Exoplanet · mini-Neptune
Kepler-561 c
Kepler-561 c is a mini-Neptune orbiting the star Kepler-561. Its year lasts 5.35 Earth days. It was discovered in 2016 by the Transit method.
| Host star | Kepler-561 |
|---|---|
| Distance | 2,027 light-years (621.4 pc) |
| Orbital period | 5.35 days |
| Orbital radius | 0.0595 AU |
| Eccentricity | 0.000 |
| Radius | 2.68 R⊕ · 0.239 R♃ |
| Mass | 7.65 M⊕ · 0.0241 M♃ (estimated from the radius) |
| Density | 2.18 g/cm³ |
| Equilibrium temperature | 989 K (716 °C) |
| Stellar flux received | 183 × Earth |
| Discovery method | Transit |
| Discovery year | 2016 |
| Discovered by | Kepler |
Habitable zone
Inside the inner edge of the habitable zone: it receives 183 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 8.4° across: 16 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 14.43. Visible from the whole Northern Hemisphere and south to latitude 45° S. North of latitude 45° 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 2 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 36 million years.
Planets in the same system
- Kepler-561 b 58.4-day orbit · 6.96 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.