Calculate the longitude and orbital motion for Amaletha, Europa, Ganymede and Callisto satellites

الملخص EN

The orbital motion and longitude for some Jupiter's satellites (Amaletha, Europa, Ganymede and Callisto) were calculated from two different locations Iraq and Syria.

A program was designed, the input parameters were the desired year, month, day and the longitude of the location, the output parameters results were applied in form of a file, and this file includes the longitude, orbital motion, and local time of these satellites.

A specific date 1-10-2013 was taken, the results of longitude was (20-336) º and orbital motion was (92-331) º for both Iraq and Syria location with observing time (05 : 24 : 14-15 : 18 : 10) for Iraq and (04 : 56:33-14 : 50 : 30) for Syria.

The difference in time between the two locations was constant (00 :45 : 00), these results were compared with the results of Gilbert in 1974, but he worked only on the longitude with respect to the universal time, which his values was (34-296)º.