HD 181433 is 87.7 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this K3 IV star; the first was found in 2008 by radial velocity (La Silla Observatory).
Fly there in 3DHD 181433 b goes round its star every 9.37 days, 9 times as often as Mercury goes round the Sun.
| Spectral type | K3 IV |
| Surface temperature | 4,918 K |
| Mass | 0.86 solar masses |
| Radius | 0.79 solar radii |
| Luminosity | 0.3498 times the Sun |
| Apparent magnitude | 8.4 |
| Age | about 6.7 billion years |
| Distance from the Sun | 87.7 light-years (26.9 parsecs) |
| Position (J2000) | RA 291.2874°, Dec -66.4678° |
| Constellation | Pavo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 181433 b | 9.37 days | 0.0828 AU | — | 1708.6 M⊕ | Radial Velocity, 2008 |
| HD 181433 c | 2.8 years | 1.885 AU | — | 2207 M⊕ | Radial Velocity, 2008 |
| HD 181433 d | 18.9 years | 6.740 AU | 13.2 R⊕ estimated | 858.14 M⊕ | 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 4,918 K, 0.35 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.59 to 1.07 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 88 years ago, within living memory.