Kepler-240 is 2,436 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 4,985 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-240 b goes round its star every 4.14 days, 21 times as often as Mercury goes round the Sun.
| Surface temperature | 4,985 K |
| Mass | 0.868 solar masses |
| Radius | 0.739 solar radii |
| Luminosity | 0.2995 times the Sun |
| Apparent magnitude | 15.953 |
| Age | about 1.91 billion years |
| Distance from the Sun | 2436.2 light-years (746.9 parsecs) |
| Position (J2000) | RA 291.1588°, Dec 40.7502° |
| Constellation | Lyra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-240 b | 4.14 days | 0.0480 AU | 1.37 R⊕ | 2.45 M⊕ estimated | Transit, 2014 |
| Kepler-240 c | 7.95 days | 0.0740 AU | 2.2 R⊕ | 102.3 M⊕ | Transit, 2014 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.
For a star of 4,985 K, 0.30 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.54 to 0.98 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 2,436 years ago, around 400 BC.