Gore — A Catalogue of Binary Stars, 8^c. 581 
AB. 
1884-17 
: 62°-85 
0"-985,Perrotm. 
1884-28 
: 67 -0 
0 .94, Engelmann. 
1885-29 
: 59-4 
: 1 
•05, 
1886-08 
: 57 -18 
: 1 
•09, Tarrant. 
1886-30 
: 56 -4 
. 1 
•08, Engelmann. 
1888-27 
43 -7 : 
1 
•04, Schiaparelli. 
1889-19 
40 -3 : 
1 
05, Leavenworth 
i (A + E) and C. 
1882-26 
130°-0 : 
5"-46, Schiaparelli. 
1885-29 
126 -8 , 
5 
•44, Engelmann. 
1886-080 
125 -71 
5 
-48, Tarrant. 
1886-30 
127 -2 
5 
•35, Engelmann. 
AC 
1889-18 
: 119°-3 
b" 
•65, Leavenworth. 
BC. 
1889-19 
128°-5 
b" 
•43, 
1 6. Struve, 3121. More than a revolution has been completed since 
its discovery by Struve in 1830. Celoria's orbit is, perhaps, the best. 
The object is, however, close and difficult to measure ; and some of the 
recorded measures are very discordant. 
Some recent measures are : — 
1882^25 : 194°'8 : 0"^305, Engelmann. 
1882^31 : 205 -84 : 0 -45, Schiaparelli. 
1883-22 : 221 -2 : 0 -387, Engelmann. 
17. CO Leonis = Struve, 1356. Doberck's second orbit is probably 
the best. A complete revolution has nearly been described since its 
discovery by Sir "W. Herschel in 1781. 
Some recent measures are : — 
1885-17 
93^ 
^•30 
: — Doberck. 
1885-27 
90 
-6 
0"-72, Engelmann. 
1885-307 
93 
-96 
0 -69, Tarrant. 
1886-32 
92 
•2 
0 ^73, Engelmann. 
1888-27 
98 
•5 
0 ^68, Schiaparelli. 
1888-57 
95 
•8 
0 -71, Leavenworth. 
Measures by Dr. Doberck, from 1876 to 1885, will be found in 
the Transactions of the Eoyal Irish Academy, vol. xxix., part xiii. 
(1890). 
