In the Python Skyfield library there is a position object
skyfield.positionlib.ICRF, in the documentation it states:
An (x,y,z) position and velocity oriented to the ICRF axes.
The International Coordinate Reference Frame (ICRF) is a permanent reference frame that is the replacement for J2000. Their axes agree to within 0.02 arcseconds. It also supersedes older equinox-based systems like B1900 and B1950.
From my minimal knowledge in surrounding these topics this look to be a typo? I cannot find a reference or any documentation relating to the "International Coordinate Reference Frame" only to the "International Celestial Reference Frame".
Also based on what I've read/learned about the International Celestial Reference Frame the documentation from Skyfield seems to be describing just that. Further leading me to believe this is a typo.
Can anyone clarify if the "International Coordinate Reference Frame" is an actual thing?