Using new and published photometric observations of \mu ^ { 1 } ~ { } { \mbox { Sco } } ( HR 6247 ) , spanning 70 years , a period of 1.4462700 ( 5 ) days was determined .
It was found that the epoch of primary minimum suggested by Shobbrook at HJD 2449534.178 requires an adjustment to HJD 2449534.17700 ( 9 ) to align all the available photometric datasets .
Using the resulting combined-data light-curve , radial velocities derived from IUE data and the modelling software P HOEBE , a new system solution for this binary was obtained .
It appears that the secondary is close to , or just filling , its Roche-lobe .