HD 101930

Planetary system · 97.9 light-years away · also HD 101930, HIP 57172

HD 101930 is 97.9 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K1 V star; the first was found in 2005 by radial velocity (La Silla Observatory).

Fly there in 3D

Worth knowing

HD 101930 b goes round its star every 70.5 days, 1.2 times as often as Mercury goes round the Sun.

HD 101930 is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.

The star

Spectral typeK1 V
Surface temperature5,108 K
Mass0.57 solar masses
Radius0.86 solar radii
Luminosity0.49 times the Sun
Apparent magnitude8.21
Ageabout 1 billion years
Distance from the Sun97.9 light-years (30.0 parsecs)
Position (J2000)RA 175.8756°, Dec -58.0054°
ConstellationCentaurus

The other star

HD 101930 B has no spectral type listed of magnitude 10.72, judged a true companion. In 2015 it was 73″ from HD 101930, at position angle 8° (Washington Double Star Catalog, 11435-5800 MUG 9): 2,192 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 101930 b70.5 days0.300 AU10.6 R⊕ estimated79.457 M⊕ minimumRadial Velocity, 2005

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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