1994年4月的SL9彗星观测

OBSERVATION ON COMET SL9 IN APRIL 1994

１９９４年４月１２日晨，我们对Ｓ９彗星进行了成功的观测．观测使用云南天文台一米望远镜和加了缩焦器的Ⅱ号ＣＣＤ系统．照相机像素为５１２×５１２，视场约７’×７’．在近两小时的不同时刻的四张照片中，观测到了彗星２１颗碎核中的主要部份及其运动．本文介绍了此次观测情况和资料处理，并给出对ＳＬ９各彗核的位置和亮度的测量结果．

In the early morning of 12 April 1994, we obtained a successful observation onComet Shoemaker-Levy 9 by means of a CCD camera which is attached to the 1meter telescope of Yunnan Observatory and has a view field of about 7'×7' .On thefour CCD images taken at different times during nearly two hours, most cometaryfragments and their motion has been observed. In this paper, the observation procedure and the data processing has been discussed. In addition, the measurement resultsof the fragment's locations and their magnitudes are given.