49 
1892-93.] Dr D. Gill on the Minor Planet Victoria. 
period, having its maximum and minimum corresponding with the 
epochs when the moon’s longitude differed 90° from that of the 
planet. But if Leverrier’s value of the lunar equation (6"‘50), which 
was employed in the computation of the ephemeris, be reduced to 
(6" *40), the corrected ephemeris gives the following very small 
residuals when compared with the observations : — 
Group. 
Aa. 
C-0. 
Ad. 
C-0. 
II. 
-0' 
'•01 
+ 0' 
o 
o 
III. 
+ 
•04 
+ 
•02 
IV. 
- 
•02 
- 
•07 
Y. 
- 
•13 
+ 
•03 
YI. 
+ 
•09 
+ 
•04 
YII. 
+ 
•07 
+ 
•12 
YIII. 
- 
•05 
+ 
•09 
IX. 
- 
•03 
- 
•03 
X. 
- 
•07 
+ 
•02 
XI. 
+ 
•01 
- 
•12 
XII. 
+ 
•11 
- 
•04 
XIII. 
- 
•05 
•00 
XIY. 
+ 
•04 
+ 
•06 
XY. 
- 
•04 
+ 
•01 
This correction of - 0"T to the lunar equation results both from 
the right ascensions and from the declinations, and from each of the 
three lunations over which the observations extend, and points to 
the probable necessity for diminishing the presently accepted value 
of the moon’s mass by nearly 1 per cent. 
VOL. XX. 
14/4/93 
D 
