Kepler-139 is 1,275 light-years from the Sun. The NASA Exoplanet Archive lists 5 planets around this 5,594 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-139 d goes round its star every 7.31 days, 12 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 5,594 K |
| Mass | 1.078 solar masses |
| Radius | 1.3 solar radii |
| Luminosity | 1.037 times the Sun |
| Apparent magnitude | 12.775 |
| Age | about 5.1 billion years |
| Distance from the Sun | 1275.4 light-years (391.0 parsecs) |
| Position (J2000) | RA 282.3919°, Dec 43.8894° |
| Constellation | Lyra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-139 d | 7.31 days | 0.0756 AU | 1.695 R⊕ | 2 M⊕ | Transit, 2023 |
| Kepler-139 b | 15.8 days | 0.127 AU | 2.94 R⊕ | 7 M⊕ | Transit, 2014 |
| Kepler-139 f | 355.0 days | 1.006 AU from Kepler’s law | 6.67 R⊕ estimated | 36 M⊕ | Transit Timing Variations, 2025 |
| Kepler-139 c | 157.1 days | 0.586 AU | 3.38 R⊕ | 13 M⊕ | Transit, 2014 |
| Kepler-139 e | 5.6 years | 3.236 AU | 13.7 R⊕ estimated | 378 M⊕ | Radial Velocity, 2023 |
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 5,594 K, 1.0 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.98 to 1.73 AU. 1 of its 5 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 1,275 years ago, around AD 750.