Exoplanet · gas giant
Kepler-25 d
Kepler-25 d is a gas giant orbiting the star Kepler-25. Its year lasts 122 Earth days. It was discovered in 2014 by the Radial Velocity method.
| Host star | Kepler-25 |
|---|---|
| Distance | 793.4 light-years (243.2 pc) |
| Orbital period | 122 days |
| Orbital radius | 0.416 AU |
| Eccentricity | 0.130 |
| Radius | 10 R⊕ · 0.892 R♃ |
| Mass | 71.9 M⊕ · 0.226 M♃ |
| Density | 0.395 g/cm³ |
| Surface gravity | 0.719 × Earth |
| Equilibrium temperature | 545 K (272 °C) |
| Stellar flux received | 15.2 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2014 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 15.2 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 1.7° across: 3.2 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.83. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° 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 1233. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
Planets in the same system
- Kepler-25 b 6.24-day orbit · 2.75 R⊕
- Kepler-25 c 12.7-day orbit · 5.22 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.