<b>Field 22</b>: Mean error of the proper motion in right ascension



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Field 22: Mean error of the proper motion in right ascension

The mean error of the proper motion in right ascension () is given in field 22. It is expressed in units of milli-arcsec per year.



The Meudon Hipparcos Input Catalogue Team
mer 16 nov 15:51:31 MET 1994