KOI-12 is 1,303 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 6,635 K star; the first was found in 2015 by transit (Kepler).
Fly there in 3DKOI-12 b goes round its star every 17.9 days, 5 times as often as Mercury goes round the Sun.
| Surface temperature | 6,635 K |
| Mass | 1.5 solar masses |
| Radius | 1.4 solar radii |
| Luminosity | 4.231 times the Sun |
| Apparent magnitude | 11.51 |
| Age | about 1.45 billion years |
| Distance from the Sun | 1302.7 light-years (399.4 parsecs) |
| Position (J2000) | RA 297.4537°, Dec 41.0110° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| KOI-12 b | 17.9 days | 0.154 AU | 13.787 R⊕ | 349.61 M⊕ | Transit, 2015 |
| Kepler-448 c | 6.8 years | 4.200 AU | 12 R⊕ estimated | 6992.3 M⊕ | Transit Timing Variations, 2017 |
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 6,635 K, 4.2 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.86 to 3.22 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 1,303 years ago, around AD 720.