Kepler-390 is 1,420 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,166 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-390 b goes round its star every 6.74 days, 13 times as often as Mercury goes round the Sun.
Kepler-390 is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.
| Surface temperature | 5,166 K |
| Mass | 0.787 solar masses |
| Radius | 0.776 solar radii |
| Luminosity | 0.4446 times the Sun |
| Apparent magnitude | 14.231 |
| Age | about 3.24 billion years |
| Distance from the Sun | 1419.7 light-years (435.3 parsecs) |
| Position (J2000) | RA 291.6288°, Dec 41.2088° |
| Constellation | Lyra |
Kepler-390 B has no spectral type listed of magnitude 12.6, judged a true companion. In 2016 it was 20.7″ from Kepler-390, at position angle 24° (Washington Double Star Catalog, 19265+4112 DEA 412): 9,010 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-390 b | 6.74 days | 0.0650 AU | 0.82 R⊕ | 0.477 M⊕ estimated | Transit, 2014 |
| Kepler-390 c | 13.1 days | 0.101 AU | 0.79 R⊕ | 0.418 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 5,166 K, 0.44 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.66 to 1.18 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 1,420 years ago, around AD 610.