The "Star of Bethlehem Coin" Bronze AE 20, RPC I 4269; BMC Galatiaia pg 159, 65, gVF, 6.90 gm, 20.0mm, Antioch mint, 13 - 14 A.D.; obverse Zeus' laureate head right; reverse EPI SILANOU ANTIOCEWN, ram running right, looking back, star above, JM (year 43) below.
Michael Molnar, an astronomer, believes this coin depicts Jupiter's occultation of Aries in 6 B.C., the most probable "Star of Bethlehem."
http://www.eclipse.net/~molnar/