12:44
00:45
12小时02分钟
正午时间：
18:44
距离：
151,698km
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日出时间=（24-昼长）/2
日落时间=日出时间+昼长
或：一天有24小时,包括白天和黑夜,夜长＝24-昼长。而凌晨0：00可以看作是黑夜的中点,日出时间＝夜长/2,日落时间＝24-日出时间。