土星卫星的天文底片数字化和位置测量  

Digitization and Position Measurement of Astronomical Plates of Saturnian Satellites

作　　者：严丹[1,2] 于涌[3] 张会彦[1,2] 乔荣川[1,4] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049 [3]中国科学院上海天文台,上海200030 [4]中国科学院精密导航定位与定时技术重点实验室,西安710600

出　　处：《天文学报》2014年第3期228-236,共9页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(11173027);国家科技部重点项目(2012FY120500)资助

摘　　要：在天文底片数字化工作中,利用高端商用扫描仪可能是一条简单而有效的途径.针对1988年云南天文台1m RCC(Ritchey Chretien Coude)望远镜拍摄的6张土星卫星天文底片,探讨了利用Epson公司10000XL商用扫描仪的底片数字化技术和数据处理方法.基于底片数字化图像和UCAC2(The Second US Naval Observatory CCD Astrograph Catalog)参考星表,重新测量土星卫星的位置.通过与IMCCE(Institut de Mecanique Celeste et de Calcul des Ephemerides)提供的土卫历表位置比较表明,土星卫星的定位结果在赤经和赤纬方向上的残差均值分别为0.056″和0.009″,在赤经和赤纬方向上残差的标准偏差分别为0.106″和0.089″.Using the advanced commercial scanners to digitize astronomical plates may be a simple and effective way.In this paper,we discuss the method of digitizing and astrometrically reducing six astronomical plates of Saturnian satellites,which were taken from the 1 m RCC（Ritchey Chretien Coude） telescope of Yunnan Observatory in 1988,by using the 10000 XL scanner of Epson.The digitized images of the astronomical plates of Saturnian satellites are re-reduced,and the positions of Saturnian satellites based on the UCAC2（The Second US Naval Observatory CCD Astrograph Catalog） catalogue are given.A comparison of our measured positions with the IMCCE（Institut de Mecanique Celeste et de Calcul des Ephemerides） ephemeris of Saturnian satellites shows the high quality of our measurements,which have an accuracy of 106 mas in right ascension and 89 mas in declination.Moreover,our measurements appear to be consistent with this ephemeris within only about 56 mas in right ascension and 9 mas in declination.

关 键 词：天体测量学 技术:图像处理 行星和卫星:个别:土星 

分 类 号：P123[天文地球—天体测量]