radio astrometry

radio astrometry

(ray -dee-oh) A branch of astrometry in which the coordinates of celestial objects are measured with high precision using a radio telescope. It has become more accurate than its optical counterpart in recent years with the advent of interferometers having very long and accurately determined baselines. See VLBI.
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VERA (VLBI Exploration of Radio Astrometry) and other VLBI arrays in the world were utilized to get most of the precise distances to about 50 objects and the data on their proper motions.
In this direction, Japanese VLBI Network (JVN) which incorporates the VLBI exploration of radio astrometry (VERA) array has made some significant contributions.

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