4° across: 2.7 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.12. Visible from the whole Southern Hemisphere and north to latitude 89° N. 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 1882. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
Planets in the same system
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.