
%0 Journal Article
%A Balfe, JD 
%T Moon Camera Values of ?T = ET? UT
%J Australian Journal of Physics
%D 1963/06/01
%V 16
%N 2
%P 279-281
%K 
%R https://doi.org/10.1071/PH630279
%U https://www.publish.csiro.au/paper/PH630279 
%X The ephemeris scale of time is based on the revolution of the Earth around the Sun. In 1956 the International Committee of Weights and Measures adopted a new definition of the second, the fundamental unit of time, in terms of ephemeris time. The second is the fraction 1/31556925· 9747 of the tropical year for 1900 January 0 at 12 hours, ephemeris time. 
