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- 01/03/1981
- Field of study
No full text本文提出了一种研究星团自转的方法。根据它们自行和位置的资料,可以判别星团的成员、确定星团是否在自转或膨胀,或者既自转又澎胀,或者既不自转又不澎胀。若有视向速度的资料,还可以确定自转轴的方向。使用这个方法,我们计算了八星团一个星协,发现NGC 2548,1960 (M36)、2099(M37)、6795(M11)、毕星团和鬼星团都在自转着,MGC 1817和猎户星协既自转又膨胀,昂星团在膨胀着。本方法原则上也适用于星协和球状星团
- Publication venue
- Publication date
- 01/01/1980
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- 01/01/1985
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No full text
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- 01/01/1978
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- 01/01/1983
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- 01/01/1998
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- Publication date
- 01/01/1990
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No full text本文介绍了中国科学院上海天文台的第三代卫星激光测距系统的性能及三年来对LAGEOS,AJISAI和STARLETTE等卫星的实测结果.卫星轨道拟合和地面靶的测距试验均表明,本系统的卫星测距精度(均方差)约±5cm
- Publication venue
- 'Science China Press., Co. Ltd.'
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