( 478 ) 



13. A second set of elements was derived by making the 

 plausible assumption, that the first miniinnm in Argei,anukr's 

 curve occurs 0.08 days earlier. We thus get rid of the greater part 

 of the dissymmetry. The second theoretical minimum is assumed to 

 coincide with the observed minimum. The interval between the two 

 minima thus becomes just half the period (6'^^375 -|- 0'^'.08 = 6^.455). 

 As a consequence the orbit must be either circular or elliptic with 



