Constellations are determined by the date of the solar calendar. 1986 The Gregorian calendar date on August 22nd of the lunar calendar is September 25th, and the constellation of that day is Libra.
Lunar calendar: August 22, bingyin year.
Branch: Bing Yin Ding You Ren Shen
Gregorian calendar:1Thursday, September 25th, 986 Libra
Source: Hua.com.