HD 75289

Planetary system · 95.0 light-years away · also HD 75289, HIP 43177

HD 75289 is 95.0 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G0 star; the first was found in 1999 by radial velocity (La Silla Observatory).

Fly there in 3D

Worth knowing

HD 75289 b goes round its star every 3.51 days, 25 times as often as Mercury goes round the Sun.

HD 75289 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 typeG0
Surface temperature6,117 K
Mass1.29 solar masses
Radius1.23 solar radii
Luminosity2.053 times the Sun
Apparent magnitude6.35
Ageabout 5.6 billion years
Distance from the Sun95.0 light-years (29.1 parsecs)
Position (J2000)RA 131.9182°, Dec -41.7378°
ConstellationVela

The other star

HD 75289 B is a M5 star of magnitude 11.8, judged a true companion. In 2017 it was 21.3″ from HD 75289, at position angle 77° (Washington Double Star Catalog, 08477-4144 MUG 6 AB): 620 AU on the sky at this distance. The true distance can only be larger.

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 75289 b3.51 days0.0500 AU14.2 R⊕ estimated155.74 M⊕ minimumRadial Velocity, 1999

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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