CHAPTER IX.—S CYGNI. 
125 
Table 76.— 7220 S Cygni. Visual Observations op the Variable. 
Date. 
Ocular. 
Aperture. 
No. 
Month 
and Day. 
Hour 
C. S. T. 
Julian 
Day 
G. M . T. 
1892 
2410000+ 
1 
Dec. 14 
9 
2447.63 
60 
6 
1893 
2 
Jan. 7 
7 
2471.52 
. . . 
6 
3 
July 2 
10 
2647.67 
6 
4 
3 
10 
2648.67 
6 
5 
Aug. 3 
9 
2679.63 
6 
6 
11 
9 
2683.61 
6 
7 
17 
10 
2689.66 
150 
6 
8 
Sept. 4 
8 
2711.58 
150 
6 
9 
6 
9 
2713.60 
150 
6 
10 
13 
8 
2720.58 
150 
6 
11 
26 
8 
273358 
150 
6 
12 
Oct. 4 
8 
2741.56 
40 
6 
r 
40 
6 
13 
10 
8 
2737-56 ( 
150 
6 
14 
21 
7 
2758.52 
40 
6 
15 
29 
6 
2766.50 
150 
6 
16 
Nov. 3 
7 
277 i- 5 i 
150 
6 
17 
6 
8 
2774.60 
r 
150 
6 
40 
18 
9 
6 
2777-52 <, 
150 
6 
10 
1 -3 
19 
14 
8 
2782.56 
. . . 
6 
20 
16 
7 
2784-54 
150 
6 
21 
20 
7 
2788.54 
150 
6 
22 
25 
6 
2793-50 
150 
6 
23 
29 
6 
2797-51 
150 
6 
24 
Dec. 1 
8 
2799.58 
150 
6 
25 
3 
7 
2801.54 
150 
6 
26 
5 
6 
2803.51 
150 
6 
27 
8 
6 
2806.50 
150 
6 
28 
12 
6 
2810.49 
150 
6 
29 
17 
7 
2815-55 
150 
6 
30 
28 
7 
2826.54 
150 
6 
1894 
3 i 
Jan. 10 
7 
2839.52 
6 
32 
June 6 
10 
2986.67 
150 
6 
33 
20 
10 
3000.67 
150 
6 
34 
24 
10 
3004.67 
150 
6 
35 
28 
10 
3008.67 
150 
6 
36 
July 2 
10 
3012.67 
150 
6 
37 
8 
9 
3018.63 
150 
6 
38 
23 
10 
3033 ■ 6 7 
6 
39 
29 
9 
3039-63 
150 
6 
40 
Aug. 6 
9 
3047-63 
150 
6 
4 i 
8 
9 
3049 63 
150 
6 
42 
18 
9 
3059-63 
150 
6 
43 
20 
9 
3061.63 
150 
6 
Comparisons. 
v\ to i M fainter than d 
^nuyv, V2l, limit p .^ 
\n2rn, dy, e4f, gif, f 3 h. .) 
v not seen, p easy. 
v not seen, p easy. 
(« 2 /. gi f, isK hk, kii —) 
J z»not seen,036,62c, cid,d2e > 
(_ho,p not seen, mandn—j) 
v not seen, o easy, limit p . . 
v not seen, pe asy, <7 glimpsed 
p2~2,v, vx, limit v . 
p 2 V, xv . 
p 2 V, vix . 
Vp, OlV, V 2 X . 
vip, liv, l2p, 0 not seen. . .. 
Jg 2 t,fih,hk .'j 
(046, 63c, C 2 d, d 2 e,eif,e\g I 
{n2o, pn, p^-sq, limit q. . }- 
< fi,h, h2k, k 21 , hm, min.. | 
(p/, or vil, kiv, V2m .. . . J 
f 2 V, V 2 h . . 
fiv, V 2 h . 
f 4 ~ 5 ' v > V 2 h . 
f^V, V 2 h . 
(046, bic, C 2 d,d 2 e,e 4 f,gif,'} 
<f 4 h, hik, hk, kim, «2», | 
(n20, oip, limit p .j 
(poor pio, 02q, limit q, r } 
'.not seen.j 
(fiV,Vlh,V 2 k,V 2 ~il . j 
aib, b2c,c\d, d-je, limit e. J 
f vh or vk, fiv, vi-2 1 . 
\}iv, hiv, vk, vil . 
f4v, vih, vik, V2 1 . 
vil, vk, hiv . 
vl, kiv, I12V, vim . 
vl, k 2 V, h- 2 — iv, V 2 VI . 
vl, kiv, v2m . 
lo-iv, kiv, ll 2 V, V 2 m . 
ll~ 2 V, V 2 m . 
hv, miv, vio, limit 1-2 < q 
h~iv, miv, vio . 
/3-41/, mi~2v, vi-20 . 
vx — limit. 
x seen, v not seen. 
v not seen, limit x . 
v not seen, limit 2 < x.... 
v glimpsed, 022-37;. 
v glimpsed, xiv . 
v not held, limit 2 < x, X 2 y 
X2v, vy, uncertain. 
* 27 ;, yiv, limit v . 
xo-iv, vi- 2 y . 
4-57;, V 2 ~iX . 
l$V, V2X . 
hv, vi-20 . 
hv, V2 -30. 
Reduction, Steps. 
21.1, 27.7 
19 - 3 . 19 o. 
19.8, 19.0. 
19.8, 20.0. 
21.8, 21.0, 21.0 
22.8, 24.7. 
26.2, 27.7, 26. 1, 
30.1, 30.6 
29.1, 30.6 
27.6, 30.6 
28.1, 30.6 
29.1, 29.6, 30.7,28.2 
28.6, 28.7, 29.1, 27.2 
29. r, 27.6, 28.7, 26.7 
28.1, 29.6, 29.7, 27.7 
26.7, 28.7, 27.6. 
25- 7 , 27.7, 26.6, 27.1 
25-7* 26.7, 26. r, 26.1 
25-7, 27.7, 26.1. 
25.2, 27.7, 26.6, 26.1 
24.2, 26.1. 
23.7, 23.1, 25.0.. . . 
23.2, 23.1, 25.0. 
22.2, 22.6, 23.5. 
17 
0, 
16.4.. 
17 
0, 
I 5 - 4 -- 
18 
5 , 
17.9.. 
21 
2, 
21.5. 
20 
7 . 
21 .O. . 
23 
7 , 
23 - 5 - 
23 
7 , 
24 - 5 - 
Means. 
Seeing 
Steps. 
Mag. 
• 
9 
•5 
poor 
23 
9 
11 
.06 
< 22 
>11 
•5 
.... 
< 22 
<n 
•5 
<11 
■5 
good 
<22 
<11 
■5 
< 12 
.... 
19 
2 
11 
92 
fair 
19 
•4 
11 
•89 
.... 
19 
•9 
11 
. 80 
21 
•3 
11 
•52 
.... 
23 
.8 
11 
• 27 
.... 
26 
7 
10 
•63 
fine 
30 
4 
10 
•03 
good 
29 
8 
10 
• H 
good 
29 
1 
10 
•23 
good 
29 
•4 
10 
•19 
fine 
29 
4 
10 
19 
fair 
l 28 
2 
10 
40 
fair 
28 
8 
10 
30 
moon 
27 
7 
10 
46 
moon 
26 
8 
10 
60 
fair 
26 
2 
10 
70 
good 
26 
5 
10 
65 
poor 
26 
4 
10 
66 
fine 
25 
2 
10 
88 
fine 
23 
9 
1 r 
08 
good 
23 
8 
11 
10 
good 
22 
8 
11 
27 
good 
19 - 
0 
ri 
95 
fair 
<19 
<12. 
0 
fair 
<19 
<12. 
0 
good 
<17 
< 12 
3 
fine 
16. 
5 
12 . 
38 
good 
16. 
0 
12 . 
48 
good 
< 17 - 
0 
< 12 . 
3 
good 
16. 
7 
12 . 
35 
good 
16. 
2 
12 . 
46 
fair 
18. 
2 
12 . 
10 
good 
21. 
3 
I I . 
51 
good 
20. 
8 
I I . 
61 
fair 
23 - 
6 
I I . 
13 
fair 
24. 
I 
I I 
05 
fair 
t. 
J Mag. 
0 
-0.74 
24 
+ 0.31 
200 
201 
264 
+ 0.19 
266 
+ 0.19 
2 73 
+ 0. 28 
286 
+ 0.36 
294 
+ 0.31 
300 
— 0.02 
3 11 
— 0. 28 
3 i 9 
— 0.08 
324 
+ 0.01 
0 
-0.05 
3 
— 0.09 
8 
+ 0.07 
10 
— 0.07 
14 
0.00 
19 
0.00 
23 
— 0.02 
25 
-0. 15 
27 
— 0.21 
29 
-0.05 
32 
+ 0.03 
36 
— 0.19 
4 i 
-0.25 
52 
— 0.14 
230 
— 0.19 
234 
+ 0.03 
244 
+ 0.18 
259 
+ 0.63 
265 
+ 0.39 
273 
— 002 
275 
+ 0. rr 
285 
— 0.12 
287. 
+ 0.14 
