TOI-1203 is 212 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this G3 V star; the first was found in 2021 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-1203 b goes round its star every 4.16 days, 21 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Spectral type | G3 V |
| Surface temperature | 5,737 K |
| Mass | 0.886 solar masses |
| Radius | 1.179 solar radii |
| Luminosity | 1.348 times the Sun |
| Apparent magnitude | 8.59 |
| Age | about 12.5 billion years |
| Distance from the Sun | 212.0 light-years (65.0 parsecs) |
| Position (J2000) | RA 168.2267°, Dec -34.4069° |
| Constellation | Hydra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-1203 c | 13.1 days | 0.104 AU from Kepler’s law | 2.2 R⊕ estimated | 5.46 M⊕ minimum | Radial Velocity, 2025 |
| TOI-1203 b | 4.16 days | 0.0487 AU | 1.52 R⊕ | 3.51 M⊕ | Radial Velocity, 2025 |
| TOI-1203.01 | 25.5 days | 0.163 AU | 2.918 R⊕ | 7.39 M⊕ | Transit, 2021 |
| TOI-1203 e | 204.6 days | 0.653 AU from Kepler’s law | 7.31 R⊕ estimated | 42.1 M⊕ minimum | Radial Velocity, 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.
For a star of 5,737 K, 1.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.11 to 1.95 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 212 years ago, around 1810.