Appulse
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Appulse is the least apparent distance between one celestial object and another, as seen from a third body during a given period. Appulse is seen in the apparent motion typical of two planets together
The Moon and Venus in the evening sky on three consecutive days. The centre image shows an appulse between the two objects.
Astronomical object
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An astronomical object, celestial object, stellar object or heavenly object is a naturally occurring physical entity, association, or structure that exists within the universe. In astronomy, the terms
Composite image showing the round dwarf planet Ceres; the slightly smaller, mostly round Vesta; and the much smaller, much lumpier Eros
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Mimas Cassini
Portrait of Jupiter from Cassini