The severan dynast was particularly obsessed by astrology

Hadrian's star coin


The provincial coins of Septimus Severus seems to be centred on Nikopolis
Interestigly all five of visibles planets were alied in the night sky recently.

Septimus Severus star coins






Furthermore, the grouping of these coins in the later part of the second century may have significance.

Geta star coin



Computer models have suggested that two eclipses , one annular the other total, occured in the northern hemisphere in the 183 CE ( Common Era = AD) . This would place it in the reign of Commodus

Commodus star coin



Two eclipses in the same year (July 4, and Dec. 28) would have been exceedingly rare and noteworthy especially with the Annular eclipse occurring almost at the new year (the July 4, eclipse was total)

All of the emperors mentioned ruled within 19 years of each other.

Caracalla star coin


Whether the purpose of the crescent/star motif is related to eclipses (in which planets become visible by day), lunar or planetary conjunctions of the Plaeidies (7 sisters) and/or other planets, or simple repesentation of Roman cosmology may never be known for sure

The coin with Zeus on the obverse and a leaping ram on the reverse represents a planetary conjunction in the constellation Aries


Antioch star coin


According to Michael Molnar, the now famous "Star of Bethlehem" coin supposedly depicts Jupiter's occultation of Aries twice in April 6, BCE.

A later coin from Antioch with a similar theme - Tyche on obverse with Venus(?) occulting the moon in Aries. Another famous depiction of a planetary conjunction is Julian II's two stars in Tarus reverse.
Celestial objects depicted on coins makes for a very interesting focus for collecting.

Julian II coin with tarus reverse



Orodes II coins





the Parthian coin of Orodes II , from middle east, depics two stars and the crescent moon.
other coins , one star with a crescent wile others do not have a crescent.


Artukid coin
from the Artukid dynasty (12th century) Turkey



The two figures on the obverse represent the Sun and Mercury.
Other Artuqid coins have personifications of different combinations of planets and/or the sun