According to Chinese astrology, a person's destiny can be determined by the position of the major planets at the person's birth along with the positions of the sun, moon, comets, the person's time of birth, and zodiac sign. The system of the twelve-year cycle of animal signs was built from observations of the orbit of Jupiter (the Year Star; ). Following the orbit of Jupiter around the sun, Chinese astronomers divided the celestial circle into 12 sections, and rounded it to 12 years (from 11.86). Jupiter is associated with the constellation "Sheti" (- Boötes) and is sometimes called Sheti.