Exoplanet · gas giant
Kepler-539 c
Kepler-539 c is a gas giant orbiting the star Kepler-539. Its year lasts 1,000 Earth days. It was discovered in 2016 by the Transit Timing Variations method.
| Host star | Kepler-539 |
|---|---|
| Distance | 1,002 light-years (307.3 pc) |
| Orbital period | 2.74 years |
| Orbital radius | 2.42 AU |
| Eccentricity | 0.500 |
| Radius | 13.3 R⊕ · 1.19 R♃ |
| Mass | 763 M⊕ · 2.4 M♃ |
| Density | 1.78 g/cm³ |
| Surface gravity | 4.31 × Earth |
| Equilibrium temperature | 253 K (-20 °C) |
| Stellar flux received | 0.149 × Earth |
| Discovery method | Transit Timing Variations |
| Discovery year | 2016 |
| Discovered by | Kepler |
Habitable zone
Beyond the habitable zone: it receives only %15 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.21° across: 0.39 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.44. 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 1024. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 18 million years.
Planets in the same system
- Kepler-539 b 126-day orbit · 8.37 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.