Kepler-444 is 119 light-years from the Sun. The NASA Exoplanet Archive lists 5 planets around this K star; the first was found in 2015 by transit (Kepler).
Fly there in 3DKepler-444 b goes round its star every 3.60 days, 24 times as often as Mercury goes round the Sun.
Kepler-444 is one of 3 stars in its system: the others are drawn where the Washington Double Star Catalog measures them on the sky.
| Spectral type | K |
| Surface temperature | 5,046 K |
| Mass | 0.758 solar masses |
| Radius | 0.752 solar radii |
| Luminosity | 0.3762 times the Sun |
| Apparent magnitude | 8.87 |
| Age | about 11.23 billion years |
| Distance from the Sun | 118.8 light-years (36.4 parsecs) |
| Position (J2000) | RA 289.7528°, Dec 41.6319° |
| Constellation | Lyra |
Kepler-444 BC, a close pair seen as one, is a K8 star of magnitude 16.9, with a computed orbit. In 2015 it was 1.8″ from Kepler-444, at position angle 253° (Washington Double Star Catalog, 19190+4138 KOI3158 A,BC): 65.6 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-444 b | 3.60 days | 0.0418 AU | 0.403 R⊕ | 0.0374 M⊕ estimated | Transit, 2015 |
| Kepler-444 c | 4.55 days | 0.0488 AU | 0.497 R⊕ | 0.0793 M⊕ estimated | Transit, 2015 |
| Kepler-444 d | 6.19 days | 0.0600 AU | 0.53 R⊕ | 0.2 M⊕ | Transit, 2015 |
| Kepler-444 e | 7.74 days | 0.0696 AU | 0.546 R⊕ | 0.1 M⊕ | Transit, 2015 |
| Kepler-444 f | 9.74 days | 0.0811 AU | 0.741 R⊕ | 0.332 M⊕ estimated | Transit, 2015 |
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 5,046 K, 0.38 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.61 to 1.10 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 119 years ago, around 1910.