TOI-5398 is 427 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G V star; the first was found in 2022 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-5398 c goes round its star every 4.77 days, 18 times as often as Mercury goes round the Sun.
| Spectral type | G V |
| Surface temperature | 6,000 K |
| Mass | 1.146 solar masses |
| Radius | 1.051 solar radii |
| Luminosity | 1.31 times the Sun |
| Apparent magnitude | 10.059 |
| Age | about 0.65 billion years |
| Distance from the Sun | 426.8 light-years (130.9 parsecs) |
| Position (J2000) | RA 161.8796°, Dec 36.3294° |
| Constellation | Leo Minor |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-5398 c | 4.77 days | 0.0570 AU | 3.52 R⊕ | 11.8 M⊕ | Transit, 2023 |
| TOI-5398 b | 10.6 days | 0.0980 AU | 10.3 R⊕ | 58.7 M⊕ | Transit, 2022 |
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 6,000 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 1.07 to 1.88 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 427 years ago, around 1600.