apastron

[ uh-pas-truhn, -tron ]
noun,plural ap·as·tra [uh-pas-truh]. /əˈpæs trə/. Astronomy.

  1. the point at which the stars of a binary system are farthest apart (opposed to periastron).

Origin of apastron

1
<New Latin <Greek ap-ap-2 + ástron star, constellation; on the model of apogee

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

Scientific definitions for apastron

apastron

[ ə-păs′trən ]

  1. The point at which an object, such as a planet or comet, is farthest from the center of mass of the star it is orbiting. Compare periastron.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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