Peremennye Zvezdy", . ... Period: . 12.4 d; . ... We report photometric monitoring of the pre-main sequence binary AK Sco covering about 45 days in 2003. ... Nowadays we recognize AK Sco as a double-lined spectroscopic binary with large eccentricity (e=0.47) and spectroscopic orbital period of 13.6 days (Andersen et al. ... The light curve shows brightness variation with an amplitude of about 0.3 magnitude and changes reaching 0.2 magnitude from night to night. ... Light curve of AK Sco. ...