HD 16417 is 82.8 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G1 V star; the first was found in 2008 by radial velocity (Anglo-Australian Telescope).
Fly there in 3DHD 16417 b goes round its star every 17.2 days, 5 times as often as Mercury goes round the Sun.
HD 16417 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 | G1 V |
| Surface temperature | 5,841 K |
| Mass | 1.2 solar masses |
| Radius | 1.63998 solar radii |
| Luminosity | 2.774 times the Sun |
| Apparent magnitude | 5.78 |
| Age | about 7 billion years |
| Distance from the Sun | 82.8 light-years (25.4 parsecs) |
| Position (J2000) | RA 39.2441°, Dec -34.5791° |
| Constellation | Fornax |
HD 16417 B is a M5/6 star of magnitude 13, judged a true companion. In 2016 it was 45″ from HD 16417, at position angle 79° (Washington Double Star Catalog, 02370-3435 MUG 12): 1,143 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 16417 b | 17.2 days | 0.140 AU | 5 R⊕ estimated | 22.1 M⊕ minimum | Radial Velocity, 2008 |
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 5,841 K, 2.8 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.58 to 2.78 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 83 years ago, within living memory.