TOI-544 is 134 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 4,169 K star; the first was found in 2022 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-544 b goes round its star every 37.2 hours, 57 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.
| Surface temperature | 4,169 K |
| Mass | 0.631 solar masses |
| Radius | 0.623 solar radii |
| Luminosity | 0.1258 times the Sun |
| Apparent magnitude | 10.777 |
| Age | about 9 billion years |
| Distance from the Sun | 134.1 light-years (41.1 parsecs) |
| Position (J2000) | RA 82.2901°, Dec -0.3429° |
| Constellation | Orion |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-544 b | 37.2 hours | 0.0225 AU | 2.018 R⊕ | 2.89 M⊕ | Transit, 2022 |
| TOI-544 c | 50.1 days | 0.228 AU from Kepler’s law | 4.92 R⊕ estimated | 21.5 M⊕ minimum | Radial Velocity, 2023 |
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 4,169 K, 0.13 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.36 to 0.68 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 134 years ago, around 1890.