1996PASP..108..404M

We report photometric uvbyoi observations of the variable KO Aql obtained during the summer of 1993. One time of primary minima was observed, and improved quadratic and linear ephemerides were calculated. Eclipse timings of KO Aql, spanning over a sixty year interval, show that the system is undergoing a period increase of 1.7 (± 0.1) X 10^-8 days/cycle. Analysis of our photometry with the new Wilson eclipsing binary computer program indicates that the mass ratio of the system is 0.29 and that the secondary star is cooler than the previously determined G0 spectral type. The masses and radii of the two components are also estimated.