  The MOST photometric space mission discovered an eclipsing binary among its
guide stars in June 2006 which combines a relatively large eccentricity e =
0.20 with an orbital period of only 2.27 days. HD 313926 appears to consist of
two early-type stars of spectral type B3 - B7. It has a largest eccentricity
among known early-type binaries with periods less than 3.5 d. Despite the large
components indicated by its spectral type and light curve model, and its short
period, the orbit of HD 313926 has not yet circularised so it is probably very
young, even compared to other young B stars.
