Neil Webster, St Marys Platt, Kent
e-mail: ******@gmail.com
Introduction
The following measurements were made throughout 2018 using a Meade 12mm astrometric illuminated reticle eyepiece plus 2.5x powermate attached to an Altair Astro 115mm refractor (focal length 805mm, f7). The total magnification was 167.5x with a field of view of 0.3 degrees.
Fewer measurements were made this year due to relocation which finally happened at the end of February. Serious observing, measuring and imaging did not begin until the middle of April. Although St Marys Platt is a much darker site than Bromley measurements are still limited to 8.5 magnitude due to the red light in the eyepiece. However, a Southerly aspect is now available so many of the measurements are of systems previously unavailable.
All final separation values were calculated from a calibration determined by the timing/transit method (Simple Techniques of Measurement: E.T.H. Teague, Chapter 12 in Observing and Measuring Visual Double Stars ed. Argyle, pub. Springer).
Position Angle measurements were made using the now tried and tested method previously outlined in DSSC 25 which involves using the directional west arrow on the synscan handset to electronically steer the primary to the outer edge of the protractor scale rather than turning off the mount motor for an unaided drift.
As before, 10 separation and 10 position angle measurements (N = 20) were performed on the same evening for each pair and the final results and associated uncertainties calculated.
Extensive use was again made of the Astroplanner software. Separations throughout the year were all limited to a range from 15 to 100 arc-seconds. Magnitudes ranged from 0.5 to 8.5.
As most of these systems are comparatively wide the orbits are generally very long (2,000 years+) and very few have accurate orbital calculations. Residuals (from the online version of 6th USNO Catalogue of Orbits of Visual Binary Stars) have been given for the few systems calculated but none have a better than grade 5 certainty (Table 2).
Values from the Fourth Catalogue of Interferometric Measurements have provided a more extensive set of residuals but most of these are from 1991 which is 26 years before the author’s measurements. Although many of the systems have not changed in this time some have and, in certain cases, this shows in the larger residuals calculated (Table 3).
For residuals greater than 1o in PA or 1” in separation relative proper motions have been analysed (Table 4). In certain cases differences between the components’ proper motions may provide a tentative explanation for the larger than average residuals obtained (Table 4).
Some systems have larger than anticipated residuals and alternative residuals have been calculated using the latest WDS measurements for comparison (Table 5).
References:
The Cambridge Double Star Atlas, (Mullany J. Tirion W. pub. Cambridge)
Observing and Measuring Visual Double Stars (ed. Argyle R.W. pub. Springer)
Washington Double Star Catalogue (Mason, B.D., Wycoff, G.L. & Hartkopf, W.I.):
http://ad.usno.navy.mil/proj/WDS
Sixth Catalogue of Orbits of Visual Binary Stars (Hartkopf, W.I., Mason, B.D. & Worley, C.E.):
Fourth Catalogue of Interferometric Measurements of Binary Stars:
http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/int4
Astroplanner:
Table 1: Measurements
|
Pair |
Comp |
RA |
Dec |
Va |
Vb |
PA (o) |
+/- |
Sep (‘’) |
+/- |
Epoch 2018 + |
N |
Obs |
|
STTA 254 |
AB |
00013 |
+6021 |
7.40 |
8.33 |
89.0 |
0.1 |
57.8 |
0.3 |
.742 |
20 |
WST |
|
STF 3053 |
AB |
00026 |
+6606 |
5.96 |
7.17 |
69.5 |
0.1 |
15.0 |
0.1 |
.742 |
20 |
WST |
|
STTA 1 |
AB |
00141 |
+7601 |
7.39 |
7.81 |
103.2 |
0.1 |
73.2 |
0.3 |
.742 |
20 |
WST |
|
H 5 17 |
AB |
00369 |
+3343 |
4.36 |
7.08 |
173.0 |
0.1 |
36.0 |
0.2 |
.809 |
20 |
WST |
|
HJ 1986 |
AB |
00396 |
+8445 |
7.96 |
8.50 |
67.0 |
0.1 |
40.3 |
0.2 |
.742 |
20 |
WST |
|
STFA 1 |
AB |
00464 |
+3057 |
7.25 |
7.43 |
46.8 |
0.1 |
47.8 |
0.2 |
.809 |
20 |
WST |
|
H 5 82 |
AB |
00474 |
+5106 |
7.97 |
8.35 |
75.0 |
0.1 |
56.8 |
0.3 |
.742 |
20 |
WST |
|
STF 88 |
AB |
01057 |
+2128 |
5.27 |
5.45 |
159.5 |
0.1 |
29.2 |
0.2 |
.802 |
20 |
WST |
|
STF 90 |
AB |
01058 |
+0455 |
6.39 |
7.26 |
83.5 |
0.2 |
32.7 |
0.2 |
.802 |
20 |
WST |
|
STF 98 |
AB |
01129 |
+3205 |
7.02 |
8.14 |
250.0 |
0.1 |
20.0 |
0.1 |
.802 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 100 |
AB |
01137 |
+0735 |
5.22 |
6.27 |
63.2 |
0.1 |
23.2 |
0.2 |
.802 |
20 |
WST |
|
HJ 2028 |
AB |
01166 |
+7402 |
7.06 |
7.88 |
203.5 |
0.1 |
62.6 |
0.3 |
.772 |
20 |
WST |
|
STT 30 |
AC |
01256 |
+3133 |
8.09 |
8.06 |
105.7 |
0.1 |
56.7 |
0.3 |
.802 |
20 |
WST |
|
S 398 |
AB |
01284 |
+0758 |
6.34 |
8.02 |
100.4 |
0.1 |
68.9 |
0.3 |
.802 |
20 |
WST |
|
STF 222 |
AB |
02109 |
+3902 |
6.05 |
6.71 |
36.0 |
0.1 |
16.5 |
0.2 |
.809 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
S 405 |
AB |
02128 |
+7941 |
6.47 |
7.15 |
276.7 |
0.1 |
55.5 |
0.3 |
.772 |
20 |
WST |
|
STTA 26 |
AB |
02197 |
+6002 |
6.95 |
7.30 |
200.5 |
0.1 |
62.9 |
0.3 |
.772 |
20 |
WST |
|
CTT3 |
AB |
02359 |
+6338 |
7.78 |
8.30 |
87.5 |
0.1 |
88.1 |
0.4 |
.802 |
20 |
WST |
|
STTA 28 |
AB |
02390 |
+6235 |
6.65 |
7.56 |
147.9 |
0.1 |
67.9 |
0.3 |
.802 |
20 |
WST |
|
STTA 31 |
AB |
03009 |
+5940 |
7.33 |
8.03 |
230.6 |
0.1 |
73.7 |
0.1 |
.802 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STTA 94 |
AB |
08362 |
+1347 |
7.39 |
8.11 |
132.7 |
0.1 |
43.2 |
0.2 |
.298 |
20 |
WST |
|
S571 |
AD |
08399 |
+1933 |
7.31 |
6.67 |
241.9 |
0.1 |
92.1 |
0.4 |
.342 |
20 |
WST |
|
S571 |
AC |
08399 |
+1933 |
7.31 |
7.47 |
157.5 |
0.1 |
45.7 |
0.3 |
.342 |
20 |
WST |
|
STF 1254 |
AC |
08404 |
+1040 |
6.52 |
7.61 |
342.6 |
0.2 |
62.5 |
0.1 |
.298 |
20 |
WST |
|
STF 1268 |
AB |
08467 |
+2846 |
4.13 |
5.99 |
307.9 |
0.2 |
30.7 |
0.1 |
.298 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 1283 |
AB |
08499 |
+1450 |
7.66 |
8.45 |
123.0 |
0.1 |
16.4 |
0.3 |
.298 |
20 |
WST |
|
STTA 96 |
AB |
08520 |
+2543 |
7.65 |
8.45 |
312.0 |
0.1 |
50.0 |
0.1 |
.298 |
20 |
WST |
|
STTA 97 |
AB |
09084 |
+2732 |
8.30 |
8.31 |
273.6 |
0.1 |
51.5 |
0.2 |
.298 |
20 |
WST |
|
STF 1575 |
AB |
11520 |
+0850 |
7.43 |
7.89 |
211.0 |
0.1 |
30.5 |
0.2 |
.342 |
20 |
WST |
|
STF 1579 |
AB D |
11551 |
+4629 |
6.68 |
6.97 |
113.5 |
0.1 |
62.5 |
0.1 |
.523 |
20 |
WST |
|
STF 1579 |
CD |
11551 |
+4629 |
8.32 |
6.97 |
117.0 |
0.1 |
61.9 |
0.2 |
.523 |
20 |
WST |
|
STTA 114 |
AB |
12002 |
+3644 |
7.48 |
8.39 |
83.1 |
0.1 |
86.3 |
0.3 |
.523 |
20 |
WST |
|
STTA 116 |
AB |
12019 |
+0006 |
7.81 |
8.49 |
177.4 |
0.1 |
73.2 |
0.3 |
.324 |
20 |
WST |
|
STF 1603 |
AB |
12081 |
+5528 |
7.82 |
8.26 |
84.5 |
0.2 |
22.5 |
0.1 |
.523 |
20 |
WST |
|
STF 1627 |
AB |
12182 |
-0357 |
6.55 |
6.90 |
196.1 |
0.1 |
20.9 |
0.2 |
.342 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 1649 |
AB |
12316 |
-1104 |
7.97 |
8.43 |
194.0 |
0.1 |
15.7 |
0.2 |
.342 |
20 |
WST |
|
STF 1657 |
AB |
12351 |
+1823 |
5.11 |
6.33 |
271.8 |
0.2 |
20.2 |
0.2 |
.496 |
20 |
WST |
|
STF 1677 |
AB |
12453 |
-0353 |
7.30 |
8.12 |
348.4 |
0.2 |
15.6 |
0.2 |
.342 |
20 |
WST |
|
STF 1678 |
AB |
12454 |
+1422 |
7.16 |
7.68 |
170.0 |
0.1 |
37.5 |
0.1 |
.517 |
20 |
WST |
|
STF 1685 |
AB |
12519 |
+1910 |
7.31 |
7.78 |
202.1 |
0.1 |
16.0 |
0.1 |
.517 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 1692 |
AB |
12560 |
+3819 |
2.85 |
5.52 |
229.8 |
0.1 |
19.5 |
0.3 |
.517 |
20 |
WST |
|
STF 1740 |
AB |
13237 |
+0243 |
7.13 |
7.39 |
74.7 |
0.2 |
25.6 |
0.2 |
.342 |
20 |
WST |
|
H 570 |
AC |
13309 |
+2414 |
7.67 |
8.28 |
256.0 |
0.1 |
76.8 |
0.3 |
.517 |
20 |
WST |
|
S 656 |
AB |
13504 |
+2117 |
6.93 |
7.37 |
208.5 |
0.1 |
86.2 |
0.1 |
.534 |
20 |
WST |
|
SHJ 179 |
AB |
14255 |
-1958 |
6.61 |
7.16 |
295.8 |
0.1 |
35.0 |
0.3 |
.496 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STTA 131 |
AB |
14538 |
-0024 |
7.47 |
8.14 |
215.8 |
0.1 |
83.0 |
0.3 |
.342 |
20 |
WST |
|
HN 28 |
AB |
14575 |
-2125 |
5.88 |
8.18 |
306.0 |
0.1 |
25.0 |
0.1 |
.496 |
20 |
WST |
|
STF 1919 |
AB |
15127 |
+1917 |
6.71 |
7.38 |
10.9 |
0.2 |
23.6 |
0.1 |
.501 |
20 |
WST |
|
SHJ 195 |
AB |
15145 |
-1826 |
6.79 |
8.32 |
140.7 |
0.2 |
47.5 |
0.3 |
.496 |
20 |
WST |
|
SHJ 202 |
AB |
15282 |
-0921 |
6.95 |
7.61 |
132.3 |
0.1 |
52.0 |
0.3 |
.496 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
H 3 7 AC |
AC |
16054 |
-1948 |
2.59 |
4.52 |
20.0 |
0.1 |
13.0 |
0.2 |
.545 |
20 |
WST |
|
STF 2007 |
AB |
16060 |
+1319 |
6.89 |
7.98 |
322.1 |
0.1 |
37.5 |
0.1 |
.501 |
20 |
WST |
|
H 5 6 AC |
|
16120 |
-1928 |
4.35 |
6.60 |
336.5 |
0.1 |
41.3 |
0.2 |
.545 |
20 |
WST |
|
SHJ 225 |
AB |
16201 |
-2003 |
7.39 |
8.08 |
332.8 |
0.2 |
47.1 |
0.2 |
.638 |
20 |
WST |
|
STFA 34 |
AB |
17346 |
+0935 |
5.80 |
7.50 |
191.0 |
0.1 |
41.6 |
0.3 |
.501 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 2185 |
AC |
17348 |
+0601 |
7.46 |
8.43 |
253.0 |
0.1 |
93.2 |
0.4 |
.501 |
20 |
WST |
|
STF 2202 |
AB |
17446 |
+0235 |
6.13 |
6.47 |
93.6 |
0.1 |
20.7 |
0.2 |
.501 |
20 |
WST |
|
S 694 |
AB |
17521 |
+0107 |
6.67 |
7.26 |
237.7 |
0.1 |
79.3 |
0.3 |
.501 |
20 |
WST |
|
SHJ 264 |
AB C |
18187 |
-1837 |
6.86 |
7.63 |
51.1 |
0.1 |
18.1 |
0.2 |
.545 |
20 |
WST |
|
PLT 3 |
AB |
18510 |
-2018 |
7.04 |
7.55 |
101.0 |
0.1 |
93.6 |
0.1 |
.545 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STTA 176 |
AB |
18545 |
+0154 |
7.45 |
7.51 |
111.6 |
0.1 |
94.3 |
0.4 |
.509 |
20 |
WST |
|
STF 2417 |
AB |
18562 |
+0412 |
4.59 |
4.93 |
103.1 |
0.1 |
22.7 |
0.2 |
.509 |
20 |
WST |
|
SHJ 286 |
AB |
19050 |
-0404 |
5.52 |
6.98 |
211.0 |
0.1 |
39.3 |
0.2 |
.509 |
20 |
WST |
|
STTA 178 |
AB |
19153 |
+1505 |
5.69 |
7.64 |
266.7 |
0.2 |
89.6 |
0.3 |
.509 |
20 |
WST |
|
STF 2497 |
AB |
19200 |
+0535 |
7.73 |
8.49 |
356.0 |
0.1 |
30.6 |
0.2 |
.511 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HJ 599 |
AC |
19407 |
-1618 |
5.42 |
7.65 |
40.8 |
0.2 |
45.3 |
0.2 |
.545 |
20 |
WST |
|
STFA 45 |
AB |
19431 |
-0818 |
7.11 |
7.56 |
146.1 |
0.1 |
97.0 |
0.4 |
.511 |
20 |
WST |
|
STF 2594 |
AB |
19546 |
-0814 |
5.65 |
6.35 |
169.9 |
0.1 |
36.0 |
0.2 |
.511 |
20 |
WST |
|
STTA 198 |
AB |
20066 |
+0735 |
7.12 |
7.55 |
185.0 |
0.1 |
64.6 |
0.3 |
.511 |
20 |
WST |
|
S 735 |
AB |
20113 |
-0008 |
7.16 |
7.98 |
211.0 |
0.1 |
56.0 |
0.2 |
.511 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
S 740 |
AB
|
20142 |
+0635 |
7.77 |
8.06 |
191.6 |
0.1 |
43.6 |
0.2 |
.511 |
20 |
WST |
|
S 749 |
AB |
20275 |
-0206 |
6.76 |
7.51 |
189.0 |
0.1 |
60.6 |
0.3 |
.511 |
20 |
WST |
|
STTA 211 |
AB |
20493 |
+5845 |
6.85 |
7.88 |
268.2 |
0.1 |
94.9 |
0.4 |
.807 |
20 |
WST |
|
S 788 |
AB |
21238 |
-0635 |
7.65 |
8.27 |
93.2 |
0.1 |
58.1 |
0.3 |
.638 |
20 |
WST |
|
STFA 56 |
AB |
21377 |
+0637 |
6.18 |
7.50 |
348.3 |
0.1 |
38.8 |
0.2 |
.826 |
20 |
WST |
|
STF 2816 |
AD |
21390 |
+5729 |
5.73 |
7.53 |
338.7 |
0.2 |
20.6 |
0.2 |
.807 |
20 |
WST |
|
STTA 222 |
AB |
21441 |
+0709 |
7.49 |
8.47 |
257.5 |
0.1 |
87.4 |
0.1 |
.826 |
20 |
WST |
|
ES 382 |
AC |
21509 |
+3240 |
8.28 |
8.42 |
322.0 |
0.1 |
58.1 |
0.3 |
.826 |
20 |
WST |
|
STF 2840 |
AB |
21520 |
+5548 |
5.64 |
6.42 |
196.8 |
0.2 |
18.1 |
0.2 |
.807 |
20 |
WST |
|
S 825 |
AB |
23100 |
+3651 |
7.78 |
8.26 |
318.0 |
0.1 |
67.3 |
0.2 |
.809 |
20 |
WST |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
STF 2985 |
AB |
23100 |
+4758 |
7.21 |
8.02 |
256.2 |
0.1 |
15.2 |
0.1 |
.809 |
20 |
WST |
|
SHJ 355 |
AC |
23300 |
+5833 |
4.87 |
7.23 |
268.5 |
0.1 |
75.0 |
0.1 |
.809 |
20 |
WST |
Table 2: Residuals from Known Orbits
|
Pair |
ADS (HIP) |
Residual (O-C) PA (0) |
Residual (O-C) Sep (‘’) |
Orbit |
Period (yrs)
|
Date |
Grade |
|
|
|
|
|
|
|
|
|
|
H N 28 AB |
9446 |
-1.1 |
-0.9 |
Hale |
2130 |
1994 |
5 |
|
S 825 AB |
16558 |
-0.7 |
+0.4 |
Kiselev |
110 000 |
2009 |
5 |
|
S 825 AB |
16558 |
-1.8 |
+0.5 |
Kiselev |
110 000 |
2009 |
5 |
|
S 825 AB |
16558 |
-0.8 |
+0.1 |
Kiselev |
110 000 |
2009 |
5 |
(All Residuals: Observed – latest Catalogue measurement)
Table 3: Residuals from Fourth Catalogue of Interferometric Measurements
|
Pair |
ADS (BDS) |
HIP (TYC) |
Epoch (catalogue) |
Residual PA (0) |
Residual Sep (‘’) |
|
STTA 254 AB |
(12693) |
99 |
1991.61 |
-0.4 |
0.0 |
|
STF 3053 AB |
1 |
207 |
2003.770 |
-0.7 |
0.0 |
|
STTA 1 AB |
(71) |
1124 |
1991.67 |
-0.3 |
-0.7 |
|
H 5 17 AB |
|
|
|
|
|
|
HJ 1986 AB |
(+83) |
(4619 00293) |
1991.69 |
+0.1 |
-0.1 |
|
|
|
|
|
|
|
|
STFA 1 AB |
639 |
3617 |
2003.804 |
+0.5 |
+0.7 |
|
H 5 82 AB |
(417) |
3698 |
1991.76 |
-0.1 |
+1.4 |
|
STF 88 AB |
899 |
5131 |
2003.845 |
-0.2 |
-0.8 |
|
STF 90 AB |
903 |
5141 |
2003.845 |
+0.5 |
-0.1 |
|
STF 98 AB |
988 |
5671 |
1991.45 |
+1.3 |
+0.4 |
|
|
|
|
|
|
|
|
STF 100 AB |
996 |
5737 |
2003.866 |
+0.1 |
+0.6 |
|
HJ 2028 AB |
(BD+73) |
5950 |
1991.67 |
-0.2 |
+0.8 |
|
STT 30 AC |
1134 |
6668 |
1991.54 |
+0.1 |
0.0 |
|
S 398 AB |
(770) |
6868 |
1991.54 |
+0.9 |
-0.1 |
|
STF 222 AB |
1683 |
10176 |
2003.875 |
+0.1 |
0.0 |
|
|
|
|
|
|
|
|
S 405 AB |
(1094) |
10309 |
1991.73 |
+0.2 |
-0.2 |
|
STTA 26 AB |
(1193) |
10856 |
1991.56 |
+0.2 |
-0.5 |
|
CTT3 AB |
(BD+62 423) |
12081 |
1991.66 |
-0.4 |
+0.6 |
|
STTA 28 AB |
(1329) |
12346 |
1991.56 |
+0.1 |
+0.1 |
|
STTA 31 AB |
(BD+59 582) |
14049 |
1991.71 |
+0.4 |
+0.1 |
|
|
|
|
|
|
|
|
STTA 94 AB |
|
42193 |
1991.72 |
-0.3 |
-0.2 |
|
S 571 AD |
6915 |
(1395 02711) |
1991.63 |
+0.1 |
-0.7 |
|
S 571 AC |
6915 |
(1395 02711) |
1991.61 |
+1.0 |
+0.5 |
|
STF 1254 AC |
6921 |
42549 |
1991.59 |
0.0 |
-0.8 |
|
STF 1268 AB |
6988 |
43100 |
2003.283 |
+0.2 |
+0.5 |
|
|
|
|
|
|
|
|
STF 1283 AB |
7031 |
43359 |
1991.56 |
+0.1 |
0.0 |
|
STTA 96 AB |
|
43535 |
1991.57 |
-1.2 |
+1.5 |
|
STTA 97 AB |
|
44858 |
1991.72 |
-0.1 |
-0.2 |
|
STF 1575 AB |
8327 |
57858 |
1991.70 |
+1.0 |
0.0 |
|
STF 1579 AB D |
8347 |
58112 |
1991.73 |
-0.3 |
-0.5 |
|
|
|
|
|
|
|
|
STTA 114 AB |
(5993) |
58530 |
1991.80 |
+0.7 |
-0.5 |
|
STTA 116 AB |
|
58678 |
1991.66 |
0.0 |
+0.4 |
|
STF 1603 AB |
8434 |
59176 |
1991.63 |
+2.1 |
+0.2 |
|
STF 1627 AB |
8505 |
59984 |
2003.284 |
+0.4 |
+1.1 |
|
STF 1649 AB |
8585 |
61127 |
1991.67 |
+0.1 |
+0.2 |
|
|
|
|
|
|
|
|
STF 1657 AB |
8600 |
61418 |
2003.284 |
+1.7 |
+0.3 |
|
STF 1677 AB |
8657 |
62234 |
1991.51 |
+0.5 |
-0.5 |
|
STF 1678 AB |
8659 |
62248 |
2003.251 |
-2.1 |
+0.8 |
|
STF 1685 AB |
8690 |
62783 |
1991.63 |
-0.6 |
0.0 |
|
STF 1692 AB |
8706 |
63125 |
2003.284 |
+1.2 |
+0.4 |
|
|
|
|
|
|
|
|
STF 1740 AB |
8883 |
65352 |
1991.31 |
0.0 |
-0.7 |
|
H 570 AC |
8929 |
65921 |
1991.66 |
-0.7 |
+1.3 |
|
S 656 AB |
(6647) |
67543 |
1991.75 |
+0.3 |
+0.4 |
|
SHJ 179 AB |
9258 |
70518 |
2003.481 |
+0.4 |
+0.8 |
|
STTA 131 AB |
|
72888 |
1991.52 |
+1.3 |
-1.1 |
|
|
|
|
|
|
|
|
HN 28 AB |
9446 |
73184 |
1991.48 |
+1.4 |
+0.8 |
|
STF 1919 AB |
9535 |
74432 |
2003.284 |
+0.7 |
+0.5 |
|
SHJ 195 AB |
(17 4283) |
(6174 00156) |
1991.58 |
+0.8 |
+0.4 |
|
SHJ 202 AB |
(7268) |
75718 |
1991.52 |
-0.3 |
-0.1 |
|
H 3 7 AC |
9913 |
78820 |
2005.498 |
+0.2 |
-0.6 |
|
|
|
|
|
|
|
|
STF 2007 AB |
9922 |
78875 |
2003.418 |
-0.3 |
-0.3 |
|
H 5 6 AC |
9951 |
79374 |
2003.418 |
-0.4 |
+0.5 |
|
SHJ 225 AB |
(7575) |
80024 |
1991.53 |
0.0 |
+0.4 |
|
STFA 34 AB |
10635 |
85998 |
2003.418 |
+0.8 |
+0.2 |
|
STF 2185 AC |
10638 |
86024 |
1991.52 |
+9.2 |
+6.9 |
|
|
|
|
|
|
|
|
STF 2202 AB |
10750 |
86831 |
2003.290 |
+0.5 |
+0.3 |
|
S 694 AB |
(8198) |
87448 |
1991.67 |
+0.4 |
-0.6 |
|
SHJ 264 AB C |
11240 |
(6269 04010) |
2009.668 |
-0.4 |
+1.2 |
|
PLT 3 AB |
|
92491 |
1991.72 |
+0.1 |
+0.4 |
|
STTA 176 AB |
(8894) |
92794 |
1991.81 |
-1.0 |
-0.4 |
|
|
|
|
|
|
|
|
STF 2417 AB |
11853 |
92946 |
2003.580 |
-0.5 |
+0.6 |
|
SHJ 286 AB |
12007 |
93717 |
2003.418 |
+1.4 |
+0.1 |
|
STTA 178 AB |
(9149) |
94624 |
1991.57 |
-0.3 |
-0.2 |
|
STF 2497 AB |
(9208) |
95017 |
1991.79 |
-0.6 |
+0.6 |
|
HJ 599 AC |
12767 |
96808 |
2003.628 |
-0.7 |
+0.6 |
|
|
|
|
|
|
|
|
STFA 45 AB |
(9525) |
97016 |
1991.82 |
+0.3 |
+0.3 |
|
STF 2594 AB |
13087 |
97966 |
2003.418 |
-0.7 |
+0.3 |
|
STTA 198 AB |
13379 |
99055 |
1991.49 |
-0.6 |
-0.4 |
|
S 735 AB |
(9961) |
99476 |
1991.49 |
+1.7 |
+0.6 |
|
S 740 AB |
(10012) |
99729 |
1991.59 |
-0.2 |
+0.3 |
|
|
|
|
|
|
|
|
S 749 AB |
13868 |
100896 |
1991.46 |
+0.5 |
+0.7 |
|
STTA 211 AB |
(10577) |
102775 |
1991.72 |
+1.9 |
-3.0 |
|
S 788 AB |
(10943) |
105641 |
1991.66 |
+1.3 |
+3.2 |
|
STF 2816 AD |
15184 |
106886 |
2003.620 |
0.0 |
+0.9 |
|
STF 2840 AB |
15405 |
107930 |
2003.621 |
+1.1 |
+0.4 |
|
|
|
|
|
|
|
|
S 825 AB |
16558 |
114390 |
1991.76 |
-0.5 |
+0.1 |
|
STF 2985 AB |
16557 |
114385 |
2012.6746 |
+0.5 |
-0.6 |
|
SHJ 355 AC |
16795 |
115990 |
1991.59 |
-0.3 |
-0.6 |
|
|
|
|
|
|
|
Table 4: Doubles with significant proper motion differences
(All Proper Motions: WDS 2018)
|
Pair |
Comp |
Epoch |
μα |
μδ |
μα |
μδ |
Δθ (o) |
Δρ (‘’) |
|
H 5 82 |
AB |
1991 |
-026 |
-024 |
+017 |
+004 |
-0.1 |
+1.4 |
|
STF 98 |
AB |
1991 |
+013 |
-009 |
+013 |
-009 |
+1.3 |
+0.4 |
|
S 571 |
AC |
1991 |
-036 |
-012 |
-035 |
-014 |
+1.0 |
+0.5 |
|
STTA 96 |
AB |
1991 |
-004 |
-038 |
-047 |
-001 |
-1.2 |
+1.5 |
|
STF 1575 |
AB |
1991 |
-010 |
-050 |
+008 |
-051 |
+1.0 |
0.0 |
|
|
|
|
|
|
|
|
|
|
|
STF 1603 |
AB |
1991 |
-178 |
-017 |
-180 |
-033 |
+2.1 |
+0.2 |
|
STF 1627 |
AB |
2002 |
-014 |
+022 |
-012 |
+031 |
+0.4 |
+1.1 |
|
STF 1657 |
AB |
2003 |
-004 |
+023 |
-001 |
+025 |
+1.7 |
+0.3 |
|
STF 1678 |
AB |
2003 |
-050 |
+004 |
+081 |
-044 |
-2.1 |
+0.8 |
|
STF 1692 |
AB |
2003 |
-233 |
+055 |
-204 |
+088 |
+1.2 |
+0.4 |
|
|
|
|
|
|
|
|
|
|
|
H 570 |
AC |
1991 |
+006 |
+019 |
-055 |
-019 |
-0.7 |
+1.3 |
|
STTA 131 |
AB |
1991 |
+021 |
-058 |
+001 |
+010 |
+1.3 |
-1.1 |
|
H N 28 |
AB |
1991 |
+103 |
-173 |
+010 |
-017 |
+1.4 |
+0.8 |
|
STF 2185 |
AC |
1991 |
+012 |
-069 |
-459 |
+377 |
+9.2 |
+6.9 |
|
SHJ 264 |
AB C |
2009 |
+001 |
-004 |
+000 |
-001 |
-0.4 |
+1.2 |
|
|
|
|
|
|
|
|
|
|
|
STTA 176 |
AB |
1991 |
+006 |
-062 |
+000 |
-014 |
-1.0 |
-0.4 |
|
SHJ 286 |
AB |
2003 |
+022 |
-026 |
+000 |
-039 |
+1.4 |
+0.1 |
|
S 735 |
AB |
1991 |
+025 |
-028 |
-014 |
-010 |
+1.7 |
+0.6 |
|
STTA 211 |
AB |
1991 |
-004 |
-002 |
+131 |
+100 |
+1.9 |
-3.0 |
|
S 788 |
AB |
1991 |
-129 |
-004 |
-015 |
-044 |
+1.3 |
+3.2 |
|
|
|
|
|
|
|
|
|
|
|
STF 2840 |
AB |
2003 |
+019 |
-001 |
+013 |
+013 |
+1.1 |
+0.4 |
Table 5: Alternative Residuals: WDS
|
Pair |
Epoch (WDS) |
Residual PA (0) (Fourth Catalogue) |
Residual Sep (“) (Fourth Catalogue) |
|
|
|
|
|
|
STF 1603 AB |
2015 |
+2.1 (+2.1) |
+0.4 (+0.2) |
|
STF 1678 AB |
2017 |
0.0 (-2.1) |
-0.2 (+0.8) |
|
STTA 131 AB |
2017 |
-0.2 (+1.3) |
+0.2 (-1.1) |
|
STF 2185 AC |
2015 |
-0.6 (+9.2) |
+0.4 (+6.9 |
|
SHJ 286 AB |
2017 |
+0.5 (+1.4) |
-0.3 (+0.1) |
|
|
|
|
|
|
S 735 AB |
2015 |
0.0 (+1.7) |
+0.4 (+0.6) |
|
S 788 AB |
2017 |
+0.1 (+1.3) |
+0.6 (+3.2) |