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astrometric binary

(binary star system detected by observing the movement of a star)

An astrometric binary is a binary star system where one of the stars cannot be seen but the other one can be seen moving as if in orbit, i.e., through astrometry.

It is one of a number binary-star classes based upon how the star is determined to be binary. Others:


(star type,binary star type,astrometry)
http://en.wikipedia.org/wiki/Astrometric_binaries

Referenced by:
astrometry
binary star
eclipsing binary
spectroscopic binary
spectrum binary
visual binary

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