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彗星轨道
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  comet orbits
     This paper briefly introduces the recent situation in the statistics of comet orbits research as well as its use in the study of comet origin.
     本文介绍了近年来彗星轨道统计研究的概况,以及它在彗星起源研究中的应用。
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  “彗星轨道”译为未确定词的双语例句
     3. Their perihelion points are within 8°of each other.
     4.两彗星轨道的近日点几乎在同一方向(只差8°);
短句来源
     The author of this paper has worked out the statistics of perihelion and argument of perihelion based on the 1982 data of Marsden.
     其中,关于近日距、近日点的角矩的统计表是作者根据1982年由Marsden公布的彗星轨道表重新作出的。
短句来源
     Applying the results obtained in this paper to the motion of comets,discuss the nongravitational effect on the orbit of some comets.
     文中还将研究结果应用到彗星运动上 ,讨论彗星轨道中非引力效应。
短句来源
     Finally,also calculate nongravitational effect on the orbit of comet Encke.
     文末还具体计算了恩克彗星轨道中非引力效应
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  相似匹配句对
     THE ORBIT OF COMET TSUCHINSHAN 1977q
     紫金山彗星(1977q)的轨道
短句来源
     Track desigh
     轨道设计
短句来源
     EVOLUTION OF THE ORBITS OF COMETS TSUCHINSHAN 1 AND TSUCHINSHAN 2
     彗星紫金山1和紫金山2的轨道演变
短句来源
     AN INVESTIGATION ON THE ORBITAL MOTION OF AN ARTIFICIAL SATELLITE
     人造卫星的轨道问题
短句来源
     INTERACTIONS BETWEEN COMETARY PLASMAS AND THE SOLAR WIND
     彗星和太阳风的相互作用
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  comet orbits
An order of magnitude argument is given which shows that ~20% of so-called 'new' comets have passed through the planetary system before, and the implications of this to the statistics of near-parabolic comet orbits are briefly investigated.
      
Only the tidal torque of the Galaxy is included as a perturbation of comet orbits and it is approximated to be that due to a quasi-steady state distribution of matter with disk-like symmetry.
      
Additionally, we also continue to this restricted problem the so called "comet orbits".
      
The effect of galactic perturbations on long-period comet orbits is examined via numerical and analytical means.
      
Thus the galactic field is an important factor in the evolution of long-period comet orbits.
      
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  comet orbit
All that can be said about the Tunguska comet orbit is that it has to be retrograde as it was viewed in the early morning hours.
      


These two comets were discovered on plates taken for photographic observation of asteroids during the first decade of January 1965. The instrument used is a double astrograph, with aperture 40 cm and focal length 300 cm. With eight observations of each comet made since the discovery up to March 4, 1965, orbits were computed and improved. The orbital elements as well as the difference between the observed and computed positions are given in Tables 1 and 2. As the angles of inclination of the planes of these orbits...

These two comets were discovered on plates taken for photographic observation of asteroids during the first decade of January 1965. The instrument used is a double astrograph, with aperture 40 cm and focal length 300 cm. With eight observations of each comet made since the discovery up to March 4, 1965, orbits were computed and improved. The orbital elements as well as the difference between the observed and computed positions are given in Tables 1 and 2. As the angles of inclination of the planes of these orbits to the ecliptic are rather small, these orbits have been plotted on the plane of the ecliptic in the accompanying figure together with those of Jupiter and the earth. Regarding these cometary orbits, the following facts are worthy of special notice: 1. Both are short-period comets with nearly equal periods (6.6—6.8 years). 2. Their inclinations to the ecliptic are small (less than 11°). The lines of nodes of these cometary orbits and that of Jupiter are nearly collinear (within 11°). 3. Their perihelion points are within 8°of each other. 4. Their aphelion points are just a little outside of Jupiter's orbit. At the end of 1960, comet Tsuchinshan 1 had a close approach to Jupiter (about 0.17 A.U.). Comet Tsuchinshan 2 came within 0.48 A.U. from Jupiter at the end of 1961.

首先将这两颗彗星和它们轨道的一些特点,综合叙述如下: 1.它们是在1965年一月份前后只隔十天相继发现的; 2.它们都是短周期彗星,周期在6.6到6.8年之间; 3.它们轨道平面和黄道面的倾角都不大(小于11°)。两条交点线彼此接近(其间成11°的角),而且都与木星轨道平面和黄道面的交线接近(相差不到8°); 4.两彗星轨道的近日点几乎在同一方向(只差8°); 5.这两轨道的远日点,都只略为超出木星轨道一些。在1960年12月,彗星紫金山1与木星接近到0.17天文单位。在1961年12月,彗星紫金山2与木星接近到0.48天文单位。

Comet Tsuchinshan (1977q) was discovered at Purple Mountain Observatory on Nov. 3, 1977. The osculating orbital elements (referred to the barycenter of the sun and Mercury) given in table 1 are derived from 42 observations Nov. 3, 1977 to Jan. 10, 1978 at our observatory and abroad, taking into account the perturbations of all major planets. In all the observations the rms residual is 1."78. Our observations are also published in table 2. With the elements thus obtained, the appropriate ephe-merides in recent...

Comet Tsuchinshan (1977q) was discovered at Purple Mountain Observatory on Nov. 3, 1977. The osculating orbital elements (referred to the barycenter of the sun and Mercury) given in table 1 are derived from 42 observations Nov. 3, 1977 to Jan. 10, 1978 at our observatory and abroad, taking into account the perturbations of all major planets. In all the observations the rms residual is 1."78. Our observations are also published in table 2. With the elements thus obtained, the appropriate ephe-merides in recent years have been calculated and listed in table 4. And then, in consideration of accurate perturbations, we compute the original and future orbits (referred to the center of mass of solar system) while the comet is about 60 A. U. from the Sun. The results that both the original and future orbits are hyperbolicaare given in table 5 and may be compared with the osculating elements. Nevertheless, the two months observed interval for determining orbit is short. In order to obtain the more reliable conclusion, it is necessary to make some efforts for increasing the obser-ved arc.

1977年11月3日紫金山天文台发现一颗新彗星,定名为紫金山彗星(1977q)。本文收集了国内外共42次观测资料,精确计算了这颗彗星的轨道,轨道为近于抛物线的双曲线,逆向运行。1977年7月24日过近日点。文中给出了近年观测历表。最后,考虑全部大行星的准确摄动,计算研究了当此彗星处于日心距约为60天文单位时原始的和将来的轨道。

This paper briefly introduces the recent situation in the statistics of comet orbits research as well as its use in the study of comet origin. The author of this paper has worked out the statistics of perihelion and argument of perihelion based on the 1982 data of Marsden.

本文介绍了近年来彗星轨道统计研究的概况,以及它在彗星起源研究中的应用。其中,关于近日距、近日点的角矩的统计表是作者根据1982年由Marsden公布的彗星轨道表重新作出的。

 
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