Resolutions taken during the General Assembly held in Buenos-Aires in 1991:

(1) The Working Group on Natural Satellites of Commission 20 recommends
that NASA make available to all investigators the positional observations 
of the satellites of the planets that have been made from spacecraft. 
Preferably these data should be made available in the form of right 
ascensions and declinations together with necessary auxiliary data such
as the position of the spacecraft at the observation time. The Viking and 
Mariner observations of Phobos and Deimos that have been prepared in support 
of the Soviet Phobos mission are excellent examples of what should be done 
to make this type of data available.

(2) Commission 20 recommends that its Working Group on Natural Satellites
study the creation of an international center of astrometric data on the 
natural satellites.Under the auspices of the IAU, this center would work 
to make these data widely available to researchers in this area of study.