当前位置:[北京同好会]>[活动]>[2009年2月9日半影月食]

 

2009年2月9日元宵节.半影月食

2月9日是元宵佳节,恰好发生半影月食。

虽然目视不很明显,但在照片上还是容易看出变化。

(徐槐摄。FS102)

和每年一样,这次坊间又流传着某某年来最大的月亮之说。毛主席说,要想知道梨子的滋味,就要亲口尝一尝;要想知道月亮的大小,就要亲眼看一看。

架好经纬仪,实地测一测。

月亮在天上,望远镜却朝下指。这块镜子有年头了。早在上个世纪,王炎就置办下这个家伙什。此后在观看流星雨时,别人翘首以待,王炎却垂头做沉思状,实际上偷懒在看星空的倒影。

结果出来了,有惊人的发现。首席郑重宣布:“我很怀疑历史上有没有人曾经真正测量过月亮的大小......”

 

两百年之最之一网打尽

“之最”说每隔一段时间就会冒出来一次。干脆看一下前后100年的月相,以备不时之需。(均为地心坐标)

[非专家、非权威预报。如无差错,纯属巧合;如有疏漏,概不负责。]

望时月球视直径以大约410天的周期在变动,即14个朔望月,15个近点月。当前的变化周期里的极大根本就不在2009年内。


1900-2100 年每个周期内最大的月球望时视直径的变化,用于发布“N年最大”满月之用


1900-2100 年每个周期内最小的月球望时视直径的变化,用于发布“N年最小”满月之用


1900-2100 年每个周期内望时月球最圆位相差异,用于发布“N年最圆”满月之用


1900-2100 年每个周期内望时月球最不圆位相差异,用于发布“N年最不圆”满月之用


以上数据可以组合使用。例如发布:史上最圆的满月之后的最大的满月,等等。


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