Note: This is an X-ray source in the Large Magellanic Cloud. The epoch is the time of periastron and coincides closely with X-ray maximum. Other orbital elements have been published by R.H.D. Corbet et al. (Mon. Not. Roy. Astron. Soc., 212, 565, 1985). Although they also derive a high eccentricity, their value of omega (330 deg) indicates that the observed velocity is relatively positive at periastron, whereas Hutchings et al. find it to be relatively negative (i.e. compared with velocities observed at other phases). Although the elements found by Hutchings et al. are preferred here, the paper by Corbet et al. gives a much more detailed account of the spectroscopic properties of the system.