HD 128356 is 85.3 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K3 V star; the first was found in 2016 by radial velocity (Multiple Observatories).
Fly there in 3DHD 128356 b takes 298.2 days to go round its star once.
| Spectral type | K3 V |
| Surface temperature | 4,875 K |
| Mass | 0.65 solar masses |
| Radius | 0.85 solar radii |
| Luminosity | 0.36 times the Sun |
| Apparent magnitude | 8.2411 |
| Age | about 10 billion years |
| Distance from the Sun | 85.3 light-years (26.2 parsecs) |
| Position (J2000) | RA 219.2703°, Dec -25.8032° |
| Constellation | Hydra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 128356 b | 298.2 days | 0.870 AU | 13.9 R⊕ estimated | 282.87 M⊕ minimum | Radial Velocity, 2016 |
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 4,875 K, 0.36 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.60 to 1.09 AU. Its one known planet 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 85 years ago, within living memory.