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The 3rd realization of the International Celestial Reference Frame (ICRF3) 

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 4536 extragalactic radio sources in J2000.0 observed with VLBI.

Accuracy

Uncertainties are given in the files.

Data at S/X:

R.A. [s]0.00000202 - 0.00899265
Dec. ["]0.0000303 - 0.2507685

Data at K:

R.A. [s]0.00000245 - 0.00086595
Dec. ["]0.0000613 - 0.0118579

Data at X/Ka:

R.A. [s]0.00000291 - 0.00446018
Dec. ["]0.0000470 - 0.0735481
Public access

http://hpiers.obspm.fr/icrs-pc/newwww/index.php

Format

For format description see contents of the data file.

Documentation

http://hpiers.obspm.fr/icrs-pc/newwww/icrf/index.php

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