micrometric measures of double stars
TRANSCRIPT
ASTRONOMI SCHE NACHRICHTEN.
1908.564 8.660 8.717 8.788
Band 181.
285.0 1.35
282.2 I -40 281.7 0.98
284.0 -
Nr. 4336.
225.4
224.2 223.3
16.
17.76
17.64 '7.99
Micrometric measures of double stars. By Philip Fox.
The following measures of miscellaneous double stars have been made with the 12-inch and 40-inch refractors of the Yerkes Observatory. The latter instrument has not been regularly assigned for this work, but has been utilized on occasions when conditions were not favorable for securing parallax plates. The time thus available has been used chiefly for the measurement of the Holden stars all of which are on my observing list. About half of these are
B G. C. 27. Arg. I.
1908.799 14406 23173 8.843 144.8 23.90 8.819 1 144.1 I 23-85
1908.840 1 144.5 I 23.83
36. h 1939. 1908.804 160.6 34.19
8.838 I 160.2 I 34.83 8.843 I 160.1 I 34.68
1908.828 I 160.3 I 34.77
38. 2 5. 34 Piscium. 1908.838
8.862 8.843
1908.848
1 908.1 99 8.971 9.140
1908.970
i908.564 8.785 8.793
1908.7 14
1907.7 2 0
7.7 5 5 1.75a
I907*744
40 I 2 I 2
I 2 I 2 I 2 -
I 2 I 2 I 2 -
40 12 I 2
56. 02 I .
202.7
203.6 1 1 :z 206.2 A 0
12
I 2 12
now measured but they will be reserved until all may appear together.
Each position angle, below, is derived from four in- dependent settings and each distance from three or more double distances. The star positions are not given, as the Burnham G.C. number and the name of the double star seem sufficient. The last column indicates the instrument used, the two telescopes being distinguished by their apertures.
102. 2 16. 1908.879 3708 5185
8.882 1 36.5 I 5.72 8.884 37.1 5.66
1908.882 I 37.1 I 5.74
117. 2 21 rej. I901.172
7.788 7-31 I907.719 I 49.8 I 1-75
40 I 2 I 2 -
I 2
I 2 I 2 -
I 2 I2 I 2
1908.879 219.2 5.87 40
8.887 219.3 6.08 40 8.884 I 218.3 1 ' 6.02 1 12
~908.883 I 218.9 I 5.99
40 40 40 I 2
I2
40 I2
297. Espin 3. 1908.879 15506 7196 40
8.884 156.3 8.971 I 157.9 I i::: 1 ::
1908.911 I 156.6 I 8.08
368. 2 4 9 . 1908.564 319.1 6.66 40
8.604 319.4 6.69 40 8.117 I 320.2 1 6-19 1 40
1908.628 I 319.6 I 6.71
374. 02 18.
40 8.111 139.9 1.14 40 8.838 I 137.4 I 1.01 I I 2
1908.564 138.9 -
1908.706 I 138.7 I 1.08
397=400. A . G . l = h 6 .
1908.9 I 7 2 1-44
1908.944 I 317.2 I 21.25
8.971 I i:::: 1 21.07 I :: 408. h i .
1908.884 306.8 21.13 12
8.971 306.4 20.87 12 8.881 1 308.4 1 20.97 1 40
1908.914 I 307.2 I 20.99
432. Hd 35.
8.884 1908.881 I 35.4 I 7.11
I7
4336
655. 2 3, App. I. 37 Ceti.
266.6 265.9 265.4 263.7
248
3559. 2 948. 1 2 Lpncis.
2.26 2.09 2.12 2.24
321.0 320.1 319.7
21.94 21.95 22.20
1909.044 9.112
9.162 9.140
28.4 2.77 40 I2
25.4 3.04 I2 29.6 --
25.8 2.79 12
2 61. 65 Piscium. 29609 4146 12
297.0 4.32 12
296-4 1 4-47 1 12
A and R. 11204 I 1182 1 12
1.80 1 2 112.2 I I 2.4 1 1.65 i I 2
112.3 I 1.16
A and C.
306.6 1 8.45
1901 *I 7 2 7.788 8.804
1908.1 2 I
1908.97 I 9.112 9.140
1909.01 4
1909.112 9.140 9.162
1909.138
1909.1 I 2 9.140 9.162
1909.138
296.8 I 4.42
456. 267. 1907.777 360.0 2.11
1.788 359.7 2.13 8.838 1 358.7 I 1.94
1908.134 I 359.5 I 2.06
463. 0. Stone 3.
331.3 I 49.70 662. $ 3.
26.9 1 4.54
684. Kr 11.
I2 12 I 2 -
12 I 2 I 2 12
12 I 2 I 2 -
I 2 I 2 I 2 -
3612. Espin I 5. 1908.838 8.862 8.876 8.884
1908.865
I 908.876 8.884
1908.880
1901.1 7 2
7.788 1.807
1901-789
1908.911 239.3 1.87 9.112 1 237.7 I 1.87 9.140 236.9 2.12
1909.014 I 238.0 I 1.95
811. Howe 5.
275.2 29.55 I 2
275.4 1 29.94 1 12 275.2 29.29 12
275.3 I 29.59 -
1908.098 The measures indicate considerable
change in distance.
3732. 2 994. Telescopii 36 B. I2 I 2
1901.1 58 8.2 5 5 8.282
56.4 26.43 1 2
55.8 1 26.36 1 1 2 55.9 26.32 1 2
56.0 I 26.37 I2 I2 12 -
1908.098
3954. h 3945. 1908.241 61.2 27.21 12
8.296 21.14 0.112 1 2::; 1 27.38 1 :: 1908.785 153.1 13.53 I2
8.799 1 153.1 1 13-65 I 40 8.804 154.4 13.46 12
1908.196 I 153.5 I 13-55 568. 2 8 7 .
1908.785 196.1 6.73 12 8.804 196.2 6.65 12 8.838 I 196.1 I 6.53 1 I 2
1908.809 1 196.1 I 6.64
591. 291. &ti 160 B.
1908.121 1 319.4 I 4.17 618. h 2023.
1908.838 27.6 4.35 12 8.884 1 28.7 I 3.99 I 1 2
1908.861 I 28.2 I 4.17 653. 2 101.
190'1.1 72 21.61 12
8.804 342.6 21.28 12 7.788 1 ::::I I 21.26 I I 2
1908.121 I 342.4 I 21.38
1908.550 I 60.3 I 27.44
4147. S 5 5 2. d, ns Puppis.
I 2
1908.209 1 290.5 I 9.29 Judging from the wide distance
of relative magnitude found in the estimates of various observers, one of these stars is possibly variable.
4595. Espin 18. 1909.112 234.8 11.89 12
9.153 235.3 12.14 1 2
9.140 1 235.8 I 12.11 I I 2
1909.114 I 27.3 I 2.87
2637. 2 681. 1908.255 180.5 23.28
8.282 180.8 2.3.06 8.277 1 180.1 1 23.22
12 I 2 I 2
1908.271 I 180.5 I 23.19
3462. 2 923 rej. 1909.060 144.2 30.65
9.112 1 145.8 1 30.21 9.140 143.8 30.53
1909.104 I 144.6 I 30.46
3541. 2946. 1909.060 126.8 4.35
9.140 130.2 4.16 9.112 1 128.3 1 4.20
1909.104 I 128.4 1 4.24
40 I2 I 2 -
40 I2 I2
1909.135 I 235.3 1 12.05
1909.044 132.9 43.56
4678. 02 (App.) 94.
9.122 132.2 43.59 9.140 1 132.5 1 43.77
1909.102 I 132.5 1 43.64
40 I 2 I 2
249
1908.296
8.334 8.304
4336
214.8 2'3.9 2 13.1
1908.277 8.285 8.334 8.400
332.5 1.63 12 331.1 1.73 1 2 335.5 1-56 1 2
333.6 1.34 12
1908.422 8.485
8.553 8.518
124.6 0.98 12 128.2 1.26 12
129.9 1.22 I 2 130.8 1.27 12
1908.485 8.553 8.630
205.9 206.0 204.5
5352. H 477. 6064. Z 1608. 1908.427 221O9 12r17 12
9.162 222.3 12.04 12 9.140 I 222.1 1 12.14 1 I 2
1908.910 I 222.1 I 12.12
6367. B 929. 48 Virginis. 1908.2 17 2 I 3.0 0.70 I 2
8.334 2'5.3 I 2 8.400 I 208.2 I :::: 1 I 2
1908.337 I 212.2 I 0.64
6398. 2 1722. Comae 179 B.
1908.431 1 337.3 1 3.33
6415. 02261.
4723. 2 1258. 1908.296 33109 I O ~ O I 12
8.304 331.8 10.04 12
8.395 1 330.1 1 9.99 I 1 2
1908.332 I 331.5 I 10.01
953 9123 40
95.9 I 9.33
97.1 1 9.50 I 1 2 95.4 9.26 12
1909.060 9.112 9.140
1909.104
,5400. B 1427.
9.5 5
5599. 02 230. 1908.27 7
8.400 8.42 2
19.7 20.6 2 1.5
8.54 8-35 8.30
I2 I 2 I 2
8.425 I 21.7 I 8.66 I 12
1908.381 I 20.9 I 8.46
5641. Weisse 26. 343.9 I 2
343.7 I 2 343.2 1 ::$ 1 I 2
343.6 I 1-11
1908.422 8.465 8.48 5
1908.4 5 7
1908.400 8.42 2 8.42 5
1908.4 I 6 6490- B231.
I 2
1908.437 I 204.2 I 3.08
5734. 2 1523. F Ursae maj. 5071. Z 1348. Hydrae 116 B. 1908.277 322.0 2.09 12
8.334 322.3 I 2 8.400 I 321.8 I ::it 1 I 2
1908.337 I 322.0 I 1.89
5094. '355.
1908-277 335.0 2.44 I 2
8.400 1 333.9 I :::: 1 I 2
8.334 335.0 I 2
1908.331 I 334.6 I 2.56
5103. 2 1356. o Leonis. 1908.277 119.4 1 2
. 8.334 1 119.7 1 :::; 1 I 2 8.422 118.9 0.89 1 2
1908.344 1 119.3 I 1.02
5337. Z 1412 rej. 1908.966 31.36
9.060
I 2
129.8 I 3.14 I I 2
129.3 I 3.00
I 28.9 -
129.1 2.85 12
L: 1536. c Leonis. 49.0 2.32 12
47.5 2.28 40 50.2 I 2.28 I I 2
48.9 I 2.29
1908.427 8.465 8.553
1908.482
5765. 1908.427
9.060 9.112
1908.866
6551. 2 1767. 1908.42 5
8.485 8.479
349.0 I 2
5803. B 340. 1909.060
9.140 9.162
1909.121 I 5.8 I 4.18
m. 2 1604. Virginis 59 B. A and B. 6577. 2 1 1 7 1 .
:::: I :: 1.70 I 2
1.88
91.4 10.56 I 2 91.2 1 10.84 1 I 2 91.5 10.90 12
1908.296 8.304
1908.332 8.397
1908.296 8.304
1908.332 8.391
1909.023 I 294.7 I 31.20
5351. Z 1416. 1908.296 275.7 11.68
8.304 1 2 7 5 . 5 1 11.78 8.397 276.6 11.68
1908.332 I 275.9 1 11.71
91.4 I I O . 7 7
A and C.
89-6 I 33.87
184.
9.05 I7*
I2 I 2 I 2 -
I 2 I 2 I 2 -
6725. 2 1802. 1908.392
8.455 8.465
1908.304 28304 5172 8.313 1 281.6 1 5.44 8.389 280.9 5.54
1908.355 I 282.0 I 5-57
6731. 02 276.
20500 203.6 205.1
1908.313 8.389 8.444
1908,402
1908.37 3 8.389 8.444
1908.402
6778.
1907.485 1.701 7.111
I 2
40 1 2 -
I 12.5
113.4 114.9
A and B.
191.5 I 0.57
A and C.
72.1 I 9.57
1908.422 8.455
8.518 8.479
2 1821. x Bootis.
299.0 1.1 3 305.' 1-94 298.2 1.68 300.5 1.7 I
1908.422 236.6 13.20 12
8.425 1 236.4 13.03 1 I 2 8.455 237.1 13.14 I2
1908.434 I 236.7 I 13.12
6963. 02 284.
1908.334 8.392 8.465 8.479
1908.465 100.9 7.14
8.518 1 101.1 I 7.14 1908.487 I 101.1 I 7.35
8.479 101.3 7.78
7002. 2 1881.
1908.334 8.444 I ii;:: i:;: 8.455 358.0 3.83
1908.411 I 357.2 I 3-10
7049. 02 288,
1908.334 185.9 1-14
8.416 1 185.4 I 1.85 8.373 188.1 1.94
1908.374 I 186.5 I 1.84
202.9 2.29 202.8 2.22 200.5 2.12
198.1 I .94
1 2
I 2 I2
- 0 .71
0.68 0.83
I2 I2 I2 -
I 2
40 I 2
I 2 I 2 12 12
70%. B 348. 2 Serpentis.
I 2 - 1908.531 I 115.5 I 0.54
7120. 2 1909. 44 Bootis.
1908.304 242.7 4.53 1 2
8.389 244.0 8.416 1 242.3 1 i::: I ::
1908.310 1 243.0 I 4.42
1908.277
8.400 8.334
8.444
4336
45.1 48.4 45.8 45.4
7127. 2 1910. 1908.304 21106 4169 12
8.334 210.6 8.373 I 209.6 z::: 1 i:
1908.337 I 210.6 I 4.51
7153. 2 1918 rej. Draconis 67 B. 1908.304 20.9 18.11 12
8.389 21.2 18.01 I2 8.416 1 20.2 17.95 1 12
1908.370 I 20.8 I 18.02
2.34 2.13
2.14 2.20
12 12
12 I 2
I 2 I2 I 2 I 2 -
1908.616 219.0 8.633 219.1 8.655 218.5 8.660 219.5
7367. B 619. Serpentis 55 B.
11.38 40 11.34 1 2 11.41 12 11.51 40
1908.2 7 7 8.334 8.389
1908.333 7533.
1908.2 f 7 8.334 8.400 8.444
1908.364
1908.334 '58.9
8.507 161.9
8.392 164.2 8.455 162.3
6.4 0.62 12
7.4 1 0.59 I 12 9.0 0.61 12
7.6 I 0.61
B 120. v Scorpii. A and B.
1.45 1.40 1.19 1.39
363.3 357.6
357.1 361.8
0. I
77%. Swift. 40
40 I2
I2
40
40 I 2
8.455 I 119.1 I 5-13 I 1 2
1908.421 I 118.0 I 5.06
2 5 2
7900. 02325.
f39 40 1.06 1 I2 1.09 12
1.18
a Herculis.
4.97 1 2
4.72 I 1 2 I 2 -
4.84
46. I 2
40 I 2 I 2
253
1908.392 11402
8.520 113.4
8.465 114.8 8.487 113.9
8.553 113.6
4336
2.45 2.43
2.44 2.41
-
254
116.3 117.0
117.0
10919. $ 1262. 1908.644 11304 2102 40
8.698 114.9 40 8.717 1 113.5 1 :::: 1 40
1908.686 1 113.9 1 1.94
11214 2 2822. p Cygni. 151.41 150.94 151.41
1907.485 7.701 7 . 7 1 1
A and D. 29502 126142 12
295.7 127.07 12 295.7 1 126.61 I I 2
124.1
122.4 122.0
40
40 I 2
I 2 I 2
6.55
6.57
6.47 6.52
1907.581 7.638 7.692
1901.63 7
1907.581 7.638 7.692
1907-631
40 12 12
40
1907.638 1.755 7.758
I 2 I2 I 2
184.8 185.1
185.1
22..55 22.46 22.39
12 12 I2
1907.720 7.73' 7.755
1901*735
el Lyrae.
3-21
es Lyrae. 2.39 12
2-14 1 12 2.71 I 2
2.6 I
124.6 I 2.37
1907.581 357.0 167.23 1.638 1 356.7 I 168.49 11483. 2 2863. Cephei.
1908.373 282.1 6.97 40 8.583 283.2 7.02 40 8.613 1 282.4 1 6.92 1 I 2
1908.523 I 282.6 I 6.97
11490. B 2862. 1907.638 100.1 2.76 1 2
7.695 1 100.7 I 2.48 I 12
7.692 101.1 2.71 I 2
1907.675 I 100.6 I 2.65
11514. B 2873. Cephei 180 B. 1908.373 72.7 13.88 40
8.583 13.61 40 8.613 1 i::: I 13.65 1 I 2
1908.523 I 73.3 I 13.71
11590. 2 2878. Pegasi 148 B.
I2 I 2 I 2
9070. Ho 5 7 1 . 1908.564 214.4 1 1 . 7 1
8.616 214.5 11.76 8.799 1 215.5 1 12.11
1908.660 I 214.8 I 11.86
9341. $424.
8860. 2 2404. Tauri Pon. 78 B. 1908.392 179.1 3.83 40
8.487 1 179.7 1 $: 1 i t 8.465 181.5
1908.448 1 180.3 I 3.78
9015. B 2445. Vulpeculae I B. 1908.392 262.5 40
8.604 263.4 40 8.564 1 262.7 1 ~~~~~. I 40
1908.520 I 262.9 I 12.43
9028. 2449.
40 1908.527 I 290.8 1 8.11
9029. Da 9.
1908.818 I 35.2 I 2.83
9818. B 2613. Aquilae 210 B. 1907.638 341.8 4.41 I 2
1907.665 I 348.3 1 4.51
7.663 347.8 4.79 12
7.695 I 3494 i 4.33 I 12
9982. B 2644. 1907.638 207.4 3.25 12
7.663 204.8 I 2
7.695 1 207.6 1 i::; 1 I 2
1907.665 I 206.6 I 3.20
10447. 22718.
1901.695 '25.3 12
7.720 1 125.5 1 :::: 1 I2 7.731 126.2 1.40 12
I907.7I5 I 125.7 I 1-50
11702. 2 2902. 1908.87 9
8.882 8.884 8.917
1908.890
11743. 1907.638
7.692 7.695
1901.61 5
177.2 1.96 40 180.5 2.12 40. 178.3 1 1.75 1 12
178.7 I 1-94
2 2461. 17 Lyrae. A and B. 306.3 3.98 12
312.7 1 4.04 I 12 312.7 3.68 12
310.6 I 3.90
A and C.
1908.564 8.604 8.613
1908.594
9053.
1907.581 7.638 1.692
I 901 -63 7
I 2 I 2 I 2
1907.638 7.695 7.70' 7.720
1907.688
10676. 1907.638
7.695 7.720
1907.684
87.6 I 8.73 I 12
86.2 I 8.89
2 2742. 2 Equulei. 2 20.0 2.93 2 20.8 I 2.79 221.q 2.00
I 2 I 2 I 2
220.8 I 2.87
10801. H 1.47. 1908.698 316.5 3.28 40
8.717 I 3'5.9 I 3.40 I 40 1908.707 I 316.2 I 3.34
1907.581 66.6 130.10 12
7.638 66.3 130.71 12 7.692 I 66.3 1 130.93 I I 2
1907.637 I 66.4 I 130.58
2 5 5
11866. L 2928. 1907.692 31004 4154
7.695 310.0 3.9 I 7.701 1 310.2 I 4.11
1907.696 I 310.2 I 4.21
11997. 2 2947.
1907.720 7.758 7.166
I 2 I 2 12
12801 128.4 128.1
1908.524 I 63.8 I 3.89
12021. 2 2950. Cephei 24 1908.373 306.4 2.43
8.613 I 305.5 I 2.09 8.630 304.1 2.09
'908.539 I 305.3 I a20
12036. B 382. I907-73I 234.3 1.2 I
1907.760 1 235.1 I 1.21
7.788 I 235.9 I 1.21
12076. 2 2961.
13.49 13.44. 13-51
'B. 40 I 2 I 2
1 2
12
12
I 2 I 2 -
43 36
A and C. 1907.772 20901 ! 28747 12
1907.780 1 208.2 1 28.33 1 207.3 I 28.19 I 12
12173. L 2978.
1907.638 7.720 1-73'
1907.696
143.5 8.89 I2
143.1 1 8.48 1 I 2 144.5 8.56 I 2
143.7 I 8.64
12213. 2 2988. Aquarii 284 B. 1907.663 279.1 3.85 12
7.692 1 278.9 1 3.92 I 1 2 7.695 278.8 3.86 '12
1907.683 1 278.9 I 3.88
12265. 22995. 1907.663
7.692 7-69 5
1907.683
12292. 1907.720
7.731 7.1 50
1901*134
28.2 29.1 28.5 28.6.
2 2998.
346.8 347.0 347.3 347.0
12421. Espin 109. 1908.698 6.32 40
1908.707 1 43.0 I 6.26 8.717 I i::: 1 6.21 I 40
Yerkes Observatory, Williams Bay, Wisc. ,~ 909 .4pril 5 .
256
12517. 08 503.
1907.748 1 128.2
1144 1.60 1.59 1.54
i2
i2 12
ro7 Aquarii.
6.04 12 6.48 1 1 2 6.12 1 2
6.2 I
12613. L 3044.
1907.744 1 281.8 I 19.11
12623. B. A. C. 8308. 1907.720 268.4 6.75
7.177 269.2 6.80 7.766 I 267.9 1 6.90
1907.754 I 268.5 I 6.82
Philip Fox.
Zur Frage des Lichtwechsels des Sternes BD +36"3243 (7"). Von Lad. Prnckn.
Miss A. J. Cannon fuhrt diesen von A. Safarfk (A. N. 2874) als veranderlich angezeigten Stern (18~37~48?6 +36" 49" 1855.0) im Harvard Second Cat. p. 93 als wahrscheinlich veranderlich und von anderen Beobachtern bestatigt an. Bei der Bearbeitung des Safarfkschen Nachlasses habe ich aus I 33 Beobachtungstagen folgende Resultate erhalten : Im An- schlusse an die Potsdamer Durchmusterung bestinimte ich die Amplitude des hypoth. Lichtwechsels 7% bis 7". Das Beobachtungsmaterial ist in diesem Falle sehr homogen, und die Beobachtungen ergeben eine ausgepragte Lichtvariation, deren Form insoweit sehr eigentiimlich ist, als der Stern mehrere Monate in der Maximal- bezw. Minimal-Phase kon- stant bleibt. Die Periode ist dann nahezu ein Jahr. Ob- wohl die Beobachtungen selbst zu keinem Zweifel *4nlaO geben, bin ich doch der Meinung, daO in diesem Falle das Resultat doch mit Vorsicht aufzunehmen ist. Die Maxima fallen alle in die Zeit Mai-Juni, die Minima dagegen in die
12 12 12
12 12 12 -
Wintermonate. Ich habe nun alle Beobachtungen als Funk- tion des Stundenwinkels auszudriicken versucht und bekam aus ihrer Gesamtheit eine glatte Kurve, deren Kulmination auf Ende Juni fallt. Es ist demnach sehr wahrscheinlich, daO die Schatzung der Helligkeit des gefarbten Sterns (7%) von seiner Hohe abhangig war, wozu die selektive Absorption der Prager Atmosphare einen nicht geringen Beitrag liefern konnte, und daO der Stern auf Grund der Safarikschen Re- obachtungen allein bei seiner geringen Amplitude nicht als sicher veranderlich gelten kann. Die Beobachtungsreihe u m - fafit den ZeiQauni 1883- 1893, und die Originale erscheinen in der Gesamtausgabe meiner Bearbeitung, welche zur Publi- kation von der Kgl. Gesellschaft der Wissenschaften in Prag angenommen wurde. - Diesem kritischen Zweifel wider- sprechen die Beobachtungen Espins (A. N. 132.287) und Yendells (A. J. 14.133), welche fur spatere Zeit die Ampli- tuden bis zu 1m4 fanden, so daO der Stern dann doch rer-