火星日

在火星上，时间1后跟时间2是恒星日的长度。时间1后跟时间3是太阳日或火星日的长度。

火星日 是火星上太阳日。一个火星日是在火星上的观测者观测到的，太阳两次到达相同的子午线的明显间隔时间。它是火星上的几个时间计量单位之一。

火星日比地球日稍长。大约需要24小时39分钟35秒。火星年大约是668火星日，相当于大约687地球日[1]或1.88地球年。

火星日最早是在1976年在维京号任务期间被采用，它是NASA在做某些任务时的时间计量单位，比如说安排火星探测车的使用中来描述时间。 [2] [3]

长度

在火星上一个昼夜循环的持续时间为24小时39分钟35.244秒，相当于1.02個地球日。

火星的恒星日（相对于固定恒星，自身旋转一周的时长），只有24小时37分钟22.66秒[3]。由于火星绕太阳的公转，火星的太阳日比恒星日稍长。

参考

  1. ^ Mars' Calendar. [2021-05-21]. （原始内容存档于2020-07-04）. 
  2. ^ Snyder, Conway W. The extended mission of Viking. Journal of Geophysical Research. 1979, 84 (B14): 7917–7933. doi:10.1029/JB084iB14p07917. 
  3. ^ 3.0 3.1 Allison, Michael. Technical Notes on Mars Solar Time as Adopted by the Mars24 Sunclock. Goddard Institute for Space Studies. National Aeronautics and Space Administration. 30 June 2015 [13 June 2018]. （原始内容存档于2019-09-04）. 

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