Constellations are determined by the date of the solar calendar. 1July 26th, 974, the Gregorian calendar date is1September 2nd, and the constellation of that day is Virgo.
Lunar calendar: July 26th, 74.
Four pillars: Jiayin, Gui You and Chen Bing.
Gregorian calendar:1September, 9741Tuesday Virgo
Source: Hua.com.