HD 28471

Planetary system · 142.3 light-years away · also HD 28471, HIP 20625

HD 28471 is 142 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this G5 V star; the first was found in 2025 by radial velocity (La Silla Observatory).

Fly there in 3D

Worth knowing

HD 28471 b goes round its star every 3.16 days, 28 times as often as Mercury goes round the Sun.

The star

Spectral typeG5 V
Surface temperature5,766 K
Mass0.98 solar masses
Radius1.08 solar radii
Luminosity1.153 times the Sun
Apparent magnitude7.89
Ageabout 6.56 billion years
Distance from the Sun142.3 light-years (43.6 parsecs)
Position (J2000)RA 66.2875°, Dec -64.0787°
ConstellationReticulum

Planets (3)

PlanetYearOrbitRadiusMassFound
HD 28471 b3.16 days0.0420 AU1.75 R⊕ estimated3.72 M⊕ minimumRadial Velocity, 2025
HD 28471 c6.12 days0.0650 AU2.26 R⊕ estimated5.72 M⊕ minimumRadial Velocity, 2025
HD 28471 d11.7 days0.100 AU2.06 R⊕ estimated4.91 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 5,766 K, 1.2 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.02 to 1.80 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 142 years ago, around 1880.

Nearest systems to it

Also found by La Silla Observatory

Sources

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