HD 163607

Planetary system · 221.1 light-years away · also HD 163607, HIP 87601

HD 163607 is 221 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G5 star; the first was found in 2012 by radial velocity (W. M. Keck Observatory).

Fly there in 3D

Worth knowing

HD 163607 b goes round its star every 75.2 days, 1.2 times as often as Mercury goes round the Sun.

The star

Spectral typeG5
Surface temperature5,522 K
Mass1.12 solar masses
Radius1.76 solar radii
Luminosity2.63 times the Sun
Apparent magnitude8
Ageabout 8.6 billion years
Distance from the Sun221.1 light-years (67.8 parsecs)
Position (J2000)RA 268.4181°, Dec 56.3925°
ConstellationDraco

Planets (2)

PlanetYearOrbitRadiusMassFound
HD 163607 b75.2 days0.362 AU13.9 R⊕ estimated249.05 M⊕ minimumRadial Velocity, 2012
HD 163607 c3.5 years2.390 AU13.3 R⊕ estimated699.54 M⊕ minimumRadial Velocity, 2012

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 5,522 K, 2.6 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.56 to 2.78 AU. 1 of its 2 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 221 years ago, around 1800.

Nearest systems to it

Also found by W. M. Keck Observatory

Sources

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