HD 27442 is 59.6 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K1/2III star; the first was found in 2000 by radial velocity (Anglo-Australian Telescope).
Fly there in 3DHD 27442 b takes 428.1 days to go round its star once.
HD 27442 is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.
| Spectral type | K1/2III |
| Surface temperature | 4,846 K |
| Mass | 1.23 solar masses |
| Radius | 3.18 solar radii |
| Luminosity | 7.094 times the Sun |
| Apparent magnitude | 4.44 |
| Age | about 10 billion years |
| Distance from the Sun | 59.6 light-years (18.3 parsecs) |
| Position (J2000) | RA 64.1205°, Dec -59.3029° |
| Constellation | Reticulum |
HD 27442 B is a DA3 star of magnitude 12.5, judged a true companion. In 2015 it was 13″ from HD 27442, at position angle 37° (Washington Double Star Catalog, 04165-5918 JSP 56): 238 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 27442 b | 428.1 days | 1.271 AU | 13.5 R⊕ estimated | 495.8 M⊕ minimum | Radial Velocity, 2000 |
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 4,846 K, 7.1 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.66 to 4.85 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 60 years ago, within living memory.