HD 12235 is 104 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,986 K star; the first was found in 2022 by radial velocity (Multiple Observatories).
Fly there in 3DHD 12235 b goes round its star every 4.36 days, 20 times as often as Mercury goes round the Sun.
| Surface temperature | 5,986 K |
| Mass | 1.1 solar masses |
| Radius | 1.80185 solar radii |
| Luminosity | 3.756 times the Sun |
| Apparent magnitude | 5.88051 |
| Distance from the Sun | 103.6 light-years (31.8 parsecs) |
| Position (J2000) | RA 30.0392°, Dec 3.0959° |
| Constellation | Pisces |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 12235 b | 4.36 days | 0.0540 AU | 3.23 R⊕ estimated | 10.488 M⊕ minimum | Radial Velocity, 2022 |
| HD 12235 c | 99.5 years | 22.210 AU | 12.5 R⊕ estimated | 3135.7 M⊕ | 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 5,986 K, 3.8 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.82 to 3.19 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 104 years ago, around 1920.