What was the rotational velocity of Earth on Dec 31, 1899

  • #1
I ask because time is defined with reference to this day (the SI second is based on a caesium clock is calibrated with reference to the 1952 ephemeris time standard, which was based on a second being 1/86 400th of Jan 0, 1900 (with Jan 0 being Dec 31 of 1899).

So... how do I calculate the rotational velocity of Earth on that day?
 

Answers and Replies

  • #2
russ_watters
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Divide the length of the day by how far Earth rotated.

(hint: it isn't 360 degrees)
 
  • #3
Right- of course! that's embarrassing :-p - thanks!

360.9856° / 86400 s = 0.004178°/s or 15.041°/hr

Thank you Russ
 
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