Kepler-308 is 4,357 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,895 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-308 b goes round its star every 9.69 days, 9 times as often as Mercury goes round the Sun.
| Surface temperature | 5,895 K |
| Mass | 0.92 solar masses |
| Radius | 0.941 solar radii |
| Luminosity | 0.7662 times the Sun |
| Apparent magnitude | 16.019 |
| Age | about 0.5 billion years |
| Distance from the Sun | 4357.2 light-years (1335.9 parsecs) |
| Position (J2000) | RA 295.7852°, Dec 40.4396° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-308 b | 9.69 days | 0.0900 AU | 2.12 R⊕ | 5.14 M⊕ estimated | Transit, 2014 |
| Kepler-308 c | 15.4 days | 0.123 AU | 2.16 R⊕ | 5.31 M⊕ estimated | 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 5,895 K, 0.77 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.83 to 1.45 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 4,357 years ago, around 2300 BC.