TOI-426

Planetary system · 370.5 light-years away · also HD 34390, HD 34390 A

TOI-426 is 370 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G2 V star; the first was found in 2026 by transit (Transiting Exoplanet Survey Satellite (TESS)).

Fly there in 3D

Worth knowing

TOI-426 b goes round its star every 31.7 hours, 67 times as often as Mercury goes round the Sun.

The star

Spectral typeG2 V
Surface temperature5,750 K
Mass1 solar masses
Radius0.99 solar radii
Luminosity0.9506 times the Sun
Apparent magnitude10.116
Ageabout 1.57 billion years
Distance from the Sun370.5 light-years (113.6 parsecs)
Position (J2000)RA 79.1022°, Dec -15.5102°
ConstellationLepus

Planets (2)

PlanetYearOrbitRadiusMassFound
TOI-426 b31.7 hours0.0237 AU2.19 R⊕6.7 M⊕Transit, 2026
TOI-426 c235.8 days0.747 AU13.6 R⊕ estimated444 M⊕ minimumRadial Velocity, 2026

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.

Sources

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