HD 5278 is 188 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this F V star; the first was found in 2021 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DHD 5278 b goes round its star every 14.3 days, 6 times as often as Mercury goes round the Sun.
| Spectral type | F V |
| Surface temperature | 6,203 K |
| Mass | 1.126 solar masses |
| Radius | 1.194 solar radii |
| Luminosity | 1.907 times the Sun |
| Apparent magnitude | 7.94 |
| Age | about 3 billion years |
| Distance from the Sun | 187.8 light-years (57.6 parsecs) |
| Position (J2000) | RA 12.5468°, Dec -83.7438° |
| Constellation | Octans |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 5278 b | 14.3 days | 0.120 AU | 2.45 R⊕ | 7.8 M⊕ | Transit, 2021 |
| HD 5278 c | 40.9 days | 0.242 AU | 4.49 R⊕ estimated | 18.4 M⊕ minimum | Radial Velocity, 2021 |
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 6,203 K, 1.9 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.28 to 2.23 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 188 years ago, around 1840.