HD 50554 is 102 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this F8 V star; the first was found in 2002 by radial velocity (Lick Observatory).
Fly there in 3DHD 50554 c goes round its star every 5.97 days, 15 times as often as Mercury goes round the Sun.
| Spectral type | F8 V |
| Surface temperature | 6,050 K |
| Mass | 1.1 solar masses |
| Radius | 1.02 solar radii |
| Luminosity | 1.498 times the Sun |
| Apparent magnitude | 6.8561 |
| Age | about 2.16 billion years |
| Distance from the Sun | 101.7 light-years (31.2 parsecs) |
| Position (J2000) | RA 103.6783°, Dec 24.2451° |
| Constellation | Gemini |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 50554 c | 5.97 days | 0.0652 AU | 1.31 R⊕ | 5.3 M⊕ | Transit, 2026 |
| HD 50554 d | 28.1 days | 0.183 AU | 1.41 R⊕ | 10.4 M⊕ | Transit, 2026 |
| HD 50554 b | 3.4 years | 2.339 AU | 12.8 R⊕ estimated | 1859.3 M⊕ | Radial Velocity, 2002 |
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 6,050 K, 1.5 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.14 to 2.00 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 102 years ago, around 1920.