Augustus Denarius "Caesar's Comet" Ancient Roman Empire Silver Coin 19BC RIC 37BObverse: CAESAR AVGVSTVS, Head of Augustus, oak wreathed, left Reverse: DIVVS IVLIVS, Comet with eight rays and tail Date: c. 19 17 B. C. ID: RIC I Augustus 37B Size: 21mm diameter, 3. 52g weight Composition: Silver Caesar's comet was a bright comet that appeared four months after the assassination of Julius Caesar and during his birth month, July of 44 B. C. Octavian (later Augustus), Caesar's great nephew and heir, proclaimed the comet to be the