********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 27 May 2021 Vol. XXXIV No. 021 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = -0.2 seconds beginning 02 May 2019 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * There will NOT be a leap second introduced * * in UTC at the end of June 2021 * * * * The US Naval Observatory's Rapid Service/Prediction Center website * * (maia.usno.navy.mil) must undergo modernization and has been * * offline since 24 October 2019. The expected completion of work and * * return of service will be no earlier than Summer of 2021. * * * * Although the Bulletin A makes several references to maia, the * * paragraph above supersedes any information contained in the * * Bulletin A text. * * * * Updated EOPs are available at NASA's Archive of Space Geodesy Data: * * https://cddis.nasa.gov/archive/products/iers * * ftps://gdc.cddis.eosdis.nasa.gov/products/iers * * Daily EOP data may be available here by 18:00 UTC, and Bulletin A * * EOP data may be available by 20:00 UTC. * * For additional information on accessing CDDIS, please refer to: * * https://cddis.nasa.gov/About/CDDIS_File_Download_FAQ.html * * * * Updated EOPs may also be available at IERS: * * https://datacenter.iers.org/eop.php * * EOP data files are uploaded directly from USNO to this site each * * day. For further information, contact the IERS directly. * * * * Users should verify results obtained from these sites; we cannot * * guarantee the integrity or timeliness of files provided at * * third-party sites. * * * * Questions and enquiries about EOPs can be emailed to the * * following address: * * usn.ncr.navobsydc.mbx.eopcp@mail.mil * * * * Distribution statement A. * * Approved for public release: distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 21 5 21 59355 0.14447 .00009 0.44611 .00009 -0.182489 0.000012 21 5 22 59356 0.14657 .00009 0.44615 .00009 -0.183028 0.000012 21 5 23 59357 0.14837 .00009 0.44621 .00009 -0.183717 0.000011 21 5 24 59358 0.15005 .00009 0.44599 .00009 -0.184435 0.000009 21 5 25 59359 0.15165 .00009 0.44557 .00009 -0.185038 0.000008 21 5 26 59360 0.15314 .00009 0.44517 .00009 -0.185417 0.000010 21 5 27 59361 0.15459 .00009 0.44477 .00009 -0.185539 0.000011 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.1351 + 0.0144 cos A + 0.1161 sin A + 0.0096 cos C - 0.0352 sin C y = 0.3687 + 0.1088 cos A - 0.0098 sin A - 0.0352 cos C - 0.0096 sin C UT1-UTC = -0.1553 + 0.00026 (MJD - 59369) - (UT2-UT1) where A = 2*pi*(MJD-59361)/365.25 and C = 2*pi*(MJD-59361)/435. TAI-UTC(MJD 59362) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59361)**0.80 S t = 0.00025 (MJD-59361)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2021 5 28 59362 0.1561 0.4444 -0.18544 2021 5 29 59363 0.1577 0.4440 -0.18516 2021 5 30 59364 0.1593 0.4436 -0.18478 2021 5 31 59365 0.1609 0.4433 -0.18442 2021 6 1 59366 0.1625 0.4430 -0.18418 2021 6 2 59367 0.1641 0.4426 -0.18406 2021 6 3 59368 0.1656 0.4422 -0.18404 2021 6 4 59369 0.1672 0.4418 -0.18407 2021 6 5 59370 0.1687 0.4414 -0.18410 2021 6 6 59371 0.1702 0.4410 -0.18406 2021 6 7 59372 0.1716 0.4406 -0.18391 2021 6 8 59373 0.1731 0.4402 -0.18365 2021 6 9 59374 0.1745 0.4397 -0.18323 2021 6 10 59375 0.1760 0.4392 -0.18264 2021 6 11 59376 0.1775 0.4387 -0.18190 2021 6 12 59377 0.1789 0.4381 -0.18107 2021 6 13 59378 0.1805 0.4376 -0.18023 2021 6 14 59379 0.1820 0.4370 -0.17943 2021 6 15 59380 0.1835 0.4364 -0.17873 2021 6 16 59381 0.1850 0.4357 -0.17819 2021 6 17 59382 0.1865 0.4351 -0.17782 2021 6 18 59383 0.1880 0.4344 -0.17763 2021 6 19 59384 0.1895 0.4337 -0.17757 2021 6 20 59385 0.1909 0.4329 -0.17754 2021 6 21 59386 0.1924 0.4322 -0.17744 2021 6 22 59387 0.1938 0.4314 -0.17716 2021 6 23 59388 0.1953 0.4305 -0.17662 2021 6 24 59389 0.1967 0.4297 -0.17582 2021 6 25 59390 0.1981 0.4288 -0.17482 2021 6 26 59391 0.1995 0.4279 -0.17374 2021 6 27 59392 0.2009 0.4270 -0.17270 2021 6 28 59393 0.2023 0.4260 -0.17178 2021 6 29 59394 0.2036 0.4250 -0.17101 2021 6 30 59395 0.2049 0.4240 -0.17035 2021 7 1 59396 0.2063 0.4230 -0.16976 2021 7 2 59397 0.2076 0.4220 -0.16917 2021 7 3 59398 0.2088 0.4209 -0.16853 2021 7 4 59399 0.2101 0.4198 -0.16778 2021 7 5 59400 0.2113 0.4187 -0.16689 2021 7 6 59401 0.2126 0.4176 -0.16583 2021 7 7 59402 0.2138 0.4164 -0.16459 2021 7 8 59403 0.2149 0.4153 -0.16320 2021 7 9 59404 0.2161 0.4141 -0.16169 2021 7 10 59405 0.2172 0.4129 -0.16013 2021 7 11 59406 0.2184 0.4116 -0.15860 2021 7 12 59407 0.2194 0.4104 -0.15717 2021 7 13 59408 0.2205 0.4091 -0.15591 2021 7 14 59409 0.2216 0.4078 -0.15485 2021 7 15 59410 0.2226 0.4065 -0.15399 2021 7 16 59411 0.2236 0.4052 -0.15329 2021 7 17 59412 0.2246 0.4039 -0.15269 2021 7 18 59413 0.2256 0.4025 -0.15206 2021 7 19 59414 0.2265 0.4012 -0.15131 2021 7 20 59415 0.2274 0.3998 -0.15036 2021 7 21 59416 0.2283 0.3984 -0.14918 2021 7 22 59417 0.2292 0.3970 -0.14780 2021 7 23 59418 0.2300 0.3955 -0.14632 2021 7 24 59419 0.2308 0.3941 -0.14485 2021 7 25 59420 0.2316 0.3926 -0.14350 2021 7 26 59421 0.2324 0.3912 -0.14231 2021 7 27 59422 0.2331 0.3897 -0.14129 2021 7 28 59423 0.2338 0.3882 -0.14040 2021 7 29 59424 0.2345 0.3867 -0.13958 2021 7 30 59425 0.2352 0.3852 -0.13875 2021 7 31 59426 0.2358 0.3836 -0.13785 2021 8 1 59427 0.2364 0.3821 -0.13685 2021 8 2 59428 0.2370 0.3805 -0.13571 2021 8 3 59429 0.2376 0.3789 -0.13443 2021 8 4 59430 0.2381 0.3774 -0.13302 2021 8 5 59431 0.2386 0.3758 -0.13152 2021 8 6 59432 0.2391 0.3742 -0.12999 2021 8 7 59433 0.2395 0.3726 -0.12849 2021 8 8 59434 0.2399 0.3710 -0.12710 2021 8 9 59435 0.2403 0.3693 -0.12590 2021 8 10 59436 0.2406 0.3677 -0.12493 2021 8 11 59437 0.2410 0.3661 -0.12419 2021 8 12 59438 0.2412 0.3644 -0.12365 2021 8 13 59439 0.2415 0.3628 -0.12322 2021 8 14 59440 0.2417 0.3611 -0.12280 2021 8 15 59441 0.2419 0.3594 -0.12227 2021 8 16 59442 0.2421 0.3578 -0.12155 2021 8 17 59443 0.2423 0.3561 -0.12063 2021 8 18 59444 0.2424 0.3544 -0.11952 2021 8 19 59445 0.2425 0.3527 -0.11830 2021 8 20 59446 0.2425 0.3511 -0.11708 2021 8 21 59447 0.2425 0.3494 -0.11598 2021 8 22 59448 0.2425 0.3477 -0.11505 2021 8 23 59449 0.2425 0.3460 -0.11432 2021 8 24 59450 0.2424 0.3443 -0.11376 2021 8 25 59451 0.2423 0.3426 -0.11330 2021 8 26 59452 0.2422 0.3409 -0.11287 2021 8 27 59453 0.2420 0.3392 -0.11239 2021 8 28 59454 0.2418 0.3375 -0.11181 2021 8 29 59455 0.2416 0.3358 -0.11109 2021 8 30 59456 0.2414 0.3342 -0.11023 2021 8 31 59457 0.2411 0.3325 -0.10923 2021 9 1 59458 0.2408 0.3308 -0.10813 2021 9 2 59459 0.2404 0.3291 -0.10699 2021 9 3 59460 0.2400 0.3274 -0.10588 2021 9 4 59461 0.2396 0.3258 -0.10487 2021 9 5 59462 0.2392 0.3241 -0.10403 2021 9 6 59463 0.2387 0.3224 -0.10344 2021 9 7 59464 0.2382 0.3208 -0.10312 2021 9 8 59465 0.2377 0.3191 -0.10305 2021 9 9 59466 0.2372 0.3175 -0.10314 2021 9 10 59467 0.2366 0.3159 -0.10326 2021 9 11 59468 0.2359 0.3142 -0.10330 2021 9 12 59469 0.2353 0.3126 -0.10315 2021 9 13 59470 0.2346 0.3110 -0.10281 2021 9 14 59471 0.2339 0.3094 -0.10227 2021 9 15 59472 0.2332 0.3078 -0.10159 2021 9 16 59473 0.2324 0.3062 -0.10088 2021 9 17 59474 0.2316 0.3046 -0.10026 2021 9 18 59475 0.2308 0.3031 -0.09980 2021 9 19 59476 0.2299 0.3015 -0.09953 2021 9 20 59477 0.2291 0.3000 -0.09945 2021 9 21 59478 0.2281 0.2985 -0.09950 2021 9 22 59479 0.2272 0.2970 -0.09960 2021 9 23 59480 0.2262 0.2955 -0.09968 2021 9 24 59481 0.2252 0.2940 -0.09968 2021 9 25 59482 0.2242 0.2925 -0.09954 2021 9 26 59483 0.2232 0.2910 -0.09924 2021 9 27 59484 0.2221 0.2896 -0.09880 2021 9 28 59485 0.2210 0.2882 -0.09823 2021 9 29 59486 0.2199 0.2868 -0.09758 2021 9 30 59487 0.2187 0.2854 -0.09693 2021 10 1 59488 0.2175 0.2840 -0.09634 2021 10 2 59489 0.2163 0.2826 -0.09589 2021 10 3 59490 0.2151 0.2813 -0.09565 2021 10 4 59491 0.2138 0.2799 -0.09568 2021 10 5 59492 0.2125 0.2786 -0.09598 2021 10 6 59493 0.2112 0.2773 -0.09650 2021 10 7 59494 0.2099 0.2761 -0.09712 2021 10 8 59495 0.2086 0.2748 -0.09770 2021 10 9 59496 0.2072 0.2736 -0.09810 2021 10 10 59497 0.2058 0.2724 -0.09825 2021 10 11 59498 0.2043 0.2712 -0.09815 2021 10 12 59499 0.2029 0.2700 -0.09786 2021 10 13 59500 0.2014 0.2689 -0.09751 2021 10 14 59501 0.1999 0.2677 -0.09720 2021 10 15 59502 0.1984 0.2666 -0.09701 2021 10 16 59503 0.1969 0.2655 -0.09700 2021 10 17 59504 0.1953 0.2645 -0.09717 2021 10 18 59505 0.1938 0.2634 -0.09747 2021 10 19 59506 0.1922 0.2624 -0.09784 2021 10 20 59507 0.1906 0.2614 -0.09821 2021 10 21 59508 0.1889 0.2605 -0.09851 2021 10 22 59509 0.1873 0.2595 -0.09867 2021 10 23 59510 0.1856 0.2586 -0.09868 2021 10 24 59511 0.1839 0.2577 -0.09851 2021 10 25 59512 0.1822 0.2568 -0.09820 2021 10 26 59513 0.1805 0.2560 -0.09777 2021 10 27 59514 0.1788 0.2552 -0.09730 2021 10 28 59515 0.1770 0.2544 -0.09685 2021 10 29 59516 0.1752 0.2536 -0.09650 2021 10 30 59517 0.1735 0.2529 -0.09632 2021 10 31 59518 0.1717 0.2522 -0.09636 2021 11 1 59519 0.1699 0.2515 -0.09666 2021 11 2 59520 0.1680 0.2508 -0.09720 2021 11 3 59521 0.1662 0.2502 -0.09790 2021 11 4 59522 0.1643 0.2496 -0.09864 2021 11 5 59523 0.1625 0.2490 -0.09926 2021 11 6 59524 0.1606 0.2485 -0.09964 2021 11 7 59525 0.1587 0.2480 -0.09973 2021 11 8 59526 0.1568 0.2475 -0.09959 2021 11 9 59527 0.1549 0.2470 -0.09932 2021 11 10 59528 0.1530 0.2466 -0.09903 2021 11 11 59529 0.1511 0.2462 -0.09884 2021 11 12 59530 0.1492 0.2458 -0.09881 2021 11 13 59531 0.1472 0.2455 -0.09894 2021 11 14 59532 0.1453 0.2451 -0.09919 2021 11 15 59533 0.1433 0.2449 -0.09951 2021 11 16 59534 0.1414 0.2446 -0.09984 2021 11 17 59535 0.1394 0.2444 -0.10010 2021 11 18 59536 0.1374 0.2442 -0.10024 2021 11 19 59537 0.1354 0.2440 -0.10022 2021 11 20 59538 0.1335 0.2439 -0.10003 2021 11 21 59539 0.1315 0.2438 -0.09967 2021 11 22 59540 0.1295 0.2437 -0.09918 2021 11 23 59541 0.1275 0.2436 -0.09861 2021 11 24 59542 0.1255 0.2436 -0.09804 2021 11 25 59543 0.1235 0.2436 -0.09754 2021 11 26 59544 0.1215 0.2437 -0.09716 2021 11 27 59545 0.1195 0.2438 -0.09698 2021 11 28 59546 0.1175 0.2439 -0.09703 2021 11 29 59547 0.1155 0.2440 -0.09732 2021 11 30 59548 0.1136 0.2442 -0.09780 2021 12 1 59549 0.1116 0.2444 -0.09837 2021 12 2 59550 0.1096 0.2446 -0.09891 2021 12 3 59551 0.1076 0.2449 -0.09927 2021 12 4 59552 0.1056 0.2452 -0.09937 2021 12 5 59553 0.1036 0.2455 -0.09919 2021 12 6 59554 0.1017 0.2458 -0.09883 2021 12 7 59555 0.0997 0.2462 -0.09842 2021 12 8 59556 0.0977 0.2466 -0.09808 2021 12 9 59557 0.0958 0.2471 -0.09790 2021 12 10 59558 0.0938 0.2475 -0.09791 2021 12 11 59559 0.0919 0.2480 -0.09806 2021 12 12 59560 0.0900 0.2486 -0.09830 2021 12 13 59561 0.0880 0.2491 -0.09855 2021 12 14 59562 0.0861 0.2497 -0.09874 2021 12 15 59563 0.0842 0.2503 -0.09882 2021 12 16 59564 0.0823 0.2510 -0.09873 2021 12 17 59565 0.0804 0.2516 -0.09846 2021 12 18 59566 0.0786 0.2524 -0.09800 2021 12 19 59567 0.0767 0.2531 -0.09739 2021 12 20 59568 0.0748 0.2539 -0.09668 2021 12 21 59569 0.0730 0.2546 -0.09594 2021 12 22 59570 0.0712 0.2555 -0.09524 2021 12 23 59571 0.0694 0.2563 -0.09467 2021 12 24 59572 0.0676 0.2572 -0.09427 2021 12 25 59573 0.0658 0.2581 -0.09410 2021 12 26 59574 0.0640 0.2590 -0.09414 2021 12 27 59575 0.0623 0.2600 -0.09439 2021 12 28 59576 0.0605 0.2610 -0.09476 2021 12 29 59577 0.0588 0.2620 -0.09514 2021 12 30 59578 0.0571 0.2630 -0.09539 2021 12 31 59579 0.0554 0.2641 -0.09541 2022 1 1 59580 0.0538 0.2652 -0.09522 2022 1 2 59581 0.0521 0.2663 -0.09486 2022 1 3 59582 0.0505 0.2675 -0.09443 2022 1 4 59583 0.0489 0.2686 -0.09403 2022 1 5 59584 0.0473 0.2698 -0.09375 2022 1 6 59585 0.0457 0.2711 -0.09364 2022 1 7 59586 0.0442 0.2723 -0.09366 2022 1 8 59587 0.0426 0.2736 -0.09378 2022 1 9 59588 0.0411 0.2749 -0.09397 2022 1 10 59589 0.0396 0.2762 -0.09416 2022 1 11 59590 0.0382 0.2775 -0.09426 2022 1 12 59591 0.0367 0.2789 -0.09425 2022 1 13 59592 0.0353 0.2803 -0.09413 2022 1 14 59593 0.0339 0.2817 -0.09389 2022 1 15 59594 0.0326 0.2831 -0.09349 2022 1 16 59595 0.0312 0.2846 -0.09291 2022 1 17 59596 0.0299 0.2860 -0.09221 2022 1 18 59597 0.0286 0.2875 -0.09151 2022 1 19 59598 0.0274 0.2890 -0.09089 2022 1 20 59599 0.0261 0.2906 -0.09045 2022 1 21 59600 0.0249 0.2921 -0.09012 2022 1 22 59601 0.0237 0.2937 -0.08997 2022 1 23 59602 0.0226 0.2953 -0.08993 2022 1 24 59603 0.0214 0.2969 -0.09004 2022 1 25 59604 0.0203 0.2985 -0.09013 2022 1 26 59605 0.0193 0.3002 -0.09013 2022 1 27 59606 0.0182 0.3018 -0.09001 2022 1 28 59607 0.0172 0.3035 -0.08964 2022 1 29 59608 0.0162 0.3052 -0.08903 2022 1 30 59609 0.0153 0.3069 -0.08836 2022 1 31 59610 0.0143 0.3086 -0.08770 2022 2 1 59611 0.0134 0.3104 -0.08719 2022 2 2 59612 0.0126 0.3121 -0.08688 2022 2 3 59613 0.0117 0.3139 -0.08674 2022 2 4 59614 0.0109 0.3157 -0.08670 2022 2 5 59615 0.0101 0.3175 -0.08670 2022 2 6 59616 0.0094 0.3193 -0.08672 2022 2 7 59617 0.0087 0.3211 -0.08665 2022 2 8 59618 0.0080 0.3229 -0.08648 2022 2 9 59619 0.0073 0.3247 -0.08615 2022 2 10 59620 0.0067 0.3266 -0.08578 2022 2 11 59621 0.0061 0.3285 -0.08542 2022 2 12 59622 0.0056 0.3303 -0.08493 2022 2 13 59623 0.0051 0.3322 -0.08440 2022 2 14 59624 0.0046 0.3341 -0.08385 2022 2 15 59625 0.0041 0.3360 -0.08337 2022 2 16 59626 0.0037 0.3379 -0.08303 2022 2 17 59627 0.0033 0.3398 -0.08289 2022 2 18 59628 0.0030 0.3417 -0.08299 2022 2 19 59629 0.0026 0.3436 -0.08328 2022 2 20 59630 0.0024 0.3456 -0.08377 2022 2 21 59631 0.0021 0.3475 -0.08431 2022 2 22 59632 0.0019 0.3494 -0.08483 2022 2 23 59633 0.0017 0.3514 -0.08516 2022 2 24 59634 0.0016 0.3533 -0.08523 2022 2 25 59635 0.0014 0.3553 -0.08509 2022 2 26 59636 0.0013 0.3572 -0.08479 2022 2 27 59637 0.0013 0.3592 -0.08437 2022 2 28 59638 0.0013 0.3611 -0.08403 2022 3 1 59639 0.0013 0.3631 -0.08387 2022 3 2 59640 0.0014 0.3650 -0.08393 2022 3 3 59641 0.0014 0.3670 -0.08415 2022 3 4 59642 0.0016 0.3689 -0.08450 2022 3 5 59643 0.0017 0.3709 -0.08489 2022 3 6 59644 0.0019 0.3728 -0.08516 2022 3 7 59645 0.0021 0.3748 -0.08529 2022 3 8 59646 0.0024 0.3767 -0.08525 2022 3 9 59647 0.0027 0.3787 -0.08498 2022 3 10 59648 0.0030 0.3806 -0.08455 2022 3 11 59649 0.0034 0.3825 -0.08406 2022 3 12 59650 0.0038 0.3845 -0.08359 2022 3 13 59651 0.0042 0.3864 -0.08317 2022 3 14 59652 0.0047 0.3883 -0.08289 2022 3 15 59653 0.0052 0.3902 -0.08282 2022 3 16 59654 0.0057 0.3921 -0.08296 2022 3 17 59655 0.0062 0.3940 -0.08332 2022 3 18 59656 0.0068 0.3959 -0.08390 2022 3 19 59657 0.0075 0.3978 -0.08461 2022 3 20 59658 0.0081 0.3996 -0.08534 2022 3 21 59659 0.0088 0.4015 -0.08610 2022 3 22 59660 0.0095 0.4033 -0.08673 2022 3 23 59661 0.0103 0.4052 -0.08713 2022 3 24 59662 0.0111 0.4070 -0.08732 2022 3 25 59663 0.0119 0.4088 -0.08745 2022 3 26 59664 0.0128 0.4106 -0.08757 2022 3 27 59665 0.0137 0.4124 -0.08773 2022 3 28 59666 0.0146 0.4142 -0.08809 2022 3 29 59667 0.0155 0.4159 -0.08871 2022 3 30 59668 0.0165 0.4177 -0.08961 2022 3 31 59669 0.0175 0.4194 -0.09073 2022 4 1 59670 0.0186 0.4211 -0.09189 2022 4 2 59671 0.0196 0.4228 -0.09302 2022 4 3 59672 0.0207 0.4245 -0.09402 2022 4 4 59673 0.0219 0.4262 -0.09480 2022 4 5 59674 0.0230 0.4278 -0.09541 2022 4 6 59675 0.0242 0.4295 -0.09577 2022 4 7 59676 0.0254 0.4311 -0.09591 2022 4 8 59677 0.0267 0.4327 -0.09591 2022 4 9 59678 0.0279 0.4343 -0.09577 2022 4 10 59679 0.0292 0.4358 -0.09559 2022 4 11 59680 0.0306 0.4374 -0.09546 2022 4 12 59681 0.0319 0.4389 -0.09543 2022 4 13 59682 0.0333 0.4404 -0.09563 2022 4 14 59683 0.0347 0.4419 -0.09611 2022 4 15 59684 0.0361 0.4433 -0.09679 2022 4 16 59685 0.0376 0.4448 -0.09761 2022 4 17 59686 0.0391 0.4462 -0.09845 2022 4 18 59687 0.0406 0.4476 -0.09915 2022 4 19 59688 0.0421 0.4490 -0.09958 2022 4 20 59689 0.0437 0.4503 -0.09970 2022 4 21 59690 0.0453 0.4516 -0.09961 2022 4 22 59691 0.0469 0.4529 -0.09939 2022 4 23 59692 0.0485 0.4542 -0.09911 2022 4 24 59693 0.0501 0.4554 -0.09890 2022 4 25 59694 0.0518 0.4567 -0.09881 2022 4 26 59695 0.0535 0.4579 -0.09891 2022 4 27 59696 0.0552 0.4590 -0.09916 2022 4 28 59697 0.0569 0.4602 -0.09954 2022 4 29 59698 0.0587 0.4613 -0.09999 2022 4 30 59699 0.0604 0.4624 -0.10035 2022 5 1 59700 0.0622 0.4635 -0.10058 2022 5 2 59701 0.0640 0.4645 -0.10064 2022 5 3 59702 0.0659 0.4655 -0.10049 2022 5 4 59703 0.0677 0.4665 -0.10012 2022 5 5 59704 0.0696 0.4675 -0.09961 2022 5 6 59705 0.0714 0.4684 -0.09907 2022 5 7 59706 0.0733 0.4693 -0.09853 2022 5 8 59707 0.0752 0.4702 -0.09807 2022 5 9 59708 0.0772 0.4710 -0.09776 2022 5 10 59709 0.0791 0.4718 -0.09769 2022 5 11 59710 0.0811 0.4726 -0.09785 2022 5 12 59711 0.0830 0.4734 -0.09817 2022 5 13 59712 0.0850 0.4741 -0.09864 2022 5 14 59713 0.0870 0.4748 -0.09914 2022 5 15 59714 0.0890 0.4754 -0.09953 2022 5 16 59715 0.0910 0.4761 -0.09971 2022 5 17 59716 0.0930 0.4767 -0.09963 2022 5 18 59717 0.0950 0.4772 -0.09930 2022 5 19 59718 0.0971 0.4778 -0.09880 2022 5 20 59719 0.0991 0.4783 -0.09825 2022 5 21 59720 0.1012 0.4788 -0.09789 2022 5 22 59721 0.1033 0.4792 -0.09766 2022 5 23 59722 0.1053 0.4796 -0.09761 2022 5 24 59723 0.1074 0.4800 -0.09774 2022 5 25 59724 0.1095 0.4803 -0.09788 2022 5 26 59725 0.1116 0.4807 -0.09794 2022 5 27 59726 0.1137 0.4809 -0.09788 These predictions are based on all announced leap seconds. The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).