Kepler-1398 is 2,780 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 6,126 K star; the first was found in 2016 by transit (Kepler).
Fly there in 3DKepler-1398 b goes round its star every 2.79 days, 32 times as often as Mercury goes round the Sun.
| Surface temperature | 6,126 K |
| Mass | 1.13 solar masses |
| Radius | 1.18 solar radii |
| Luminosity | 2.052 times the Sun |
| Apparent magnitude | 13.752 |
| Age | about 3.09 billion years |
| Distance from the Sun | 2779.5 light-years (852.2 parsecs) |
| Position (J2000) | RA 294.8661°, Dec 48.6390° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-1398 b | 2.79 days | 0.0391 AU | 0.9 R⊕ | 0.666 M⊕ estimated | Transit, 2016 |
| Kepler-1398 c | 4.14 days | 0.0509 AU | 1.03 R⊕ | 1.08 M⊕ estimated | Transit, 2016 |
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 6,126 K, 2.1 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.33 to 2.33 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 2,780 years ago, around 800 BC.