The constellation is determined by the Gregorian calendar date. The Gregorian calendar date of July 16, 74 is September 2, and the constellation of that day is Virgo.
Lunar calendar: July 16, 74.
Main branch: Jiayin Ren Shen Bingwu
Gregorian calendar:1Monday, September 2, 974 Virgo.
Source: Hua.com.