[4][7] The star system shows an infrared excess noise of unknown origin.
[9] In 2008 a study was undertaken of fourteen stars with exoplanets that were originally discovered using the transit method through relatively small telescopes.
These systems were re-examined with the 2.2 m (87 in) reflector telescope at the Calar Alto Observatory in Spain.
This discovery resulted in a recalculation of parameters for both the planet and the primary star.
[1] The re-examination of the WASP-2 spectrum in 2015, have resulted in the measurement of stellar companion temperature equal to 3513±28 K, and angular separation of 0.73 arc second.