HD 188753 is a hierarchical triple star system approximately 151 light-years away in the constellation of Cygnus, the Swan. In 2005, an extrasolar planet was announced to be orbiting the primary star (designated HD 188753 A) in the system.

Jul 13, 2005 · A NASA-funded astronomer has discovered a world where the sun sets over the horizon, followed by a second sun and then a third. The new planet, called HD 188753 Ab, is the first known to reside in a classic triple-star system.

Dec 14, 2017 · This artist's concept shows the orbits of a triple-star system called HD 188753, which was discovered to harbor a gas giant, or "hot Jupiter," planet. Image credit: NASA/JPL-Caltech.

We calculate cross sections for various scenarios that could have led to the multiple system currently observed and conclude that component A of HD 188753 with its planet was most likely formed in isolation, to be swapped into a triple star system by …

Jul 14, 2005 · Here I report the detection of an unusual hot Jupiter orbiting the primary star of a triple stellar system, HD 188753. The planet has an orbital period of 3.35 days and a minimum mass of 1.14...

HD 188753 is a near-eighth-magnitude class G or K (K0 or G9) star 145 light years away that falls more or less in between Delta and Gamma Cygni. It is a triple in which the primary is orbited by a close double at a mean separation of 12.3 Astronomical Units (29 percent farther than Saturn is from the Sun) with a looping orbit that takes the ...

Jul 13, 2005 · Konacki's planet is in the triple-star system known as HD 188753, which lies about 149 light years from Earth, in the Cygnus constellation. The star at the centre of the system is very much like...

HD 188753: Triple Sunset Illustration Credit: courtesy JPL-Caltech, NASA. Explanation: Although it looks like fiction, this artist's vision of sunset on an alien world is based on fact -- the recent discovery of a hot, jupiter-sized planet orbiting in triple star system HD 188753.

The graph in figure 1 shows the "wobble" of a star being tugged on by the planet called HD 188753 Ab. The planet was discovered via the radial velocity technique, in which a planet's presence is inferred by the motion, or wobble, it causes in its parent star.

HD 188753 is a hierarchical triple star system approximately 151 light-years away in the constellation of Cygnus, the Swan. In 2005, an extrasolar planet was announced to be orbiting the primary star (designated HD 188753 A) in the system. Follow-up measurements by an independent group in 2007 did not confirm the planet's existence.