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similar orbit
相关语句
  相似轨道
     The Similar Orbit of [z+w] in Fock Space
     Fock空间中一类拟不变子空间的相似轨道
短句来源
  相似匹配句对
     It is similar to C.
     本种在体态上与疏花虾脊兰C .
短句来源
     The Similar Orbit of [z+w] in Fock Space
     Fock空间中一类拟不变子空间的相似轨道
短句来源
     3 were similar.
     3例以上差异表达的基因共有96条,其中77条是已知基因。
短句来源
     ORBIT OF LIGHT
     光的轨迹
短句来源
     On the Orbit Stability
     再谈轨道的稳定性
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  similar orbit
To overcome this, use can be made of the dense DORIS Doppler tracking for SPOT2 which is in a similar orbit to ERS-1.
      
This time binning approach groups together points having similar sun-satellite and view geometries, and similar orbit orientations.
      
This is possible because for some time after a breakup, the debris cloud of particles can remain grouped together in similar orbit planes.
      


Comets Tsuchinshan 1 and Tsuchinshan 2 were first observed at Purple Mountain Observatory in the beginning of 1965 within a short interval of ten days.They have very similar orbits(Table 1,Table 2,Fig.1).By the end of 1971,these comets were recovered on their return to perihelion.Starting from these orbital elements, we tried to find out what changes have happened to these orbits during a time interval of several centuries; whether this supposed“twin comets”have any genea- ]ogical relationship between...

Comets Tsuchinshan 1 and Tsuchinshan 2 were first observed at Purple Mountain Observatory in the beginning of 1965 within a short interval of ten days.They have very similar orbits(Table 1,Table 2,Fig.1).By the end of 1971,these comets were recovered on their return to perihelion.Starting from these orbital elements, we tried to find out what changes have happened to these orbits during a time interval of several centuries; whether this supposed“twin comets”have any genea- ]ogical relationship between them. The method of numerical integration we used takes into consideration the pertur- bations of eight major planets from Venus to Pluto,the mass of Mercury being added to that of the Sun.The initial values of planetary coordinate and velocity for the epoch to=2430000.5 are adopted from Sehubart and Stumpff,while the data for the comets are taken from Table 1 and Table 2,adjusted to the new epoch by ad- ding the effect of perturbations.The equations of motion have thus been integrated for a period of about 500 years(1694—2195). We plot three average orbits of each comet,demonstrating the evolutionary ten- dency(Fig.2,Fig.3).We are inclined to conclude that the similarity between the orbits of these two comets at present is merely a chance phenomenon.They star- ted with quite different orbits.The perturbations due to Jupiter happened to re- duce the differences of the orbital elements until they manifest themselves as twin comets.But this evolutionary effect will later on work the other way and magnify the differences.Here we notice that a few centuries is long enough for cometary orbits to undergo considerable evolutionary variation.The perturbations from the major planets are the determining factor.

彗星紫金山1和紫金山2是于1965年初相继被发现的,它们的轨道彼此间有不少相似之处.为了考查这一对似是“孪生的彗星”在动力演化过程中是否有什么关联,本文考虑了自金星至冥王星八大行星的摄动,计算研究了这两颗彗星大约500年期间(1694—2195)的轨道变化.计算结果表明:目前两者轨道的某些相似之处,只是在一定时期里的现象,它们是从原来大小颇不相同的轨道经木星摄动而演变的结果,以后也将有不同的变化.

 
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