TOI-1117

Planetary system · 546.6 light-years away

TOI-1117 is 547 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this G5 V star; the first was found in 2025 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

TOI-1117 b goes round its star every 2.23 days, 39 times as often as Mercury goes round the Sun.

The star

Spectral typeG5 V
Surface temperature5,635 K
Mass0.97 solar masses
Radius1.05 solar radii
Luminosity0.36 times the Sun
Apparent magnitude11.016
Ageabout 4.42 billion years
Distance from the Sun546.6 light-years (167.6 parsecs)
Position (J2000)RA 273.6021°, Dec -66.4200°
ConstellationPavo

Planets (3)

PlanetYearOrbitRadiusMassFound
TOI-1117 b2.23 days0.0330 AU2.46 R⊕8.9 M⊕Transit, 2025
TOI-1117 c4.58 days0.0534 AU2.91 R⊕ estimated8.78 M⊕ minimumRadial Velocity, 2025
TOI-1117 d8.66 days0.0817 AU3.27 R⊕ estimated10.71 M⊕ minimumRadial 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.

The planets, compared

For a star of 5,635 K, 0.36 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.58 to 1.02 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 547 years ago, around 1480.

Nearest systems to it

Also found by Transiting Exoplanet Survey Satellite (TESS)

Sources

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