Please post some of your research and insights. Sounds interesting. I know very little on the subject.
Here’s the small bit I know about astrology and Roman history:
Augustus Denarius. Spanish mint, ca 17 BC. CAESAR AVGVSTVS, head left in oak wreath / DIVVS – IVLIVS across field, comet with eight rays & tail. RSC 97.
(Photo and attribution from Wildwinds.com)
This is the famous Augustus comet coin. The background information about this comet coin was discussed on cointalk.com. Great link:
https://www.cointalk.com/threads/ancients-caesars-comet.254853/