Gregorian calendar1986 What constellation was born in the early morning of July 23rd?

Cancer. Observe the movement of the astrolabe on the day you were born.

The coordinates assume Beijing, and the sun moves into Leo at noon 12: 33 that day. Before that, the sun was in Cancer for the last time. So you are a cancer.

The following two pictures

Figure 1 shows the astrolabe at noon 12: 33, showing that the sun sets in Leo at 0: 00.

Before that, the sun was in Cancer.

If your birthplace is far from Beijing in the east longitude, there may be some errors, but as long as you were born in the early hours of Chinese mainland, cancer is basically guaranteed.