彗核

彗核的蒸发、寿命及非引力效应；

Vaporization , lifetime of the cometary nucleus and the non-gravitational effects ;

彗核，其中也包括我国的彗星研究情况。

The cometary nucleus , in which some studies of comets in a China are also mentioned .

利用北京天文台1996年4月-10月间的CCD测光资料，对海尔-波普彗星的彗核的光变、大小、质量等问题进行了分析和探讨：探测到彗核活动引起的亮度的增加。

We explore variability of light , size , mass of Hale-Bopp comet making use of the CCD photometry data obtained in April-October , 1996 , in Beijing Observatory and get results ;

在1986年3月哈雷彗星可能发生了彗核分裂

Possible Nucleus Splitting of Halley 's Comet in March , 1986

彗核的冰石胶结模型

An Icy - glue Model of Cometary Nuclei

两个彗核表面活动区域的纬度分别是30度和0度。

The latitudes of the two active sources are 0 and 30 degree , respectively .

第一张哈雷彗核图

A First Map of Halley 's Nucleus

二十一颗彗核撞击时间持续五天半。

The collision of 21 comet nuclei will last for five and a half days .

哈雷彗星的彗核分裂

The Splitting of Comet Halley 1986

彗星的彗核仍然非常明亮，因此不需藉助任何设备，用肉眼就可以看到。

The head of the comet remains quite bright and easily visible to even city observers without any optical aide .

尽管彗星在天空中显得光彩夺目，但彗核相对来说是较小的。

For all the fiery display it makes in the sky , the nucleus of a comet is relatively small .

模拟表明只用一个彗核和两个源就可以解释观测到的彗发结构，不需要加入双核等因素。

The coma morphology can be interpreted by the model with one nucleus and two active regions . The two-nuclei model is not necessary to be introduced .

最近的观测研究表明某些小行星可能是由彗星演变来的，而某些近地小行星可能来源于主带小行星和死亡的彗核。

Recent observations and studies indicate that some of asteroids have originally relation with comets and some of NEA originate probably form main-belt asteroids and extinct cometary nuclei .

在9月10&11日观测到了彗核的爆发。在这两天内彗发的星等分别增加了2.1和1.4等。

It is found that an outburst happened on 10-11 September 1996 . The magnitude of the inner coma region increased by 2.1 and 1.4 mag on these two days , respectively .

据紫金山天文台的天文专家介绍，这颗彗星的二十一颗彗核与木星碰撞时的速度高达每秒六十公里。

According to astronomy experts of the Zijin Mountain Astronomical Observatory , the speed at the time of collision between the 21 nuclei and Jupiter will be as high as 60 km / s.

同时发现在彗核附近有两个球状喷出物。根据喷出物的运动外推出爆发的初始时刻是1996年9月9日（9.5±0.2UT）。

Two globular ejecta were found near the nucleus of the comet on 10-11 September 1996 . By extrapolating backward from the ejecta , it is found that the initial time of the outburst was on 9 September ( 9.5 ± 0.2 UT ) .