456 RECTIFICATIONS AND ADDITIONS. 



r Yirginis . . 3"-446 0-8699 153-787 

 Cancri. . . 0"-934 0-3662 58-590 

 a Centauri . . 12"'128 0-7187 78-486 



I have termed the occultation of one fixed star by another, 

 (in the case of Herculis), " apparent" (p. 212). Mons. 

 Faye shows that it is a consequence of the factitious diameter 

 of stars as seen in our telescopes (Kosmos, Bd. iii. S. 67 

 und 167 ; Engl. ed. p. 50 and 110). The parallax of 1830 

 Groombridge, which I have given in S. 275 (Engl. ed. 

 p. 190) at 0"-226, has been found by Schliiter and "Wichmann 

 at 0"-182, and by Otto Struve at 0"-034. 



Page 371. 



It was not until the section upon the small planets had 

 been printed off that we received in the North of Germany 

 the information of the discovery of a fifteenth small planet, 

 Eunomia, by De Gasparis, on the 1 9th of July, 1851. The 

 elements of Eunomia, computed by G. E/iimker, are : 



Epoch of mean longitude . { 



Mean longitude ..... 321 25' 29" 



Longitude of perihelion . . 27 35 38 



Longitude of ascending node . 293 52 55 



Inclination ...... 11 43 43 



Excentricity ..... 0-188402 



Semi-major axis . . . .. ; . :: 2-64758 



Mean diurnal motion . V /. 823"*630 



Period of revolution .' . . 1574 days. 



