HD 118203 is 301 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K0 IV star; the first was found in 2005 by radial velocity (Haute-Provence Observatory).
Fly there in 3DHD 118203 b goes round its star every 6.13 days, 14 times as often as Mercury goes round the Sun.
| Spectral type | K0 IV |
| Surface temperature | 5,742 K |
| Mass | 1.27 solar masses |
| Radius | 2.04 solar radii |
| Luminosity | 4.424 times the Sun |
| Apparent magnitude | 8.05 |
| Age | about 4.73 billion years |
| Distance from the Sun | 300.9 light-years (92.3 parsecs) |
| Position (J2000) | RA 203.5100°, Dec 53.7282° |
| Constellation | Ursa Major |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 118203 b | 6.13 days | 0.0713 AU | 12.778 R⊕ | 680.15 M⊕ | Radial Velocity, 2005 |
| HD 118203 c | 14.0 years | 6.280 AU | 12.4 R⊕ estimated | 3747.2 M⊕ | Radial Velocity, 2024 |
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 5,742 K, 4.4 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.00 to 3.54 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 301 years ago, around 1730.