A short program for the Besselian C and D
Abstract
Errors in the standard reductions for aberration can sometimes reach 0" 0I (at declinations below 700) if secondorder corrections are not applied. If that is acceptable, the previouslypublished computer program for C and D can be simplified to C =  8" Oo . #.00787cosJ and D =  o" 6sin #. .00858sinJ where Q contains only four terms, and M and J are the mean longitudes of the Moon and Jupiter. This program has been extensively compared with the previous very precise one, and the standard deviations are + 0 00I7 and t 0#.00I8 in C and D respectively. If the terms in M and J are also dropped, the values become + 0" 0078 and + o" oo8 , and even these can be accepted in most radial velocity work.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 August 1975
 DOI:
 10.1093/mnras/172.2.469
 Bibcode:
 1975MNRAS.172..469A