CELESTIAL MECHANICS: LEUSCHNER 



part of the perturbations of the second order and those of the third in 

 longitude and radius vector. The accuracy of V in 100 years is 

 extremely difficult to obtain. A first test is the comparison between 

 special and general perturbations in the longitude and radius vector. 

 He finds small deviations which probably are due to the computation 

 of the special perturbations. 



As a further test Osten gives the comparison with 16 normal places 

 1894-1918. The Jupiter mass is also included as an unknown. The 

 value 1 : 1047.49 is found. 1 : 1047.35 according to Newcomb is adopted. 

 Thus Elements K are found. The representation of the normals from 

 micrometer observations is V to +2" in the plane. 



X A. N. vol. 150, p. 431. 



2 A. N. vol. 151, p. 159. 



8 A. N. vol. 158, p. 271. 



4 A. N. vol. 170, p. 195. 



REFERENCES 



5 Astronomische Abhandlungen No. 

 15, 1908. 

 A. N. vol. 194, No. 4639, p. 113. 



7 A. N. vol. 199, p. 393. 



8 A. N. vol. 210, p. 129. 



TABLE 13. Elements (447) Valentine (1899 ES) 



Mean elements. 



