Subject: Re: OFSP proposal for standard RA,Dec keywords

From: ptw at rlstar.bnsc.rl.ac.uk (P.T.Wallace)
Date: Tue, 22 Jun 1993 08:36:43 +0100

A small technical point - if the RADECSYS/EQUINOX proposal is
adopted, I suggest that the text should not say that EQUINOX
is in years AD, but that it is "either a Besselian epoch or a
Julian epoch as appropriate for the specified RADECSYS, e.g. 1950.0
for 'FK4' or 2000.0 for 'FK5'".