GJ 143 is 53.2 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K4.5 star; the first was found in 2019 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DHD 21749 c goes round its star every 7.79 days, 11 times as often as Mercury goes round the Sun.
| Spectral type | K4.5 |
| Surface temperature | 4,640 K |
| Mass | 0.73 solar masses |
| Radius | 0.695 solar radii |
| Luminosity | 0.206 times the Sun |
| Apparent magnitude | 8.08 |
| Age | about 3.8 billion years |
| Distance from the Sun | 53.2 light-years (16.3 parsecs) |
| Position (J2000) | RA 51.7502°, Dec -63.5002° |
| Constellation | Reticulum |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 21749 c | 7.79 days | 0.0695 AU | 0.892 R⊕ | 3.7 M⊕ | Transit, 2019 |
| GJ 143 b | 35.6 days | 0.192 AU | 2.61 R⊕ | 22.7 M⊕ | Transit, 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.
For a star of 4,640 K, 0.21 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.46 to 0.84 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 53 years ago, within living memory.