TOI-1803 is 389 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 4,687 K star; the first was found in 2025 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-1803 b goes round its star every 6.29 days, 14 times as often as Mercury goes round the Sun.
| Surface temperature | 4,687 K |
| Mass | 0.756 solar masses |
| Radius | 0.715 solar radii |
| Luminosity | 0.222 times the Sun |
| Apparent magnitude | 11.871 |
| Age | about 1.4 billion years |
| Distance from the Sun | 388.9 light-years (119.2 parsecs) |
| Position (J2000) | RA 178.0461°, Dec 35.1718° |
| Constellation | Ursa Major |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-1803 b | 6.29 days | 0.0600 AU | 2.99 R⊕ | 10.32 M⊕ | Transit, 2025 |
| TOI-1803 c | 12.9 days | 0.0970 AU | 4.29 R⊕ | 8 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.