20 10 what is the sign of a girl born on September 17th of the lunar calendar?

Constellation is a fortune-telling thing for westerners, because westerners have no lunar calendar. The constellation is based on the date of birth in the solar calendar.

Lunar calendar 20 10 September 17 = solar calendar 2010/0 October 24th = Scorpio.

Scorpio people have a low-key appearance, but they are full of ambition and mystery, and will not easily associate with others. Self-demanding, highly competitive and effective, with the ability to understand other people's ideas.