MICA 1990-1999 interactive astronomical almanacUnited States Naval ObservatoryEnglishData fileSoftware system created specially for astronomers, surveyors, meteorologists, navigators, and others who regularly need accurate information on the positions and motions of celestial objects. It provides high-precision astronomical data in tabular form for a variety of astronomical objects.1993Washington, DC, USA : Astronomical Applications Dept., The Observatory, [1993]Astronomy—Tables—Data processingNautical almanacs—Data processingEphemerides—Data processingData file