TOI-6303 is 496 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 3,977 K star; the first was found in 2025 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-6303 b goes round its star every 9.49 days, 9 times as often as Mercury goes round the Sun.
| Surface temperature | 3,977 K |
| Mass | 0.644 solar masses |
| Radius | 0.609 solar radii |
| Luminosity | 0.0819 times the Sun |
| Apparent magnitude | 14.639 |
| Age | about 6.4 billion years |
| Distance from the Sun | 496.5 light-years (152.2 parsecs) |
| Position (J2000) | RA 46.7807°, Dec 40.1472° |
| Constellation | Perseus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-6303 b | 9.49 days | 0.0761 AU | 11.59 R⊕ | 2493 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.