Page images
PDF
EPUB

TABLE VIII.

PARALLAX OF THE SUN ON THE FIRST DAY OF EACH MONTH, THE

MEAN HORIZONTAL PARALLAX BEING 8":6,0.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

0

8.75

8.73

8.67

8.60

8.53

8:48

8.46

The Sun's Horizontal Parallax is also given for every ten days, in the Nautical Almanac, immediately before the ephemeris of the planets.

The Sun's Parallax in Altitude, for every degree, is given in the last of Dr. Pearson's “ Solar Tables," vol. i. page 180.

TABLE IX.

REDUCTION OF THE MOON'S EQUATORIAL HORIZONTAL PARALLAX,

TO THE HORIZONTAL PARALLAX IN ANY LATITUDE.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

The Moon's 'Horizontal Parallax, given in the third page of each month in the Nautical Almanac for noon and midnight, is the equatorial parallax for Greenwich mean noon and midnight; from thence it is to be deduced for the time and place of observation. The correction for latitude, on account of the spherical figure of the earth, is seldom thought of at sea, but can be made from the table above. Thus, supposing the hor. equat. par. to be 58'; the hor: par. in lat. 52° would be 58' — 71.2 = 57' 52".8.

This reduced hor. par. is to be farther corrected for altitude by means of tables for that purpose (see Pearson, vol. i. pages 188 to 196 : and Riddle, pages 156* to 173); or by the following rule:-sin hor. par. X cos alt. sine par. in alt.

* Riddle's tables are for clearing the lunar distance, and the corrections are for both parallax and refraction.

*

[merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][ocr errors][ocr errors][merged small][merged small][merged small][merged small]

The Parallaxes and Semidiameters of the Planets are given in the Nautical Almanac.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

DIP OF THE SEA HORIZON AT DIFFERENT DISTANCES FROM IT.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][ocr errors]

11 6 4

22 11

0.25 0.5 0.75 1.0 1.25 1.5 2:0 2.5 3:0

68 34 23 17 14

3

[ocr errors]

12

[ocr errors]

3.5

34
17
12

45
22
15
12

56
28
19
15
12
10
8
7

弘B9765544444

伍%B986655444

2
2
2
2
2
2
2

ܣܗܗ ܗܗܗܗ

10 8 7 6 6 5 5

OOOOO

4.0 5.0 6.0

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][ocr errors][ocr errors][ocr errors][ocr errors]
[ocr errors]

00-0

2.0

314 317 31.9 32.2 32.5 327 33.0 33.3 33.5 338 34 1 344 34-6 34.9 352 35.5 3507 36°0 36'3 3606 36.9 37.2 3704 377 38'0 383 386 389 39'2 39'5 3998 40-1 403 40'6 40'9 412 415 4108 42'1 42'5 42'8 43'1 43:4 4397 44'0 443 44'6 44'9 45'2 45'5 45'9 46'2 46 5 46'8 4781 4765 47'8 48'1 484 48.8

49-1 49.4 49 7 50:1 50-4 50°7 51:1 514 51.7 52.1 52.4 52-7 53:1 5304 53.8 54.1 54-5 54.8 55.1 55-5 55'8 562 56.5 56.9 573 5706 58.0 583 587 59'0 59.4 59 8 60*1 60-5 60-8 612 61.6 61.9 62.3 62:7 63'0 6304 63.8 642 64.5 64.9 6503 65-7 660 66-4 66-8 6762 67-6 680 683 687 69 1 69.5 69.9 70o3

70-7 96-2 125-7 159.0 196-3 23705 2827 331.8 3847 71.1 967 126.2 159.6 197.0 238 3 283.5 332-6 385-6 71.5 97.1 126.7 160-2197-6 239-0 284 233304 386.6 71.9 97.6 127 2 1608 198:3 23907 285.0 334:3 387.5 72-3 98.0 127.8 161-4 198.9 240-4 2858 335.2 388.4 72-7 98.5 128:3 162-0 199.6 241 2 2866 336.0 389 3 73.1 99.0 128.8 162-6 2003 241.9 287.4 336-9 390.2 73.5 99-4 129:3 163.2 200-9 2426 288.2 3377 391'I 73-9 99.9 129-9 163.8 2016 243.3 289-0 338.6 392 t 743 100•4 130°4 | 164.4 202 2 244 1 289-8 339.4 3.93-0 747 100-8 131.0 165.0 202-9 2448 290 6 340 3 393.9 75-1 101:3 131.5 1656 2036 245 5 291.4 341.2 394-8 75-5 101.8 132 0 166.2 204.2 2463 292.2 342 0 395-8 75-9 102:3 132.6 1668 2049 247'0293-0342-9 3967 763 102.7 133•1 16754 205*6 2477 293.8 343•7 39716 7607 103.2 1336 168.0 | 206'3 2485 2946 344.6 3986

77 i

7.8 1 0-0 2-0 8.0 2 0.0 2.1 81 3 0.0 2.2 8.2 4 00 2.2 8.4 5 0.0 2.3 8.5 6 0.0 24 8.7 7 0-0 2-4 8.8 8 0.0 2.5 8.9 9 0-0 2-6 9.1 10 0.1 27 9.2 11 0:1 27 964 12 0:1 2.8 9-5 13 0-1 2-9 9-6 14 0-1 3-0 9-8 15 0.131 9.9 16 0.1 301 101 17 0-2 3-2 10-2 18 0.2 3:3

104 19 0-2 3-4 10.5 200.2 3.5 10.7 21 0-2 36 10-8 22 0:3 37 110 23 0.3 3.8 11.2 24 0.3 3.8 11.3 25 0.3 3.9

11.5 26 0-4 4.0 11.6 27 | 0-4 4.1 11.8 28 0.4 4.2 11.9 290-5 43

12:1. 30 0:5 404 123 31 0.5 4.5 12:4 320.6. 46 12.6 330-6 47 12.8 34 0.6 4:8 12.9 3507 4.9 131 36 007 5:0 133 37 007 5:1 134 38 0.85.2 13.6 39 0.8 5.3 13.8 40 0.9 5.4 14.0 41 0-9 56 14:1 42 1.0 5.7 143 43 1.0 5.8 14.5 44 1:15.9 147 45 | 60 14.8 46 1.2 6.1 15.0 47 1•26•2 15.2 48 1.3 604 15.4 49 13 6.5 15.6 50 1.4 6.6 15'8 51 1:

467 | 15.9 52 1.5 6.8 16:1 53 1.5 7.0 16.3 54 1.6 7.1 16.5 55 1.6 7.2 16.7 56 107 | 7.3 16:9 57 1.8 7.5 17.1 58 1.87.6 173 59 1.977 17.5

177 17.9 18.1 18.3 18.5 1807 18.9 19.1 19-3 19.5 1907 19.9 20-1 20:3 20-5 2007 20-9 21.2 21.4 21.6 21.8 22-0 22.3 225 22:7 22.9 23.1 23.4 23-6 23.8 24.0 24:3 24-5 24-7 25-0 25.2 25.4 25-7 25.9 26.2 26.4 26.6 26.9 27.1 27.4 27.6 27.9 28.1 28.3 28.6 28.8 29-1 29.4 29-6 29.9 30.1 30-4 30.6 30.9

1037 134.2 1686 2069 249 2 29504 345-5399-5 77.5 1042 1347 169.2 2076 2499 | 296 2 346°4 4005 77.9 1046 135:3 169.8 2083 250°7 297.0 3472 401.4 78.3 105-1 135 8 170.4 2089 251-4 | 297.8 348.1 402.3 7868 1056 136 3 171.0 209:6 252-2 298.6 349-0403:3 79 2 1061 136.9 171.6 210-3 253.0 299-4 349-8404-2 7966 106.6 13764 172-2 211.0 253 6 300-2 350 7 40501 800 107*0 138*0 172.921107 254:4 | 301•0 351.6 406•0 80-4 107.5 138.5 173-5 2123255-1 301.8 352.5 4070 80.8 108.0 139-1 1741 2130 255-9 | 302-6 3533 408.0 81-3 108.5 139 6 1747 213•7 2566 303.5 354.2 408.9 817 109.0 1402 1753 2144 257.4 304.3 355.1 409.9 82:1 109:5 1407 175.9 21501 | 258•1 30501 3560 410-8 82-5. 110.0 141.3 176.6 2158 258-9 | 305-9 356 9 4117 83.0 110-4 141:8 177.2 2164 259 6 3067 3577 412-7 8304 110-9 1424 177.8 217.1 260•4 3075 358 6 413-6 838 111'4 143:0 178.4 2178 261:1 30804 359.5 4146 84.2 111.9 143.5 179.0 218.5 261.9 309-2 360•4 415-5 847

112-4 144:1 179.7 | 219-2 262-6310-0 361-3 416.5 85-1 112:9 1446 180-3219 9 2634 310-8362-2 417.5 85.5 1134 145.2 180-9 220*6 264:1 31166 363-1 418.4 86.0 1139 145 8 181.6 221.3 264.9 312-5 364.0 419.3 86-4 114.4 1463 182.2 222:

026507 313:3 364.8 420-3 86.8 114.9 146:9 182.8 2227 26604 314:1 365 7 421.3 8703 115.4 147.5 183.5 223.4 267-2 315.0 366.6 422-2 877 115.9 148.0 184 1 224.1 267.9 315.8 367.5 423.2 881 116.4 148.6 1847 2248 26807 316 6 368°4 424.2 886 116.9 149.2 185-4 225.5 269.5 317.4 369-3 425.1 890 117.4 149.7 186.0 2262 2703 318:3 370-2426N 89.5 117.9 150-3 186.6 226.9 271.0 319 1371.1427.0 89.9 118.4 1509 187•3 | 2276 2718 31969 372.0 428:00 90'3 118.9 151:5 187.9 228:3 272-6 | 320-8 372-9429-0 90-8 119.5 152.0 188.5 229.0 27383 321 6 373.8 429-9 91.2 1200 152:6 189.2 22987274:1 322 4 374-7 430-9 91-7 120-5 153.2 189.8 230-4 1 274.9323:3 375.6 431-9 92.1 121.0 153.8 190·5231•1 275'6 324.1 376-5. 432.8 92-6 1215 154:4 191.1 231.8 276.4 325:0 377.4 433-8 93.0 122.0 154.9 191.8 232-5 277.2 325.8 378-3 434.8. 93.5 122-5 155.5 192.4 233.2 278.0 32607 379-3435.8 93.9 123.1 156.1 | 193.1 234.0 278.8 | 327.5 380 2 436 7 94.4

123.6 156-7 1937 2347 279.5 32894 381•1 43707 94.8

124:1 1573 194:4 235.4 280-3 329.2 382.0, 438-7. 95.3 124.6 157.8 195.0 236.1 281:1 330.0 382-9 439-7

125.1 158.4 19507 236.8 281.9 330 9 383.84406

31.1

9507

Table XVIII. of Mr. Baily extends to 36 minutes from the meridian.

« PreviousContinue »