土星卫星CCD定位观测的初步分析  

Preliminary Analysis on CCD Astrometry of Saturn's Satellites

作　　者：乔荣川[1] 沈凯先[1] 

机构地区：[1]中国科学院陕西天文台,中国科学院光学天文联合开放实验室

出　　处：《陕西天文台台刊》1996年第1期1-6,共6页Publications of The Shaanxi Astronomical Observatiory

基　　金：国家自然科学基金;中国科学院天文委员会基金

摘　　要：发表了１９９４年８月土星主要卫星ＣＣＤ观测的相对位置资料及其与理论值的比较分析。观测使用了开放实验室分山基地的１５６ｃｍ天体测量望远镜上的ＣＣＤ探测器．对观测资料的分析表明；Ｒｈｅａ和Ｄｉｏｎｅ相对于Ｔｉｔａｎ的位置精度为０．１２”。这相当于距离土星７００ｋｍ．土星卫星ＣＣＤ观测与最佳的照相观测比较，其位置精度相当。The major satellites of Saturn were observed with the CCD detecter equipted on the 1.56m astrometrical telescope at the Sheshan station of the united laboratory for optical astronomy during the period of 11 to 14, Aug., 1994. The preliminary analysis of these observations shows that the accuracy of inter-satellite positions of Rhea,Dione,related to Titan,is 0.12″,equivalent to a distance of about 700km from the Saturn.Therefore these observations are valuable to the investigation of the orbits of the Saturn's satellites.CCD chips are superior to photographic plates due to their high quantum efficiency and accuracy.Besides,the CCD observations and reduction are easier to be conducted,compared to the lengthy reduction process of photographic plates.Therefore CCD chips would quickly supersede photographic plates as a prefered medium for astrometry of planetary satellites,just as photography superseded visual micrometric methods in the 1960s.Our observing programme on the major satellites of Saturn and Uranus using the CCD detectors equiped on the 1.56 m telescope at Sheshan station or on the 1 m telescope at Yunnan station of the united laboratory for optical astronomy has been conducted since 1993.The investigation on improving the methods of CCD observation and data reduction to raise the accuracy further will be continued in outer to contribute more to the studies on the further improvements of the orbital elements and theories of the satellites of Saturn and Uranus

关 键 词：土星 卫星 天体测量 CCD 定位观测 

分 类 号：P185.5[天文地球—天文学] P185.18