AQ Com is a W UMa-type binary star with a period of 0.28133 days that was discovered about fifty years
ago. However, it was neglected for photometric investigation. Complete light curves in Rc and Ic bands are
presented that show a positive O’Conell effect. The light maxima following the primary minima are
higher than the other ones in both bands. Photometric solutions obtained with the W–D (Wilson and
Devinney) method suggest that AQ Com is a contact binary with a contact degree of f ¼ 21:4ð6:2Þ%.
It is found that the contact binary is a W-type system with a mass ratio of q ¼ 2:86 where the less massive
component is hotter than the more massive one in a common convective envelope. The asymmetries of
the light curves are explained by two dark spots on the more massive component. By combining several
determined times of light minimum with the others compiled from the literature, it is detected that the
Observed-Calculated (O-C) curve may display a cyclic change with a period of 8.5 years and an amplitude
of 0.0016 days. The cyclic oscillation may be caused by the presence of a cool third stellar object at an
orbital separation of about 4:2 AU. However, more data are needed to confirm the existence of the third
body.