The program for MOID calculations, presented on this website, is suitable for any confocal, elliptical orbits. It uses the idea of rotating meridional plane and calculates the MOIDs numerically. The authors hope that its speed and accuracy make it applicable not only for single orbital pairs, but also in massive calculations for mapping purposes. The code of the program was written and compiled using Gfortran 95 and is available in section Downloads.

This work was supported by the Polish National Science Center under Grant No. 2011/01/B/ST9/05442. H.R. is also indebted to Grant No. 74/10:3 of the Swedish National Space Board.

The program for MOID calculation uses the database of orbital elements of numbered asteroids, downloaded from IAU Minor Planet Center http://www.minorplanetcenter.org/iau/mpc.html