The photometric observation of the asteroids is an important way to study their physical parameters . the rotation and shape parameters of the asteroids derived from the lightcurves are necessary data for the evolution studies of the solar system and theirselves 光電測光觀測是研究小行星物理參數(shù)的主要手段之一,由小行星自轉(zhuǎn)光變曲線推斷出的小行星的形狀和自轉(zhuǎn)參數(shù)是以上兩方面研究工作所必需的數(shù)據(jù)。
(3 ) we introduced the methods to estimate the shape and rotation of the asteroids with the lightcurves . with the improved newton iteration method, we propose a method to solve the problem on the convergence of the iteration when the initial value is far from the real solution 第三章著重闡述了小行星形狀和自轉(zhuǎn)參數(shù)的研究方法,針對目前人們最常用的綜合振幅和周期的方法所存在的問題??解的收斂問題,提出了一種解決的方法。
(4 ) before the presentation of results of our observations and analysis, the corrections for the ccd images and the methods to analyze the observational data were introduced . ( 5 ) in order to analyze the lightcurves of ( 469 ) with multi-periods, the theories about the precession of the asteroids and the eclipse of the binary asteroids were involved 因此,在第五章中,針對2002年所觀測的一顆非單一周期光變的小行星(469)的情況,嘗試利用小行星受迫進動或雙小行星運動理論,對(469)的光變曲線進行了解釋。
During its lifetime, the xd recorded a total of 664 triggers . the research team identified and recorded lightcurves of near one hundred solar flare events data taken during half of the orbit when the shenzhou-ii orbiter faces the sun and 30 candidates of gamma ray bursts . many of these observations were verified by similar results taken by other orbiting satellites 探測器在運作期間,共錄得664次撞擊,研究小組由此識別并記錄了近百次太陽耀斑的變光曲線當神舟二號在軌道上面向太陽時和約30次伽瑪射線爆發(fā),大部分觀測結(jié)果跟其他人造衛(wèi)星所測得的類似。