HD 46375

Planetary system · 96.4 light-years away · also HD 46375, HIP 31246

HD 46375 is 96.4 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K1 IV-V star; the first was found in 2000 by radial velocity (W. M. Keck Observatory).

Fly there in 3D

Worth knowing

HD 46375 b goes round its star every 3.02 days, 29 times as often as Mercury goes round the Sun.

HD 46375 is one of 2 stars in its system. The position of the other star is not catalogued, so only HD 46375 and its planets are drawn.

The star

Spectral typeK1 IV-V
Surface temperature5,285 K
Mass0.92 solar masses
Radius0.914196 solar radii
Luminosity0.5688 times the Sun
Apparent magnitude7.91
Ageabout 9 billion years
Distance from the Sun96.4 light-years (29.6 parsecs)
Position (J2000)RA 98.3031°, Dec 5.4625°
ConstellationMonoceros

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 46375 b3.02 days0.0398 AU10 R⊕ estimated71.8 M⊕ minimumRadial Velocity, 2000

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 5,285 K, 0.57 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.74 to 1.32 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 96 years ago, within living memory.

Nearest systems to it

Also found by W. M. Keck Observatory

Sources

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