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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.

ContentsEquatorial coordinates of 4536 extragalactic radio sources in J2000.0 observed with VLBI.

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
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FormatFor format description see contents of the data file.
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