2018年IOAA日间观测第2题

英文题目

O2 (20 points) Figure 2 is a star chart of a recent opposition of Jupiter. The grid in the figure is the ecliptic coordinates. Please estimate the date of this opposition, to the nearest day.

中文题目

观测第二题（20分）

图2是最近木星冲日的星图。图中的网格是黄道坐标。请估计冲日的日期，精确到天。