The KPNO's 4-m telescope was used in 1975-1981 to determine the epochs of 1164 speckle observations for 469 unresolved, known or suspected binary stars. The data, presented in tabular form, encompass visual binaries with eccentric orbits, occultation binaries, astrometric binaries, Hyades stars of known or suspected duplicity, and many long period spectroscopic binaries.
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Hartkopf et al. (1984) studied this question.
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