GJ 328 is 66.9 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M0.0 star; the first was found in 2013 by radial velocity (McDonald Observatory).
Fly there in 3DGJ 328 b takes 10.3 years to go round its star once.
| Spectral type | M0.0 |
| Surface temperature | 3,897 K |
| Mass | 0.65 solar masses |
| Radius | 0.63 solar radii |
| Luminosity | 0.08318 times the Sun |
| Apparent magnitude | 9.99 |
| Distance from the Sun | 66.9 light-years (20.5 parsecs) |
| Position (J2000) | RA 133.7820°, Dec 1.5420° |
| Constellation | Hydra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 328 c | 241.8 days | 0.657 AU | 4.91 R⊕ estimated | 21.4 M⊕ minimum | Radial Velocity, 2023 |
| GJ 328 b | 10.3 years | 4.110 AU | 13.3 R⊕ estimated | 797.75 M⊕ minimum | Radial Velocity, 2013 |
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 3,897 K, 0.083 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.30 to 0.57 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 67 years ago, within living memory.