HD 199509 is 79.3 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G3V star; the first was found in 2022 by radial velocity (Multiple Observatories).
Fly there in 3DHD 199509 b takes 99.6 days to go round its star once.
| Spectral type | G3V |
| Surface temperature | 5,796 K |
| Mass | 1.04 solar masses |
| Radius | 0.92 solar radii |
| Luminosity | 0.8238 times the Sun |
| Apparent magnitude | 6.98 |
| Age | about 1.6 billion years |
| Distance from the Sun | 79.3 light-years (24.3 parsecs) |
| Position (J2000) | RA 317.3446°, Dec -82.0275° |
| Constellation | Octans |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 199509 b | 99.6 days | 0.426 AU | 7.43 R⊕ estimated | 43.225 M⊕ minimum | Radial Velocity, 2022 |
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 5,796 K, 0.82 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.86 to 1.52 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 79 years ago, within living memory.