HD 179949

Planetary system · 89.6 light-years away · also HD 179949, HIP 94645

HD 179949 is 89.6 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F8 V star; the first was found in 2000 by radial velocity (Anglo-Australian Telescope).

Fly there in 3D

Worth knowing

HD 179949 b goes round its star every 3.09 days, 28 times as often as Mercury goes round the Sun.

The star

Spectral typeF8 V
Surface temperature6,168 K
Mass1.21 solar masses
Radius1.26686 solar radii
Luminosity2.002 times the Sun
Apparent magnitude6.25
Ageabout 2.56 billion years
Distance from the Sun89.6 light-years (27.5 parsecs)
Position (J2000)RA 288.8890°, Dec -24.1798°
ConstellationSagittarius

Planets (1)

PlanetYearOrbitRadiusMassFound
HD 179949 b3.09 days0.0443 AU13.9 R⊕ estimated291.12 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 6,168 K, 2.0 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.31 to 2.30 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 90 years ago, within living memory.

Nearest systems to it

Also found by Anglo-Australian Telescope

Sources

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