利用相邻帧中恒星不变矩相等的特性，寻找三颗恒星作为参考恒星组；
It finds three stars as reference star group used the character that star moment invariants are equal in neighbor frames.
参考星：已知位置和/或星等的恒星，用于确定图片的底片常数和光度校准。
Reference Stars: Star with known position and/or magnitude, that are used to find the plate constants and photometric calibration of an image.
目标模拟器用来模拟作为卫星姿态敏感器的参考目标(太阳、地球和恒星等)的环境特性。
Target simulators are used to simulate the environment character of reference objects (the sun, the earth and stars) as satellite attitude sensors.
红矮星gliese 581没有被正式命名，它出现在德国天文学家威廉·葛利斯(William Gliese)编纂的恒星目录中，参考号为581。
The star has not been given a proper name. It appears in a catalogue of stars compiled by the German astronomer William Gliese where it has been given the reference number 581.
直到目前，对于CCD观测者唯一合适可用的星表是GSC(哈勃空间望远镜的引导星参考星表)，它包含1.8亿个目标(恒星和星系)。
Until quite recently, the only useable catalogue for CCD observers was the Hubble Space Telescope's Guide star catalogue (GSC), that contains about 18 million objects (stars and galaxies).
直到目前，对于CCD观测者唯一合适可用的星表是GSC(哈勃空间望远镜的引导星参考星表)，它包含1.8亿个目标(恒星和星系)。
Until quite recently, the only useable catalogue for CCD observers was the Hubble Space Telescope's Guide star catalogue (GSC), that contains about 18 million objects (stars and galaxies).
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