The IAU 2000/2006 Changes to Celestial Reference Systems: a Bluffer's Guide

Details The IAU 2000/2006 Changes to Celestial Reference Systems: a Bluffer's Guide The IAU 2000/2006 Changes to Celestial Reference Systems: a Bluffer's Guide

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..394..179w&link_type=abstract

Astronomical Data Analysis Software and Systems ASP Conference Series, Vol. 394, Proceedings of the conference held 23-26 Septem

Astronomy and Astrophysics

Astronomy

Scientific paper

No sooner had we all learnt to write ``FK5 J2000'' next to RA,Decs than
the IAU went and changed everything. What are ICRS, BCRS, GCRS, CIRS,
TIRS and ITRS? And the CIP and CIO? And the mysterious ``quantity s''?
There have even been rumours that sidereal time no longer exists. What
is going on, and what difference does any of this make to data analysis?

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