HD 18143 is 73.5 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K2 star; the first was found in 2022 by radial velocity (Multiple Observatories).
Fly there in 3DHD 18143 b goes round its star every 10.3 days, 9 times as often as Mercury goes round the Sun.
| Spectral type | K2 |
| Surface temperature | 5,078 K |
| Mass | 0.85 solar masses |
| Radius | 0.87 solar radii |
| Luminosity | 0.4791 times the Sun |
| Apparent magnitude | 7.518 |
| Age | about 9.4 billion years |
| Distance from the Sun | 73.5 light-years (22.5 parsecs) |
| Position (J2000) | RA 43.9140°, Dec 26.8724° |
| Constellation | Aries |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 18143 b | 10.3 days | 0.0880 AU | 3.28 R⊕ estimated | 10.806 M⊕ minimum | Radial Velocity, 2022 |
| HD 18143 c | 79.3 years | 17.530 AU | 12.5 R⊕ estimated | 3177.6 M⊕ | Radial Velocity, 2022 |
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.