WASP-17

Planetary system · 1323.9 light-years away · also TYC 6787-1927-1

WASP-17 is 1,324 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F4 star; the first was found in 2009 by transit (SuperWASP).

Fly there in 3D

Worth knowing

WASP-17 b goes round its star every 3.74 days, 24 times as often as Mercury goes round the Sun.

The star

Spectral typeF4
Surface temperature6,550 K
Mass2.28 solar masses
Radius1.49 solar radii
Luminosity4.099 times the Sun
Apparent magnitude11.588
Ageabout 2.65 billion years
Distance from the Sun1323.9 light-years (405.9 parsecs)
Position (J2000)RA 239.9622°, Dec -28.0618°
ConstellationScorpius

Planets (1)

PlanetYearOrbitRadiusMassFound
WASP-17 b3.74 days0.0515 AU20.961 R⊕247.91 M⊕Transit, 2009

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 6,550 K, 4.1 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.84 to 3.19 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 1,324 years ago, around AD 700.

Nearest systems to it

Also found by SuperWASP

Sources

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