The sun is also a star, so why doesn't it belong to which constellation?

Constellation is the sum of celestial spaces in an area projected on the celestial sphere. Because most of the stars are far away from the earth, the relative position of each star has not changed much (in the thousands of years of human observation history, only a few stars themselves are larger), so most of the stars are fixed in a relative position on the celestial sphere, so it is said that XXX belongs to XXX constellation. In a year, the sun rotates 360 degrees on the celestial sphere and passes through 13 constellations, so we don't say which constellation the sun belongs to, only which constellation the sun is in at a certain moment.