What constellation is 5: 40 am 1985 12/22? Why does the astrolabe show Sagittarius, Sagittarius or Capricorn?

The 22nd is the boundary of constellations, and each constellation starts and ends on the 22nd.

Personal constellation (birthday map or celestial map for short) is a star map, and its arrangement position in the sky is exactly the same as the moment you were born. Therefore, in order to discharge a correct astrolabe, we must first have an exact date, time and place of birth.

With the time and place of birth, we can take conversion of time as standard time (GMT, Greenwich Mean Time) and find out the latitude and longitude of the place of birth.

I think it's Sagittarius. If your time and place have been converted into standard time, I believe the astrolabe is correct.

I hope I can help you, hehe ~