178 
DOOLITTLE—ORBIT OF DOUBLE STAR J 518. 
[April 3- 
! 
Date. 6c. Prec. |\0c—pr.| 00. | 00—Oc 
° ° ° ieee ° 
1783.13 | 327.33 | +.0.58 | 326.75 | 326.7 | + 0.00 
1825.12 | 234.22 0.37 | 233.85 | 287 + 
1835.86 | 189.907 | 0.32 | 189.65 | 
1850.94 | 1€0.15 0.25 | 159.90 | 156.60 | — 3.30 
1851.06 | 160.00 0-25 | 159-75 | 159.96 | + v.21 
1851.49 | 159.45 0.24 | 159.21 | 155.10 | — 4,11 
1853.64 | 156.83 0.23 | 156.60 | 158.30 | + 1.70 
1854.79 | 155.47 0.23 | 155.24 | 155.30 | + 0.06 
1856.80 | 153.10 0.21 | 152.89 | 152.90 | + 0o.or 
2857.82 | 151.91 Q.2I | 151.70 | 153.00 | + 1.30 
1864.84 | 144.06 0.18 | 143.88 | 147.60 | + 3.72 
1865.89 | 142.85 0.17 | 142.68 | 143.95 | + 1.27 
1869.10 | 139.06 | + 0.15 | 138.91 | 140.40 | + 1.49 
1871.99 | 135.49 0.14 | 135-35 | 125 + | —10.35 
3872.56 | 134.80 0.14 | 134.66 | 140.65 | + 5-99 
1873.99 | 132.29 0.13 | 132.76 | 133.90 | + 1.14 
1874.10 | 132.74 0.13 | .132.6x | 135.70 | + 3.09 
1875.14 | 131.31 0.12 | 131.19 | 138.10 | + 6.91 
1876.11 | 129.89 0.12 | 129.77 | 130.50 | + 0.73 
1877.12 | 128.41 0.11 | 128.30 | 120 + | — 8 30 
1877.84 | 127.36 0.11 | 127.25 | 127.5 | + 0.2 
1877.84 | 127.36 0.11 | 127.25 | 128.24 | + 1.0% 
1877.95 | 127.19 0.1% | 127.08 | 126.45 | — 0.63 
1878.14 | 126.89 0.11 | 126.78 | 125.50 | — 1.28 
1879.05 | 125.44 0.10 | 125.34 | 125.38 | + 0.04 
1879.18 | 125.22 0.10 | 125.12 | 125.00 | — 9.12 
1879.75 | 124.25 0.10 | 124.15 | 120.00 | — 4.15 
1880.09 | 123.67 0.10 | 123.57 | 121.30 | — 2.27 
1880.95 | 122.19 0.09 | 122.10 | 122.06 | — 0.04 
1881.84 | 120.67 0.09 | 120.58 | 119,co | — 1.58 
1882.12 | 120.15 0.09 | 120.06 | 118 r5 | — 1.91 
1883.00 | 118.48 0.08 | 118.40 | 119.20 | + 0.80 
1883.81 | 116.89 0.08 | 116.81 | 115.80 | — 1.01 
1884.16 | 116,27 0.08 | 116.13 | 118 20 | + 2.07 
1886.00 | 112.13 0.07 | 112.06 | 112.15 | + 0.09 
1886.09 | 111.94 0.07 | 111.87 | 112.23 | + 0.36 
1886.92 | 110.10 0.07 | 110.03 | 111 03 | + 1.00 
1887.14 | 109.61 0.06 | 109.55 | 1cg.18 | — 0.37 
1888.08 | 107.43 0.c6 | 107.37 | 109.48 | + 2.11 
1888.12 | 107.32 0.c6 | 107.26 | 107.68 | + 0.42 
1888.84 | 105.52 0.06 | 105.46 | 106 83 | + 1.37 
1888.87 | 105.45 0.06 | 105.39 | 105.05 | — 0.34 
1889.03 | 105.05 0.05 | 105.00 | 107.59 | + 2.59 
1889.12 | 104.82 0.05 | 104.77 | 103.55 | — 1.22 
1890.73 | 100.39 0.05 | 100.34 99-95 | — 1.39 
1890.98 99-70 0.05 99-65 99.00 | — 0.65 
1891.01 99.62 0.04 99-58 | 101.49 | + 1.91 
1891.06 | 99.49 0.04 99-45 98 56 | — 0.89 
1891.78 97-40 0.04 99.36 97-38 | — 1.98 
1893.21 | 93.10 0.04 93.06 93-8 | + 0.70 
1895.89 84.17 0.02 84.15 83.65 | — 0.50 
1895.91 84.14 0.02 84.12 87.4 + 2.30 
1897.97 76.73 0.01 76.72 77.22 | + 0.50 
1899.11 72.49 0.00 72.49 73.6 | + 1.10 
1899.80 | 69.50 0,00 69.50 | 68.35 | — 1.15 
1900.92 65.61 0.00 65.61 63.41 | — 2.20 
T9GFI4||' 157.49 |e O 62 57-21 55.22 | — 1.99 
Oo CO CO 
N CO.\O 
DaAAD B32 r 
Anwp 
OHOKH BOhana a 
COHQD Nw Onn 
- 
po. po—pc. 
“ “be 
4 to 8 
3.06 a“l 
eats — 0.02 
3.87 — 0.14 
3-93 — 0.16 
4-13 — 0.02 
4.51 + 0.29 
4.40 + 0.18 
4.45 + 0.19 
4.26 + 003 
4.46 + 0.32 
2+ |— 1.99 
4.602 + .65 
4.27 + .38 
4.39 i SE 
3.80 — .02 
4,01 ap dé 
ara || oles) 
3.36 — .28 
+e + .28 
394° |) aR iar 
4.36 + .74 
SEM aes SH 
3-52 = oS 
3-29 gene’ 
3.28 — .20 
3.16 — .26 
B53 7) tie 28 
3-25 — 08 
3.07 — 20 
3-10 — chs 
3-74 + .56 
3-22 + 0.18 
3.00 — 0.03 
3.01 + 0.04 
2.56 — 0.39 
2.26 — 0.62 
3.04 + 0.16 
2.94 + 0.12 
2.81 — 0.01 
2.87 + 0.06 
2.79 — 0.02 
2.68 —"G.02 
1.72 — 0.96 
2.62 — 0.06 
2.65 — 0.02 
2.48 — 0.05 
2.18 — 0.37 
2.32 —o.11 
2.62 + 0.26 
2.39 + 0,06 
2.30 — 0.02 
sil 
MN Rw OO 
[s) 
| 
n.| Observer. 
HN HH HW 
nm 
baa) 
fale 
s 
4 
HH HW D 
= Ceeee 
5 
Pann 
necke 
ROS 
~] 
PANN NINH 
ow 
eo 
SOOO O 
HH we oe 
ec 
p 
5 
B 
p 
Lf 
° 
a] 
> HP OW 
m POOwO 
UT ss) 
WHC 
p 
fey 
Aum HN 
wim OD 
Ss 
NHNWNDN 
x! 
= ate 
= 
Leavenw’th 
Hall 
Tarrant 
Schiaparelli 
Schiaparelli 
Hall 
B. 
‘Tarrant 
Schiaparelli 
Hall 
B. 
Hough 
Schiaparelli 
Hall 
HO OW 
HARUONW BA 
oo 
Comstock 
Doberck # 
Collins 
Aitkin 6 
Aitkin 
Doolittle 
WNW HH 
Doolittle 
4| Doolittle 
nn 
1<* A very vague estimate’ (O. S.). 
2“ No trace of duplicity.” 
3 This is a rough estimate merely ; Knott used a 734-inch. 
4 «Nearly invisible.”’ 
5 12-inch. 
‘ 
F 
4 
‘ 
‘ 
‘ 
