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%I #18 Aug 05 2021 20:48:00
%S 0,0,0,0,0,4,8,4,8,1,3,6,8,1,1,0,9,5,3,5,9,9,3,5,8,9,9,1,4,1,0,2,3,5,
%T 7,9,4,7,9,7,5,9,5,6,3,5,3,3,0,2,3,7,2,7,0,1,5,1,5,5,8,2,5,5,3,1,7,7,
%U 8,2,5,2,8,0,3,0,9,6,1,2,0,6,9,2,8,9,9,1,1,7,3,3,7,6,9,3,4,2,9,1,9,3,0,0,6
%N Decimal expansion of the conversion factor of arcseconds to radians.
%C One arcsecond is a popular astronomic angular unit, 1/3600 of a degree.
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F A019685/3600.
%e Equals 4.8481368110953599358..*10^(-6).
%p evalf(Pi/180/3600);
%t Join[{0,0,0,0,0},RealDigits[Pi/648000,10,120][[1]]] (* _Harvey P. Dale_, Apr 04 2015 *)
%o (PARI) Pi/648000 \\ _Charles R Greathouse IV_, Sep 08 2011
%Y Cf. A217572 (inverse). - _Stanislav Sykora_, Feb 04 2014
%K cons,easy,nonn
%O 0,6
%A _R. J. Mathar_, Jan 31 2009
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