The constellation is determined by the date of the solar calendar. 1982 Lunar August 14 Gregorian calendar date is September 30th, and the constellation of that day is Libra.
Lunar calendar: August 14, 82.
Main branches: Ren Xu, Ji You and Chen Bing.
Gregorian calendar:1September 30th, 982 Thursday Libra.
Source: Hua.com.