Kepler-104 is 1,307 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,711 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-104 b goes round its star every 11.4 days, 8 times as often as Mercury goes round the Sun.
Kepler-104 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 | 5,711 K |
| Mass | 0.818 solar masses |
| Radius | 1.349 solar radii |
| Luminosity | 1.228 times the Sun |
| Apparent magnitude | 12.697 |
| Age | about 13.18 billion years |
| Distance from the Sun | 1307.2 light-years (400.8 parsecs) |
| Position (J2000) | RA 287.6047°, Dec 42.1665° |
| Constellation | Lyra |
Kepler-104 C has no spectral type listed of magnitude 14.1, judged a true companion. In 2016 it was 17″ from Kepler-104, at position angle 308° (Washington Double Star Catalog, 19104+4210 DEA 364 AC): 6,813 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-104 b | 11.4 days | 0.0940 AU | 3.1 R⊕ | 19.6 M⊕ | Transit, 2014 |
| Kepler-104 c | 23.7 days | 0.153 AU | 3.13 R⊕ | 7.1443 M⊕ minimum | Transit, 2014 |
| Kepler-104 d | 51.8 days | 0.257 AU | 3.58 R⊕ | 5.5402 M⊕ minimum | 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 5,711 K, 1.2 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.06 to 1.87 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 1,307 years ago, around AD 720.