TOI-3856 is 1,026 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 5,622 K star; the first was found in 2025 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-3856 b goes round its star every 2.04 days, 43 times as often as Mercury goes round the Sun.
| Surface temperature | 5,622 K |
| Mass | 1.096 solar masses |
| Radius | 1.055 solar radii |
| Luminosity | 1.002 times the Sun |
| Apparent magnitude | 12.292 |
| Age | about 2.6 billion years |
| Distance from the Sun | 1025.6 light-years (314.5 parsecs) |
| Position (J2000) | RA 145.2229°, Dec 27.9502° |
| Constellation | Leo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-3856 b | 2.04 days | 0.0325 AU | 13.596 R⊕ | 171.63 M⊕ | Transit, 2025 |
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.