( 480 ) 



excentricity on the course of the light-curve. We conclude that, from 

 the light-curves we can only infer that the orbit is nearly circular. 

 At all events there is no reason to assume an increase or decrease 

 of the, certainly very small, excentricity. A comparison of the elements 

 a and q might lead us to conjecture that the distance of the two 

 celestial bodies has diminished since the time of Argelander. The 



