HD 39091 is 59.6 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this G0 V star; the first was found in 2001 by radial velocity (Anglo-Australian Telescope).
Fly there in 3Dpi Men c goes round its star every 6.27 days, 14 times as often as Mercury goes round the Sun.
| Spectral type | G0 V |
| Surface temperature | 5,998 K |
| Mass | 1.07 solar masses |
| Radius | 1.17 solar radii |
| Luminosity | 1.444 times the Sun |
| Apparent magnitude | 5.65 |
| Age | about 3.92 billion years |
| Distance from the Sun | 59.6 light-years (18.3 parsecs) |
| Position (J2000) | RA 84.2993°, Dec -80.4646° |
| Constellation | Mensa |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| pi Men c | 6.27 days | 0.0684 AU | 2.0189 R⊕ | 3.63 M⊕ | Transit, 2018 |
| pi Men d | 124.6 days | 0.506 AU | 3.72 R⊕ estimated | 13.38 M⊕ minimum | Radial Velocity, 2022 |
| HD 39091 b | 5.7 years | 3.280 AU | 12.3 R⊕ estimated | 4481.4 M⊕ | Radial Velocity, 2001 |
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 5,998 K, 1.4 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.13 to 1.98 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.