distances and positions of 380 double and triple stars , &c. 343 
« Aquilae continued. 
The measures of this star in order of time are, 
1781.83; Position 64° 44' rap; Distance 2 / 23 // .3; H. Catal. of 1785. 
1819.71; 57 8 np; 2 19 .1 ; Struve, Additam. 196. 
1821.85; Position 56° 6 np-, 2 33 .71; Struve, Dorpat Obs. iii. vide 
Zach viii. 524, &c. from 
A decl. = 127". 58, 10 Obs. 
1823. 11; 55 48 np-, 2 33 .375; H and S. Mean result. 
As it is not possible to commit an error of 8° in the po- 
sition of a star at the distance of 2'i, the relative motion of 
these stars is past a doubt. The proper motion of a is not 
sufficient to account for it, for this is such as would alone 
carry it almost directly towards the small star with a ve- 
locity of o".(>34 per annum. Were the small star at rest 
then, the large one should have approached it by 2 6". 63, 
with a variation of the angle of position of not more than 
two or three degrees, and that in a contrary direction to 
what has actually happened. To account for the phas- 
nomena, if the proper motion assigned to a. be correct, the 
small star must have a motion nearly in the same direction 
as a, and somewhat more rapid. 
No. CCCIX. R. A. i9 h 45 m ; Decl. 8° 42' S 
57 Aquilas; IV. 14 ; Struve, 646. 
Both bluish ; 6 and 6| magnitudes. 
Position. 
O O / 
90 — 9.24 
8.50 
8.57 ys 
8.57 
9 - 5 . 
Mean 
9 - 3 
July 24, 1823. 
Five-feet Equatorial. 
*f 
Position = 8 o°57 ' sf 
Distance = 35" -997- 
z = — . 
>s 
Distance. 
Parts. 
1 14. 4“ 
1 1 6. 8 
1 14. 6 
1 1 6. 5 
M S- 8 _ 
1 15.62 
1.64 
113.98 
