HD 20003 is 136 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G8 V star; the first was found in 2019 by radial velocity (La Silla Observatory).
Fly there in 3DHD 20003 b goes round its star every 11.8 days, 7 times as often as Mercury goes round the Sun.
| Spectral type | G8 V |
| Surface temperature | 5,494 K |
| Mass | 0.875 solar masses |
| Radius | 0.921637 solar radii |
| Luminosity | 0.72 times the Sun |
| Apparent magnitude | 8.39 |
| Distance from the Sun | 136.4 light-years (41.8 parsecs) |
| Position (J2000) | RA 46.9090°, Dec -72.3219° |
| Constellation | Hydrus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 20003 b | 11.8 days | 0.0974 AU | 3.43 R⊕ estimated | 11.66 M⊕ minimum | Radial Velocity, 2019 |
| HD 20003 c | 33.9 days | 0.196 AU | 3.89 R⊕ estimated | 14.44 M⊕ minimum | Radial Velocity, 2019 |
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.