HIP 41378 is 347 light-years from the Sun. The NASA Exoplanet Archive lists 6 planets around this F6 star; the first was found in 2016 by transit (K2).
Fly there in 3DHIP 41378 b goes round its star every 15.6 days, 6 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Spectral type | F6 |
| Surface temperature | 6,290 K |
| Mass | 1.22 solar masses |
| Radius | 1.3 solar radii |
| Luminosity | 2.491 times the Sun |
| Apparent magnitude | 8.93 |
| Age | about 2.07 billion years |
| Distance from the Sun | 346.7 light-years (106.3 parsecs) |
| Position (J2000) | RA 126.6158°, Dec 10.0804° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HIP 41378 g | 63.2 days | 0.332 AU from Kepler’s law | 2.5 R⊕ estimated | 6.81 M⊕ | Radial Velocity, 2025 |
| HIP 41378 b | 15.6 days | 0.130 AU | 2.64 R⊕ | 6.9 M⊕ | Transit, 2016 |
| HIP 41378 c | 31.7 days | 0.209 AU | 2.74 R⊕ | 5.97 M⊕ | Transit, 2016 |
| HIP 41378 e | 393.0 days | 0.680 AU | 5.19 R⊕ | 7.62 M⊕ | Transit, 2016 |
| HIP 41378 d | 278.4 days | 1.170 AU | 3.65 R⊕ | 6.53 M⊕ | Transit, 2016 |
| HIP 41378 f | 542.1 days | 1.394 AU | 9.47 R⊕ | 25 M⊕ | Transit, 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 6,290 K, 2.5 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.45 to 2.54 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 347 years ago, around 1680.