Epochtool software transforms equatorial coordinates (RA and DEC) from arbitrary equinox to J2000
For MS Windows add CONFIG += console in .pro file.
N. Kirov, M. Tsvetkov, K. Tsvetkova, Technology for digitization of astronomical photographic plates, In: Proceedings of the 8th Annual International Conference on Computer Science and Education in Computer Science, 5–8 July 2012, Boston, USA, 109-114.
N. Kirov, M. Tsvetkov, K. Tsvetkova, WIDE-FIELD PLATE DATABASE: Software for Time and Coordinates Conversions