HD 278555 is 945 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F8 star; the first was found in 2026 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DHD 278555 b goes round its star every 28.8 days, 3 times as often as Mercury goes round the Sun.
| Spectral type | F8 |
| Surface temperature | 6,047 K |
| Mass | 1.255 solar masses |
| Radius | 1.624 solar radii |
| Luminosity | 3.13 times the Sun |
| Apparent magnitude | 11.046 |
| Age | about 3.8 billion years |
| Distance from the Sun | 945.3 light-years (289.8 parsecs) |
| Position (J2000) | RA 50.3680°, Dec 32.9138° |
| Constellation | Perseus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 278555 b | 28.8 days | 0.199 AU | 11.03 R⊕ | 266.98 M⊕ | Transit, 2026 |
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.