January 18, 1952 (, twelfth lunar 22) Xin Mao, Taiwan astronomers Cai Zhang Xian found the Monoceros irregular variable star.

Cai Zhang Xian (1923 -) astronomers. Taipei, Taiwan people. After graduating from high school, [L $ dj��.����T] went to Japan to study astronomy. In 1947 to return to Taiwan Taiwan Provincial Meteorological Bureau Assistant Technician, in Zhongshan Hall Observatory. Taipei Astronomical Association, formed in 1948, he served as the Director-General. 1949 of astronomical communication "magazine editor. In 1952 he was promoted to technician found the unicorn constellation of stars BD-8.1642 of variable stars, named for the International Astronomical Union Member CSV6534. 1961. Ren Tianwen the Director-General of the Society in 1964. Served as Taipei Observatory, in 1969. (History TodayOnHistory.com) 1970 the International Year of Astronomy Federation Harvard College Observatory discovered the asteroid 2240 named "Cai Zhang Xian Star" and was the "Executive Yuan" Outstanding Technology Honor Award. In 1981, he was appointed the Taipei Astronomical Association. 1982 Adjunct Ministry of Education, Science Education Steering Committee and Advisory Committee. Of astronomical noun control "," Easy constellation diagram, "standard stellar map.