This article examines the possible roots of the sixth-century astrologer/astronomer, Varāhamihira. Ritual instructions from astrological texts on the yātrā are compared with the preliminary services of the Atharvaveda Śāntikalpa to demonstrate that much of the astrological ritual system can be seen as an adaptation of Atharvan śānti ritual. This analysis illuminates both the possible interchange between Vedic and Jyotiḥśāstric ritual systems and Varāhamihira’s considerable expertise as a ritualist.