HD 66428

Planetary system · 173.8 light-years away · also HD 66428, HIP 39417

HD 66428 is 174 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G8 IV (+ G) star; the first was found in 2005 by radial velocity (W. M. Keck Observatory).

Fly there in 3D

Worth knowing

HD 66428 c takes 28.7 years to go round its star once.

The star

Spectral typeG8 IV (+ G)
Surface temperature5,716 K
Mass1.01 solar masses
Radius1.13 solar radii
Luminosity1.247 times the Sun
Apparent magnitude8.25
Ageabout 3.515 billion years
Distance from the Sun173.8 light-years (53.3 parsecs)
Position (J2000)RA 120.8692°, Dec -1.1636°
ConstellationMonoceros

Planets (2)

PlanetYearOrbitRadiusMassFound
HD 66428 b6.2 years3.395 AU12.4 R⊕ estimated3478.9 M⊕Radial Velocity, 2005
HD 66428 c28.7 years9.408 AU13.5 R⊕ estimated560.65 M⊕Radial Velocity, 2021

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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