HD 188753

This planet, which received the designation HD 188753 Ab, was announced by a Polish astronomer working in the United States, Dr. Maciej Konacki.

[11] The detection of this planet has been challenged by Eggenberger et al.[8][12] The candidate planet, a hot Jupiter gas giant slightly more massive than Jupiter, was thought to orbit the star HD 188753 A once every 80 hours or so (3.3 days), at a distance of about 8 million kilometers, a twentieth of the distance between Earth and the Sun.

The existence of HD 188753 Ab in a relatively close triple star system challenged the current models of planet formation.

The current idea is that giant planets form in the outer reaches of their system (in orbits similar to those of Jupiter and Saturn).

[8] Konacki responded to this, stating that the precision of the follow-up measurements was not sufficient to confirm or deny the planet's existence and that he planned to release an update in 2007.