Astronomy and Astrophysics – Astronomy
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..689e&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, May 1984, p. 689-697.
Astronomy and Astrophysics
Astronomy
9
Eclipsing Binary Stars, Lunar Occultation, Speckle Patterns, Stellar Magnitude, A Stars, B Stars, O Stars, Stellar Luminosity, Visual Observation
Scientific paper
Three Hyades binary stars - SAO 93961, SAO 93955, and SAO 93925 - and SAO 163481 have all been observed numerous times at occultations by the moon. Although the observational circumstances are not under the observers' control, the resulting data are characterized by very high angular resolution. They permit unequivocal identification of primary and secondary objects and furnish data on magnitude differences between them. The results can be compared with speckle observations and with conventional visual observations. Moduli of the Hyades stars are found to be 3.12 (SAO 93961), 3.19 (SAO 93955), and, for the difficult case of SAO 93925, 4.0. Minor modifications of the deduced orbit for Beta Cap previously published (Evans and Fekel, 1979) are needed to accommodate speckle observations within their apparent observational uncertainties.
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