32 



The radius vector of J^eptune in the following table is rigorous. The logarithm of the distance from 

 the earth may be interpolated from the column for 1847 with sufficient precision for planetary aberration 

 and parallax, by recollecting that it returns very nearly to the same value in a synodic year of SBTi days. 



Month and day. 



Neptune's radios vector. 



Logarithm of dis- 

 tance from the earth. 



1846. 



1847 



1848. 



1849. 



1847. 



January 1 

 February 1 

 March 1 

 April 1 

 May 1 

 June 1 

 July 1 

 August 1 

 September 1 

 October 1 

 November 1 

 December 1 



30.01681 

 .01574 

 .01477 

 .01370 

 .01266 

 .01160 

 .01057 

 00951 

 .00845 

 .00742 

 .00636 

 .00534 



30.00430 

 .00325 

 .00230 

 .00126 

 30.00025 

 29.99919 

 .99818 

 .99715 

 .99614 

 99515 

 .99413 

 .99315 



29.99216 

 .99116 

 .99023 

 .98924 

 .98825 

 .98730 

 .98638 

 .98543 

 .98449 

 .98357 

 .98263 

 .98174 



29.98085 

 .97994 

 .97918 

 .97827 

 .97734 

 .97647 

 .97562 

 .97476 

 .97391 

 .97308 

 .97223 

 .97142 



1.48689 

 .49071 

 .49093 

 .48768 

 .48178 

 .47433 

 .46761 

 .46347 

 .46248 

 .46503 

 .47211 

 .47951 





1795 









1795. 



May 9 



30.30430 



- 



- 



- 



1.46724 



. 



