********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 20 May 2021 Vol. XXXIV No. 020 ______________________________________________________________________ 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 14 59348 0.12835 .00009 0.44508 .00009 -0.183088 0.000020 21 5 15 59349 0.13033 .00009 0.44541 .00009 -0.182820 0.000015 21 5 16 59350 0.13252 .00009 0.44583 .00009 -0.182539 0.000013 21 5 17 59351 0.13485 .00009 0.44629 .00009 -0.182267 0.000017 21 5 18 59352 0.13711 .00009 0.44656 .00009 -0.182039 0.000021 21 5 19 59353 0.13946 .00009 0.44647 .00009 -0.181942 0.000021 21 5 20 59354 0.14203 .00009 0.44625 .00009 -0.182063 0.000020 _______________________________________________________________________ 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 = 0.1336 + 0.0022 cos A + 0.1148 sin A + 0.0099 cos C - 0.0334 sin C y = 0.3702 + 0.1070 cos A + 0.0008 sin A - 0.0334 cos C - 0.0099 sin C UT1-UTC = -0.1532 + 0.00026 (MJD - 59362) - (UT2-UT1) where A = 2*pi*(MJD-59354)/365.25 and C = 2*pi*(MJD-59354)/435. TAI-UTC(MJD 59355) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59354)**0.80 S t = 0.00025 (MJD-59354)**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 21 59355 0.1445 0.4461 -0.18240 2021 5 22 59356 0.1469 0.4460 -0.18294 2021 5 23 59357 0.1490 0.4460 -0.18365 2021 5 24 59358 0.1510 0.4461 -0.18442 2021 5 25 59359 0.1528 0.4460 -0.18511 2021 5 26 59360 0.1546 0.4459 -0.18556 2021 5 27 59361 0.1563 0.4457 -0.18573 2021 5 28 59362 0.1580 0.4453 -0.18564 2021 5 29 59363 0.1598 0.4450 -0.18538 2021 5 30 59364 0.1615 0.4447 -0.18508 2021 5 31 59365 0.1632 0.4444 -0.18481 2021 6 1 59366 0.1649 0.4440 -0.18464 2021 6 2 59367 0.1665 0.4437 -0.18459 2021 6 3 59368 0.1682 0.4433 -0.18463 2021 6 4 59369 0.1698 0.4428 -0.18471 2021 6 5 59370 0.1715 0.4423 -0.18476 2021 6 6 59371 0.1731 0.4418 -0.18470 2021 6 7 59372 0.1747 0.4413 -0.18449 2021 6 8 59373 0.1763 0.4408 -0.18409 2021 6 9 59374 0.1779 0.4403 -0.18347 2021 6 10 59375 0.1795 0.4397 -0.18265 2021 6 11 59376 0.1810 0.4391 -0.18167 2021 6 12 59377 0.1825 0.4385 -0.18059 2021 6 13 59378 0.1841 0.4379 -0.17948 2021 6 14 59379 0.1856 0.4372 -0.17841 2021 6 15 59380 0.1871 0.4366 -0.17745 2021 6 16 59381 0.1886 0.4359 -0.17667 2021 6 17 59382 0.1901 0.4351 -0.17610 2021 6 18 59383 0.1916 0.4344 -0.17576 2021 6 19 59384 0.1930 0.4336 -0.17557 2021 6 20 59385 0.1945 0.4328 -0.17546 2021 6 21 59386 0.1959 0.4320 -0.17529 2021 6 22 59387 0.1973 0.4312 -0.17493 2021 6 23 59388 0.1988 0.4303 -0.17433 2021 6 24 59389 0.2002 0.4295 -0.17345 2021 6 25 59390 0.2015 0.4286 -0.17238 2021 6 26 59391 0.2029 0.4276 -0.17121 2021 6 27 59392 0.2043 0.4267 -0.17006 2021 6 28 59393 0.2056 0.4257 -0.16902 2021 6 29 59394 0.2069 0.4247 -0.16810 2021 6 30 59395 0.2083 0.4237 -0.16729 2021 7 1 59396 0.2095 0.4227 -0.16654 2021 7 2 59397 0.2108 0.4216 -0.16579 2021 7 3 59398 0.2121 0.4205 -0.16498 2021 7 4 59399 0.2133 0.4194 -0.16406 2021 7 5 59400 0.2146 0.4183 -0.16300 2021 7 6 59401 0.2158 0.4172 -0.16177 2021 7 7 59402 0.2169 0.4160 -0.16039 2021 7 8 59403 0.2181 0.4148 -0.15886 2021 7 9 59404 0.2193 0.4137 -0.15723 2021 7 10 59405 0.2204 0.4124 -0.15556 2021 7 11 59406 0.2215 0.4112 -0.15394 2021 7 12 59407 0.2226 0.4099 -0.15242 2021 7 13 59408 0.2237 0.4087 -0.15107 2021 7 14 59409 0.2247 0.4074 -0.14993 2021 7 15 59410 0.2257 0.4061 -0.14899 2021 7 16 59411 0.2267 0.4047 -0.14823 2021 7 17 59412 0.2277 0.4034 -0.14757 2021 7 18 59413 0.2287 0.4020 -0.14690 2021 7 19 59414 0.2296 0.4007 -0.14613 2021 7 20 59415 0.2305 0.3993 -0.14517 2021 7 21 59416 0.2314 0.3979 -0.14399 2021 7 22 59417 0.2322 0.3964 -0.14264 2021 7 23 59418 0.2331 0.3950 -0.14119 2021 7 24 59419 0.2339 0.3935 -0.13978 2021 7 25 59420 0.2347 0.3921 -0.13849 2021 7 26 59421 0.2354 0.3906 -0.13738 2021 7 27 59422 0.2362 0.3891 -0.13644 2021 7 28 59423 0.2369 0.3876 -0.13561 2021 7 29 59424 0.2376 0.3861 -0.13483 2021 7 30 59425 0.2382 0.3845 -0.13403 2021 7 31 59426 0.2389 0.3830 -0.13315 2021 8 1 59427 0.2395 0.3814 -0.13215 2021 8 2 59428 0.2400 0.3799 -0.13100 2021 8 3 59429 0.2406 0.3783 -0.12970 2021 8 4 59430 0.2411 0.3767 -0.12826 2021 8 5 59431 0.2416 0.3751 -0.12674 2021 8 6 59432 0.2421 0.3735 -0.12517 2021 8 7 59433 0.2425 0.3719 -0.12364 2021 8 8 59434 0.2429 0.3703 -0.12221 2021 8 9 59435 0.2433 0.3686 -0.12098 2021 8 10 59436 0.2436 0.3670 -0.11998 2021 8 11 59437 0.2439 0.3653 -0.11922 2021 8 12 59438 0.2442 0.3637 -0.11867 2021 8 13 59439 0.2445 0.3620 -0.11822 2021 8 14 59440 0.2447 0.3603 -0.11779 2021 8 15 59441 0.2449 0.3587 -0.11725 2021 8 16 59442 0.2451 0.3570 -0.11654 2021 8 17 59443 0.2452 0.3553 -0.11562 2021 8 18 59444 0.2454 0.3536 -0.11451 2021 8 19 59445 0.2454 0.3519 -0.11330 2021 8 20 59446 0.2455 0.3503 -0.11209 2021 8 21 59447 0.2455 0.3486 -0.11099 2021 8 22 59448 0.2455 0.3469 -0.11008 2021 8 23 59449 0.2455 0.3452 -0.10936 2021 8 24 59450 0.2454 0.3435 -0.10882 2021 8 25 59451 0.2453 0.3418 -0.10838 2021 8 26 59452 0.2452 0.3401 -0.10797 2021 8 27 59453 0.2450 0.3384 -0.10750 2021 8 28 59454 0.2448 0.3367 -0.10694 2021 8 29 59455 0.2446 0.3350 -0.10624 2021 8 30 59456 0.2443 0.3333 -0.10540 2021 8 31 59457 0.2440 0.3316 -0.10442 2021 9 1 59458 0.2437 0.3299 -0.10334 2021 9 2 59459 0.2434 0.3282 -0.10221 2021 9 3 59460 0.2430 0.3265 -0.10111 2021 9 4 59461 0.2426 0.3248 -0.10010 2021 9 5 59462 0.2422 0.3232 -0.09927 2021 9 6 59463 0.2417 0.3215 -0.09871 2021 9 7 59464 0.2412 0.3198 -0.09842 2021 9 8 59465 0.2407 0.3182 -0.09837 2021 9 9 59466 0.2401 0.3165 -0.09847 2021 9 10 59467 0.2395 0.3149 -0.09862 2021 9 11 59468 0.2389 0.3133 -0.09867 2021 9 12 59469 0.2382 0.3116 -0.09854 2021 9 13 59470 0.2376 0.3100 -0.09818 2021 9 14 59471 0.2369 0.3084 -0.09761 2021 9 15 59472 0.2361 0.3068 -0.09691 2021 9 16 59473 0.2354 0.3052 -0.09618 2021 9 17 59474 0.2346 0.3036 -0.09553 2021 9 18 59475 0.2337 0.3020 -0.09504 2021 9 19 59476 0.2329 0.3005 -0.09475 2021 9 20 59477 0.2320 0.2989 -0.09464 2021 9 21 59478 0.2311 0.2974 -0.09467 2021 9 22 59479 0.2301 0.2959 -0.09475 2021 9 23 59480 0.2292 0.2944 -0.09482 2021 9 24 59481 0.2282 0.2929 -0.09480 2021 9 25 59482 0.2272 0.2914 -0.09465 2021 9 26 59483 0.2261 0.2899 -0.09434 2021 9 27 59484 0.2250 0.2885 -0.09388 2021 9 28 59485 0.2239 0.2870 -0.09330 2021 9 29 59486 0.2228 0.2856 -0.09265 2021 9 30 59487 0.2216 0.2842 -0.09199 2021 10 1 59488 0.2204 0.2828 -0.09139 2021 10 2 59489 0.2192 0.2815 -0.09094 2021 10 3 59490 0.2180 0.2801 -0.09070 2021 10 4 59491 0.2167 0.2788 -0.09073 2021 10 5 59492 0.2155 0.2774 -0.09102 2021 10 6 59493 0.2141 0.2761 -0.09153 2021 10 7 59494 0.2128 0.2749 -0.09214 2021 10 8 59495 0.2115 0.2736 -0.09271 2021 10 9 59496 0.2101 0.2724 -0.09309 2021 10 10 59497 0.2087 0.2711 -0.09323 2021 10 11 59498 0.2072 0.2699 -0.09311 2021 10 12 59499 0.2058 0.2687 -0.09282 2021 10 13 59500 0.2043 0.2676 -0.09244 2021 10 14 59501 0.2028 0.2665 -0.09211 2021 10 15 59502 0.2013 0.2653 -0.09190 2021 10 16 59503 0.1998 0.2642 -0.09187 2021 10 17 59504 0.1982 0.2632 -0.09201 2021 10 18 59505 0.1966 0.2621 -0.09228 2021 10 19 59506 0.1950 0.2611 -0.09263 2021 10 20 59507 0.1934 0.2601 -0.09297 2021 10 21 59508 0.1918 0.2591 -0.09325 2021 10 22 59509 0.1901 0.2582 -0.09339 2021 10 23 59510 0.1885 0.2572 -0.09338 2021 10 24 59511 0.1868 0.2563 -0.09320 2021 10 25 59512 0.1851 0.2555 -0.09286 2021 10 26 59513 0.1833 0.2546 -0.09242 2021 10 27 59514 0.1816 0.2538 -0.09194 2021 10 28 59515 0.1798 0.2530 -0.09148 2021 10 29 59516 0.1781 0.2522 -0.09112 2021 10 30 59517 0.1763 0.2514 -0.09093 2021 10 31 59518 0.1745 0.2507 -0.09096 2021 11 1 59519 0.1727 0.2500 -0.09126 2021 11 2 59520 0.1708 0.2494 -0.09180 2021 11 3 59521 0.1690 0.2487 -0.09251 2021 11 4 59522 0.1671 0.2481 -0.09325 2021 11 5 59523 0.1653 0.2475 -0.09387 2021 11 6 59524 0.1634 0.2470 -0.09425 2021 11 7 59525 0.1615 0.2464 -0.09435 2021 11 8 59526 0.1596 0.2459 -0.09421 2021 11 9 59527 0.1577 0.2455 -0.09394 2021 11 10 59528 0.1557 0.2450 -0.09367 2021 11 11 59529 0.1538 0.2446 -0.09349 2021 11 12 59530 0.1519 0.2442 -0.09346 2021 11 13 59531 0.1499 0.2439 -0.09360 2021 11 14 59532 0.1480 0.2435 -0.09386 2021 11 15 59533 0.1460 0.2432 -0.09420 2021 11 16 59534 0.1440 0.2430 -0.09454 2021 11 17 59535 0.1421 0.2427 -0.09482 2021 11 18 59536 0.1401 0.2425 -0.09499 2021 11 19 59537 0.1381 0.2423 -0.09500 2021 11 20 59538 0.1361 0.2422 -0.09484 2021 11 21 59539 0.1341 0.2421 -0.09452 2021 11 22 59540 0.1321 0.2420 -0.09408 2021 11 23 59541 0.1301 0.2419 -0.09357 2021 11 24 59542 0.1281 0.2419 -0.09306 2021 11 25 59543 0.1261 0.2419 -0.09261 2021 11 26 59544 0.1241 0.2419 -0.09230 2021 11 27 59545 0.1221 0.2420 -0.09217 2021 11 28 59546 0.1201 0.2421 -0.09226 2021 11 29 59547 0.1181 0.2422 -0.09259 2021 11 30 59548 0.1161 0.2424 -0.09311 2021 12 1 59549 0.1141 0.2426 -0.09373 2021 12 2 59550 0.1121 0.2428 -0.09432 2021 12 3 59551 0.1101 0.2430 -0.09473 2021 12 4 59552 0.1081 0.2433 -0.09489 2021 12 5 59553 0.1061 0.2436 -0.09478 2021 12 6 59554 0.1041 0.2439 -0.09448 2021 12 7 59555 0.1021 0.2443 -0.09412 2021 12 8 59556 0.1002 0.2447 -0.09382 2021 12 9 59557 0.0982 0.2451 -0.09366 2021 12 10 59558 0.0962 0.2456 -0.09366 2021 12 11 59559 0.0943 0.2461 -0.09379 2021 12 12 59560 0.0923 0.2466 -0.09400 2021 12 13 59561 0.0904 0.2471 -0.09423 2021 12 14 59562 0.0885 0.2477 -0.09440 2021 12 15 59563 0.0865 0.2483 -0.09446 2021 12 16 59564 0.0846 0.2490 -0.09437 2021 12 17 59565 0.0827 0.2496 -0.09411 2021 12 18 59566 0.0808 0.2503 -0.09369 2021 12 19 59567 0.0789 0.2510 -0.09313 2021 12 20 59568 0.0771 0.2518 -0.09248 2021 12 21 59569 0.0752 0.2526 -0.09183 2021 12 22 59570 0.0734 0.2534 -0.09120 2021 12 23 59571 0.0715 0.2542 -0.09067 2021 12 24 59572 0.0697 0.2551 -0.09028 2021 12 25 59573 0.0679 0.2560 -0.09009 2021 12 26 59574 0.0661 0.2569 -0.09013 2021 12 27 59575 0.0644 0.2578 -0.09040 2021 12 28 59576 0.0626 0.2588 -0.09082 2021 12 29 59577 0.0609 0.2598 -0.09130 2021 12 30 59578 0.0592 0.2609 -0.09173 2021 12 31 59579 0.0575 0.2619 -0.09199 2022 1 1 59580 0.0558 0.2630 -0.09201 2022 1 2 59581 0.0541 0.2641 -0.09173 2022 1 3 59582 0.0525 0.2652 -0.09128 2022 1 4 59583 0.0508 0.2664 -0.09081 2022 1 5 59584 0.0492 0.2676 -0.09048 2022 1 6 59585 0.0476 0.2688 -0.09034 2022 1 7 59586 0.0461 0.2700 -0.09029 2022 1 8 59587 0.0445 0.2713 -0.09030 2022 1 9 59588 0.0430 0.2726 -0.09027 2022 1 10 59589 0.0415 0.2739 -0.09021 2022 1 11 59590 0.0400 0.2752 -0.08999 2022 1 12 59591 0.0385 0.2765 -0.08960 2022 1 13 59592 0.0371 0.2779 -0.08908 2022 1 14 59593 0.0357 0.2793 -0.08836 2022 1 15 59594 0.0343 0.2807 -0.08746 2022 1 16 59595 0.0329 0.2822 -0.08651 2022 1 17 59596 0.0316 0.2836 -0.08555 2022 1 18 59597 0.0303 0.2851 -0.08463 2022 1 19 59598 0.0290 0.2866 -0.08381 2022 1 20 59599 0.0277 0.2881 -0.08312 2022 1 21 59600 0.0265 0.2897 -0.08256 2022 1 22 59601 0.0253 0.2912 -0.08218 2022 1 23 59602 0.0241 0.2928 -0.08202 2022 1 24 59603 0.0230 0.2944 -0.08200 2022 1 25 59604 0.0218 0.2960 -0.08205 2022 1 26 59605 0.0207 0.2976 -0.08204 2022 1 27 59606 0.0197 0.2993 -0.08201 2022 1 28 59607 0.0186 0.3010 -0.08192 2022 1 29 59608 0.0176 0.3026 -0.08162 2022 1 30 59609 0.0166 0.3043 -0.08119 2022 1 31 59610 0.0157 0.3061 -0.08073 2022 2 1 59611 0.0148 0.3078 -0.08037 2022 2 2 59612 0.0139 0.3095 -0.08019 2022 2 3 59613 0.0130 0.3113 -0.08022 2022 2 4 59614 0.0122 0.3131 -0.08042 2022 2 5 59615 0.0114 0.3148 -0.08068 2022 2 6 59616 0.0106 0.3166 -0.08099 2022 2 7 59617 0.0099 0.3184 -0.08121 2022 2 8 59618 0.0092 0.3203 -0.08132 2022 2 9 59619 0.0085 0.3221 -0.08122 2022 2 10 59620 0.0078 0.3239 -0.08090 2022 2 11 59621 0.0072 0.3258 -0.08043 2022 2 12 59622 0.0066 0.3276 -0.07983 2022 2 13 59623 0.0061 0.3295 -0.07909 2022 2 14 59624 0.0056 0.3314 -0.07837 2022 2 15 59625 0.0051 0.3333 -0.07773 2022 2 16 59626 0.0047 0.3352 -0.07725 2022 2 17 59627 0.0042 0.3371 -0.07693 2022 2 18 59628 0.0039 0.3390 -0.07685 2022 2 19 59629 0.0035 0.3409 -0.07697 2022 2 20 59630 0.0032 0.3428 -0.07718 2022 2 21 59631 0.0029 0.3447 -0.07742 2022 2 22 59632 0.0027 0.3467 -0.07761 2022 2 23 59633 0.0025 0.3486 -0.07760 2022 2 24 59634 0.0023 0.3505 -0.07739 2022 2 25 59635 0.0021 0.3525 -0.07707 2022 2 26 59636 0.0020 0.3544 -0.07668 2022 2 27 59637 0.0020 0.3564 -0.07631 2022 2 28 59638 0.0019 0.3583 -0.07611 2022 3 1 59639 0.0019 0.3602 -0.07616 2022 3 2 59640 0.0019 0.3622 -0.07645 2022 3 3 59641 0.0020 0.3641 -0.07693 2022 3 4 59642 0.0021 0.3661 -0.07754 2022 3 5 59643 0.0022 0.3680 -0.07814 2022 3 6 59644 0.0024 0.3700 -0.07861 2022 3 7 59645 0.0026 0.3719 -0.07903 2022 3 8 59646 0.0028 0.3738 -0.07930 2022 3 9 59647 0.0031 0.3758 -0.07937 2022 3 10 59648 0.0034 0.3777 -0.07930 2022 3 11 59649 0.0037 0.3796 -0.07922 2022 3 12 59650 0.0041 0.3816 -0.07912 2022 3 13 59651 0.0045 0.3835 -0.07901 2022 3 14 59652 0.0049 0.3854 -0.07905 2022 3 15 59653 0.0054 0.3873 -0.07927 2022 3 16 59654 0.0059 0.3892 -0.07977 2022 3 17 59655 0.0064 0.3911 -0.08055 2022 3 18 59656 0.0070 0.3929 -0.08154 2022 3 19 59657 0.0076 0.3948 -0.08270 2022 3 20 59658 0.0082 0.3967 -0.08392 2022 3 21 59659 0.0089 0.3985 -0.08505 2022 3 22 59660 0.0096 0.4004 -0.08605 2022 3 23 59661 0.0103 0.4022 -0.08678 2022 3 24 59662 0.0111 0.4040 -0.08721 2022 3 25 59663 0.0119 0.4058 -0.08743 2022 3 26 59664 0.0127 0.4076 -0.08748 2022 3 27 59665 0.0136 0.4094 -0.08749 2022 3 28 59666 0.0145 0.4112 -0.08760 2022 3 29 59667 0.0154 0.4130 -0.08785 2022 3 30 59668 0.0163 0.4147 -0.08833 2022 3 31 59669 0.0173 0.4164 -0.08900 2022 4 1 59670 0.0183 0.4181 -0.08975 2022 4 2 59671 0.0194 0.4198 -0.09049 2022 4 3 59672 0.0205 0.4215 -0.09113 2022 4 4 59673 0.0216 0.4232 -0.09160 2022 4 5 59674 0.0227 0.4249 -0.09182 2022 4 6 59675 0.0238 0.4265 -0.09181 2022 4 7 59676 0.0250 0.4281 -0.09165 2022 4 8 59677 0.0263 0.4297 -0.09137 2022 4 9 59678 0.0275 0.4313 -0.09101 2022 4 10 59679 0.0288 0.4328 -0.09064 2022 4 11 59680 0.0301 0.4344 -0.09033 2022 4 12 59681 0.0314 0.4359 -0.09019 2022 4 13 59682 0.0328 0.4374 -0.09026 2022 4 14 59683 0.0342 0.4389 -0.09060 2022 4 15 59684 0.0356 0.4403 -0.09124 2022 4 16 59685 0.0370 0.4418 -0.09200 2022 4 17 59686 0.0385 0.4432 -0.09279 2022 4 18 59687 0.0399 0.4446 -0.09348 2022 4 19 59688 0.0414 0.4460 -0.09394 2022 4 20 59689 0.0430 0.4473 -0.09409 2022 4 21 59690 0.0445 0.4486 -0.09403 2022 4 22 59691 0.0461 0.4499 -0.09388 2022 4 23 59692 0.0477 0.4512 -0.09374 2022 4 24 59693 0.0493 0.4525 -0.09371 2022 4 25 59694 0.0510 0.4537 -0.09387 2022 4 26 59695 0.0526 0.4549 -0.09428 2022 4 27 59696 0.0543 0.4561 -0.09486 2022 4 28 59697 0.0560 0.4572 -0.09548 2022 4 29 59698 0.0578 0.4583 -0.09608 2022 4 30 59699 0.0595 0.4594 -0.09657 2022 5 1 59700 0.0613 0.4605 -0.09684 2022 5 2 59701 0.0631 0.4615 -0.09691 2022 5 3 59702 0.0649 0.4626 -0.09678 2022 5 4 59703 0.0667 0.4636 -0.09647 2022 5 5 59704 0.0685 0.4645 -0.09604 2022 5 6 59705 0.0704 0.4654 -0.09553 2022 5 7 59706 0.0723 0.4663 -0.09512 2022 5 8 59707 0.0741 0.4672 -0.09477 2022 5 9 59708 0.0760 0.4681 -0.09454 2022 5 10 59709 0.0780 0.4689 -0.09453 2022 5 11 59710 0.0799 0.4697 -0.09467 2022 5 12 59711 0.0818 0.4704 -0.09493 2022 5 13 59712 0.0838 0.4712 -0.09532 2022 5 14 59713 0.0858 0.4719 -0.09584 2022 5 15 59714 0.0877 0.4725 -0.09642 2022 5 16 59715 0.0897 0.4732 -0.09683 2022 5 17 59716 0.0917 0.4738 -0.09709 2022 5 18 59717 0.0938 0.4743 -0.09711 2022 5 19 59718 0.0958 0.4749 -0.09695 2022 5 20 59719 0.0978 0.4754 -0.09674 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 59335 -105.71 0.86 -9.77 0.10 59336 -105.40 0.75 -9.91 0.08 59337 -105.39 0.75 -10.08 0.08 59338 -105.55 0.44 -10.13 0.01 59339 -105.64 0.49 -10.07 0.10 59340 -105.54 0.49 -9.95 0.10 59341 -105.39 0.49 -9.82 0.10 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59335 0.293 0.344 0.031 0.101 59336 0.279 0.297 0.024 0.082 59337 0.264 0.297 0.011 0.082 59338 0.249 0.175 -0.008 0.010 59339 0.237 0.194 -0.031 0.102 59340 0.227 0.194 -0.059 0.102 59341 0.219 0.194 -0.088 0.102 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).