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Astron. Astrophys. 348, 1035-1039 (1999) AcknowledgementsThe authors are grateful to Dr B.G. Marsden who computed the orbital elements given in Table 4 and to the significant comments of the referee towards improving this paper. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: August 13, 199 ![]() |