and positions of 458 double and triple stars, &c. 279 
No. DCCLXXXII. continued. 
The star is a remarkable one ; and from its magnitude and 
situation in the heavens, not to be confounded with any other. 
The proper motions assigned to this star in Piazzi’s Cata- 
logue, account satisfactorily for the change observed. They 
are respectively o".o8 in R. A. and — o".29 in declination. 
These motions, in 44 years, would carry the large star 3 ". 5 
to the following, and 12". 8 to the south side of its place in 
1781, or, in a direction, making an angle of 74 0 sf with the 
parallel. Supposing then the small star fixed, the present 
angle of position and distance should be 47 0 nf and 22 // . 5 
instead of 48° 3' and 26".24 which observation makes them. 
If we consider the uncertainty which necessarily hangs about 
the earlier distance, depending as it does on a single mea- 
sure, and from the extreme minuteness of the small star, 
liable easily to an error of 2 or 3", it will be allowed that a 
more satisfactory verification of the proper motion of the 
one star, and the comparative fixity of the other, could 
hardly have been looked for. This, among other similar 
instances, will serve to show the advantage which may be 
taken of the measures of double stars in all researches 
relating to the proper motions of the stars. This star appears 
to be a fit object for the investigation of parallax. (H.) 
No. DCCLXXXIII. R. A. 21" 7“ ; Decl. 8° 2 3' S. 
Struve, 716 ; Hist. Csel. 197. 
Double ; 9th and 9 \ magnitudes. 
Passy ; September 23 , 1824 ; Seven-feet Equatorial. 
Distance = 5 ".167 | 5 Obs. | Diff. = o".88c). Extremely difficult. 
These stars scarcely bear any illumination. 
