The International Celestial Reference Frame (ICRF)
The International Celestial Reference Frame (ICRF) realizes an ideal reference system, the International Celestial Reference System (ICRS), by precise equatorial coordinates of extragalactic radio sources observed in Very Long Baseline Interferometry (VLBI) programmes.
Contents | Equatorial coordinates of 608 extragalactic radio sources in J2000.0 observed with VLBI. | ||||
Accuracy | Uncertainties are given in the file.
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Updates |
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Public access | http://hpiers.obspm.fr/icrs-pc/newwww/index.php | ||||
Format | For format description see contents of the data file. | ||||
Documentation | |||||
Product Centre | IERS ICRS Centre |