[重要] 美国天文学家发现木星第40颗卫星！

Jupiter's 40th Satellite

December 30, 2002 | Last Halloween, while making follow-up observations of known Jovian satellites with a 2.2-meter telescope atop Mauna Kea, Scott S. Sheppard (University of Hawaii) found yet another small member of the planet's extended family. According to IAU Circular 8035, which announced the discovery on December 23rd, S/2002 J1 has an estimated diameter of only 3 or 4 kilometers and a 748-day retrograde orbit inclined 163° to Jupiter's equator. This new find marks the 23rd Jovian satellite discovered by Sheppard and the planet's 40th overall.

估计新卫星( S/2002 J1 )直径3-4公里，这是Sheppard第23次发现木星新卫星，他使用夏威夷大学2.2米口径望远镜作出的发现。国际天文联合会12月18日在其第8035号通告中宣布了此项发现。

Discovery of the New Satellite

The new satellite was discovered on October 31, 2002 by Scott S. Sheppard from the Institute for Astronomy, University of Hawaii at the University of Hawaii 2.2 meter telescope while recovering previously discovered satellites of Jupiter. The satellite was formally announced by the International Astronomical Union on Circular No. 8035 on December 18, 2002.

图片说明：
The two discovery images of S/2002 J1 showing the motion of the satellite relative to background stars and galaxies.
两张S/2002 J1 的图片，显示出该卫星相对于恒星和星系背景在移动。

1
These figures show the discovery images of Jupiter satellite S/2002 J1 taken about 30 minutes apart on UT October 31, 2002. The motion of the satellite clearly stands out compared to the steady state background of stars and galaxies. The stars and galaxies appear slightly elongated because the telescope's motion was tracked near the rate of the satellite's motion. Jupiter is not in the field, but is a few degrees to the West of these images.

2

木卫越来越多了！一个庞大的卫星家族！

木星就是美国，目前有n个成员围绕其旋转。

木星说：1994年7月，有21架恐怖组织飞机对我发动恐怖袭击，所以我们要战争……（这就是为什么那么多彗星被改变了轨道）