Exoplanet · Neptune-like planet
Kepler-20 g
Kepler-20 g is a Neptune-like planet orbiting the star Kepler-20. Its year lasts 34.9 Earth days. It was discovered in 2016 by the Radial Velocity method.
| Host star | Kepler-20 |
|---|---|
| Distance | 921.6 light-years (282.6 pc) |
| Orbital period | 34.9 days |
| Orbital radius | 0.206 AU |
| Eccentricity | 0.150 |
| Radius | 4.71 R⊕ · 0.42 R♃ |
| Mass (minimum) | 20 M⊕ · 0.0628 M♃ |
| Density | 1.05 g/cm³ |
| Equilibrium temperature | 524 K (251 °C) |
| Stellar flux received | 16.2 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2016 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 16.2 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 2.5° across: 4.7 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.61. Visible from the whole Northern Hemisphere and south to latitude 48° S. North of latitude 48° N it never sets. It stands highest at midnight in July, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1104. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
Planets in the same system
- Kepler-20 b 3.7-day orbit · 1.77 R⊕
- Kepler-20 e 6.1-day orbit · 0.821 R⊕
- Kepler-20 c 10.9-day orbit · 2.89 R⊕
- Kepler-20 f 19.6-day orbit · 0.952 R⊕
- Kepler-20 d 77.6-day orbit · 2.61 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.