periastron
McGraw-Hill Science & Technology Dictionary:
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periastron
(¦per·ē¦as·trən)
(astronomy) The coordinates and time when the two stars of a binary star system are nearest to each other in their orbits.
Wiley Book of Astronomy:
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periastron
The point of closest approach between two stars in a binary system.
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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