TOI-942

Planetary system · 497.7 light-years away · also TYC 5909-319-1

TOI-942 is 498 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K2.5 V star; the first was found in 2020 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

TOI-942 b goes round its star every 4.32 days, 20 times as often as Mercury goes round the Sun.

The star

Spectral typeK2.5 V
Surface temperature4,969 K
Mass0.822 solar masses
Radius0.894 solar radii
Luminosity0.438 times the Sun
Apparent magnitude11.982
Ageabout 0.053 billion years
Distance from the Sun497.7 light-years (152.6 parsecs)
Position (J2000)RA 76.6496°, Dec -20.2456°
ConstellationLepus

Planets (2)

PlanetYearOrbitRadiusMassFound
TOI-942 b4.32 days0.0487 AU3.89 R⊕826.36 M⊕Transit, 2020
TOI-942 c10.2 days0.0860 AU4.67 R⊕37 M⊕Transit, 2020

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 4,969 K, 0.44 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.66 to 1.19 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 498 years ago, around 1530.

Nearest systems to it

Also found by Transiting Exoplanet Survey Satellite (TESS)

Sources

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