visual binary


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Related to visual binary: eclipsing binary, spectroscopic binary

visual binary

n.
A binary star that can be resolved visually or telescopically into its two components.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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"This is the first pair of black holes to be seen as separate objects that are moving with respect to each other, and thus makes this the first black-hole 'visual binary,'" said Greg Taylor, of the University of New Mexico (UNM).
So far, no trustworthy case is known of a visual binary system having shown an eclipse.
The [Mu.sup.2] pair is a visual binary with a period of only 265 years.
Struve 2576 (X2576 or STF 2576) is a visual binary with an orbital period of 232 years.
Preliminary orbital elements in the internet-based Sixth Catalog of Orbits of Visual Binary Stars give this pair an orbital period of 554 years, plus or minus 27 years.