What constellation is September 12?

Virgo.

According to Baidu Encyclopedia, Virgo is the sixth house of the zodiac. Its date of birth is from August 23rd to September 22nd, east of Leo, and September 12 is between August 23rd and September 22nd, so it is Virgo.

Constellation refers to one of the indispensable components of astrology, and also refers to the combination of stars in the sky. Since ancient times, human beings have associated three or five stars with their mythical figures or artifacts, which are called "constellations".