WASP-17

WASP-17 is a main sequence star about 1,300 light years away in the constellation Scorpius. It has the spectral type F6V. 

WASP-17 is also known as Dìwö. The name was selected in the NameExoWorlds campaign by Costa Rica. At that time, it was the 100th anniversary of the IAU. Dìwö in Bribri language means the sun.

The star has about the same amount of heavy elements as the Sun. However, it has less carbon than the Sun. The carbon-to-oxygen molar ratio of 0.18 for WASP-17 is far below the solar ratio of 0.55.

 Planetary system 

An extrasolar planet known as WASP-17b was confirmed orbiting the star as of 2009. The star is unusual for the reason that WASP-17bBBC NEWS | Science & Environment |New-found Planet Orbits Backward is believed to orbit in the opposite direction to the direction the star spins and is said to be twice the size of Jupiter, but half its mass. It is subject to deep photo-evaporation, and may be completely destroyed within 1 billion years from now.D. Ehrenreich and J.-M. Désert, "Mass-loss rates for transiting exoplanets", 2011

WASP-17b was discovered by SuperWASP project. For this reason, the name of the planet and the star has WASP in them.

 References 

Category:Stars
Category:Scorpius