CATALOGUE OF POLAR STARS- 



2S7 



d 



a 



1875 



1879 

 1 883 



18s 



i 



1891 

 1895 

 1899 



h. m. $. 



7 29 5.G31 



7 33 57.248 



7 38 43.910 



7 43 25.517 



7 48 



1 . 992 



7 52 33.281 

 7 50 59.347 



dt 



9. 



+ 73.514324 

 + 72.289406 

 + 71.037178 

 + 69.762(527 

 + 68.470504 

 + 67.165522 

 + 65.851860 



8 



+ 88 59 



+ 88 56 



// 



+ 88 59 37.G9 



6.50 



+ 88 58 88.76 



+ 88 57 59.52 



+ 88 57 23.81 



+ 88 56 46.1 



8.17 



'1 



<tt 



// 



i 



.6(11 

 7.99:; 

 8.37- 5 



8.746 



9.107 



9.458 

 9.798 



We now compute the values of a for the years 1883 to 1899 by formula (54) 



For 1875 



.«?. 



P 



+ 73.514324 



1879 4 jo. = +289.157864 



1883 



P 



3 



P. 



a 



For 1883 



o 



« 



For 1 8 83 



1887 

 1891 



1\ 



+ 71.037178 



Sum +418.558190 



For 1S79 

 1SS3 



1887 



t. 



Pi 



P* 



+ 72.28!) 106 

 +284.148712 

 + 69.762627 



Sum +433.709366 





Sum +426.200805 



h. Tft. s. 



+ 72.284894 

 + 9 38.2791 



7 29 5.6310 

 7 38 43.9101 



SP S = 



a = 



For 1887 « = 



h. m. jr. 



+ 71.033168 



+ 9 28.2677 

 7 33 67.2480 



7 43 25.5157 



2\ = + 71.037178 

 p. 2 = + 279.050508 

 p., = + 68.470504 



For 1887 

 1891 

 1895 



p x = + 09.762627 



4 pi = + 273.882016 



ft = + 67.165522 



Sum +410.810165 



P. 



S P. 



a 



For 1891 



o 



« 



A 



m. 



s. 



+ 69.759698 

 + 9 18.0776 

 7 38 43.9101 

 7 48 1.9877 



P. 



8 7' 



a 





For 1895 « 



^. T)1. 8. 



+ 68.408361 

 + 9 7.7469 

 7 43 25.5157 



7 52 83.2626 



From this point the approximate values of - required for the computation 

 of the next and the following: dates can be found from the successive orders of 



differences of 



d 



n 



dt 



already found. Each result for a should be verified by a second 



dec! 



before proceeding to the next in order. The values of the pi 

 i vary so slowly that a second computation will not be necessary 





