Definition of astrometric binary in English:

astrometric binary

Syllabification: as·tro·met·ric bi·na·ry
Pronunciation: /ˌastrōˈmetrik ˈbīnərē
 
/

noun

Astronomy
  • A binary star system in which one companion is invisible, but is known to be present from its effect on measurements relating to the other.
    More example sentences
    • As technology has improved over time, a number of binaries originally identified as astrometric binaries have been upgraded to visual binary because of the sighting of the secondary in the system.
    • About a hundred astrometric binary candidates have been discovered by Hipparcos.
    • Thus Sirius was originally an astrometric binary, but is now a visual binary.

More definitions of astrometric binary

Definition of astrometric binary in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
noun
a powerful whirlpool in the sea