Luoxiahong (about 156-87 BC) was named Charlotte. Long-term worker, born in Langzhong (now Langzhong City, Sichuan Province), Ba County, Western Han Dynasty. Outstanding folk astronomers and astronomers in ancient times. Xiao Ming astronomy, seclusion folk. Emperor Yuanfeng was called to make a new calendar in Chang 'an in the sixth year. In the first year of Taichu (BC 104), the first complete new calendar with written records in the history of China, taichu calendar, came out. He reformed the unreasonable year-end system and changed it to the first month in Meng Chun. From then on, he was honored as "Old Man Spring Festival travel rush" by later generations. Incorporate the 24 solar terms into the China calendar system; Reforming the setting method of leap makes the arrangement of service, phenology and month more accurate, and plays an extremely important role in agricultural production and people's life. The armillary sphere he created is the first relatively precise and complete observation instrument in the world. His "Huntian" theory is the earliest advanced cosmic structure theory centered on the earth in the world. In order to meet the needs of calendar calculation, he also invented a "pass rate" algorithm for calculating progressive scores by applying stage division. His theory and achievements have a great influence on later astronomers in China, such as Zhang Heng, Monk and his party, Langzhong Ren, Ren Wengong and his son, and Zhou Qun's grandparents and grandchildren. When Bashu called him "the former saint"; In the history of science and technology in China, Joseph Needham called him a "brilliant constellation" in the field of world astronomy.
On September 6, 2004, with the approval of the Nomination Committee for Small Objects of the International Astronomical Union, the National Astronomical Observatory of the Chinese Academy of Sciences named this asteroid with the international permanent number of 16757 as "sunset red star".
Folk astronomer Luo
The right to build tools and images
In order to make a calendar, Luo also made his own astronomical instruments. The observation instruments he made, namely the armillary sphere (also known as armillary sphere and armillary sphere), were placed concentrically on the equator and several other rings, with a diameter of 8 feet. Some rings are fixed, others can rotate, and peepholes are attached for easy observation.
According to the literature, Luoxiahong also made astronomical display instruments, namely, Hunxiang (also known as Huntian), "Huntian is on the ground" and "due east-due west, and the faint star is complete and not bad".
As Zhu Wenxin, a historian of modern astronomy, said, "Since the Han Dynasty, the power of instruments and images has been established." It seems that Luoxiahong has developed both astronomical observation instruments and astronomical demonstration instruments, and it has already reached a certain scale. Later astronomers, such as Jia Kui and Zhang Heng, improved and developed it on the basis of Falling Hong. Luo's contribution to astronomy, especially to Huntian studies, has played an important role in promoting the development of astronomy in China.