Exoplanet · Neptune-like planet
Kepler-561 b
Kepler-561 b is a Neptune-like planet orbiting the star Kepler-561. Its year lasts 58.4 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 | 58.4 days |
| Orbital radius | 0.293 AU |
| Eccentricity | 0.000 |
| Radius | 6.96 R⊕ · 0.621 R♃ |
| Mass | 38.7 M⊕ · 0.122 M♃ (estimated from the radius) |
| Density | 0.631 g/cm³ |
| Equilibrium temperature | 446 K (173 °C) |
| Stellar flux received | 7.57 × Earth |
| Discovery method | Transit |
| Discovery year | 2016 |
| Discovered by | Kepler |
Habitable zone
Inside the inner edge of the habitable zone: it receives 7.57 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 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 c 5.35-day orbit · 2.68 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.