It is approximately 1,400 light-years (430 pc) away orbiting the star GSC 02620-00648, in the constellation Hercules.

[2] The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 6.3±4.7°.

[4] The planet is slightly less massive than Jupiter (0.919 ± 0.073 MJ) but its diameter is 84% larger.

This give TrES-4 an average density of only about a third of a gram per cubic centimetre, approximately the same as Saturn's moon Methone.

The probable causes are the proximity to a parent star that is three to four times more luminous than the Sun as well as the internal heat within the planet.