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First detection of the astrometric orbit of the single-lined spectroscopic binary epsilon LibraeThe Multichannel Astrometric Photometer of the University of Pittsburgh's Allegheny Observatory was used to successfully measure for the first time the astrometric orbit of the single-lined spectroscopic binary epsilon Lib. Solution of the orbit indicates that the secondary component is a 0.5-solar-mass star, assuming that the F5 IV primary is 1.3 solar mass. If the secondary is on the main sequence, then it is later than a K5 star, but earlier than an M2 star. In addition to detection of the astrometric orbit of epsilon Lib, two references stars used in the observations, AO 754 and AO 755, are found to be a common-proper-motion pair.
Document ID
19890048778
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Castelaz, Michael W.
(Allegheny Observatory Pittsburgh, PA, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Publication Information
Publication: Astronomical Journal
Volume: 97
ISSN: 0004-6256
Subject Category
Astronomy
Accession Number
89A36149
Funding Number(s)
CONTRACT_GRANT: NAGW-1270
CONTRACT_GRANT: NSF AST-86-17642
Distribution Limits
Public
Copyright
Other

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