Share this entry

Share this page

astrometric binary

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

Definition of astrometric binary in English:

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.
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.

Definition of astrometric binary in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day cumbersome
Pronunciation: ˈkʌmbəs(ə)m
adjective
large or heavy and therefore difficult to carry…