This pages provide data of successive realizations of the International Celestial Reference Frame (ICRF) by VLBI. Please, refer to the article (link to ADS) and to the associate data at CDS (including ReadMe files) for more information.
ICRF3 | ||||
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Data at S/X Data at K Data at X/Ka |
Charlot et al. (2020) |
  
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4,536 objects at S/X 824 objects at K 678 objects at X/Ka | |
ICRF2 | ||||
|
Data |
Fey et al. (2015) |
|
3,414 objects | |
ICRF1 Extension 2 | ||||
|
Data |
Fey et al. (2004) |
|
717 objects | |
ICRF1 Extension 1 | ||||
|
Data |
Gontier et al. (2002) |
|
667 objects | |
ICRF1 | ||||
|
Data |
Ma et al. (1998) |
|
608 objects | |