********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 27 January 2022 Vol. XXXV No. 004 ______________________________________________________________________ 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 = -0.1 seconds beginning 17 July 2021 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 2022 * * * * 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 * * Due to ongoing email issues, please CC * * navobsy_eop.fct@navy.mil * * until further notice. * * * * 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 22 1 21 59600 0.03745 .00009 0.30616 .00009 -0.108247 0.000012 22 1 22 59601 0.03690 .00009 0.30734 .00009 -0.108303 0.000018 22 1 23 59602 0.03591 .00009 0.30866 .00009 -0.108473 0.000020 22 1 24 59603 0.03444 .00009 0.31008 .00009 -0.108735 0.000022 22 1 25 59604 0.03280 .00009 0.31149 .00009 -0.108995 0.000027 22 1 26 59605 0.03139 .00009 0.31280 .00009 -0.109151 0.000026 22 1 27 59606 0.03026 .00009 0.31412 .00009 -0.109038 0.000025 _______________________________________________________________________ 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 = 0.1345 - 0.0785 cos A - 0.0525 sin A - 0.0273 cos C + 0.0060 sin C y = 0.3542 - 0.0493 cos A + 0.0698 sin A + 0.0060 cos C + 0.0273 sin C UT1-UTC = -0.1133 + 0.00020 (MJD - 59614) - (UT2-UT1) where A = 2*pi*(MJD-59606)/365.25 and C = 2*pi*(MJD-59606)/435. TAI-UTC(MJD 59607) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59606)**0.80 S t = 0.00025 (MJD-59606)**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) 2022 1 28 59607 0.0293 0.3155 -0.10895 2022 1 29 59608 0.0285 0.3170 -0.10860 2022 1 30 59609 0.0278 0.3186 -0.10809 2022 1 31 59610 0.0271 0.3202 -0.10755 2022 2 1 59611 0.0263 0.3219 -0.10711 2022 2 2 59612 0.0254 0.3236 -0.10685 2022 2 3 59613 0.0246 0.3252 -0.10681 2022 2 4 59614 0.0239 0.3268 -0.10694 2022 2 5 59615 0.0231 0.3284 -0.10715 2022 2 6 59616 0.0225 0.3301 -0.10734 2022 2 7 59617 0.0220 0.3318 -0.10746 2022 2 8 59618 0.0214 0.3335 -0.10748 2022 2 9 59619 0.0209 0.3352 -0.10731 2022 2 10 59620 0.0205 0.3370 -0.10698 2022 2 11 59621 0.0200 0.3388 -0.10652 2022 2 12 59622 0.0197 0.3405 -0.10599 2022 2 13 59623 0.0194 0.3422 -0.10543 2022 2 14 59624 0.0191 0.3440 -0.10492 2022 2 15 59625 0.0189 0.3457 -0.10454 2022 2 16 59626 0.0187 0.3475 -0.10435 2022 2 17 59627 0.0185 0.3493 -0.10441 2022 2 18 59628 0.0184 0.3510 -0.10472 2022 2 19 59629 0.0182 0.3528 -0.10525 2022 2 20 59630 0.0181 0.3546 -0.10594 2022 2 21 59631 0.0181 0.3563 -0.10667 2022 2 22 59632 0.0180 0.3581 -0.10736 2022 2 23 59633 0.0181 0.3599 -0.10790 2022 2 24 59634 0.0181 0.3616 -0.10825 2022 2 25 59635 0.0182 0.3634 -0.10840 2022 2 26 59636 0.0183 0.3652 -0.10842 2022 2 27 59637 0.0184 0.3670 -0.10842 2022 2 28 59638 0.0186 0.3687 -0.10851 2022 3 1 59639 0.0188 0.3705 -0.10880 2022 3 2 59640 0.0190 0.3723 -0.10932 2022 3 3 59641 0.0193 0.3741 -0.11004 2022 3 4 59642 0.0195 0.3758 -0.11090 2022 3 5 59643 0.0199 0.3776 -0.11180 2022 3 6 59644 0.0202 0.3794 -0.11261 2022 3 7 59645 0.0206 0.3812 -0.11328 2022 3 8 59646 0.0210 0.3829 -0.11376 2022 3 9 59647 0.0214 0.3847 -0.11403 2022 3 10 59648 0.0219 0.3864 -0.11411 2022 3 11 59649 0.0224 0.3882 -0.11406 2022 3 12 59650 0.0230 0.3899 -0.11393 2022 3 13 59651 0.0236 0.3917 -0.11378 2022 3 14 59652 0.0242 0.3934 -0.11370 2022 3 15 59653 0.0248 0.3952 -0.11375 2022 3 16 59654 0.0255 0.3969 -0.11399 2022 3 17 59655 0.0262 0.3986 -0.11446 2022 3 18 59656 0.0269 0.4003 -0.11516 2022 3 19 59657 0.0277 0.4020 -0.11602 2022 3 20 59658 0.0285 0.4037 -0.11696 2022 3 21 59659 0.0293 0.4053 -0.11784 2022 3 22 59660 0.0302 0.4070 -0.11855 2022 3 23 59661 0.0310 0.4086 -0.11903 2022 3 24 59662 0.0320 0.4103 -0.11928 2022 3 25 59663 0.0329 0.4119 -0.11934 2022 3 26 59664 0.0339 0.4135 -0.11933 2022 3 27 59665 0.0349 0.4151 -0.11936 2022 3 28 59666 0.0359 0.4167 -0.11952 2022 3 29 59667 0.0370 0.4183 -0.11989 2022 3 30 59668 0.0381 0.4198 -0.12048 2022 3 31 59669 0.0392 0.4214 -0.12121 2022 4 1 59670 0.0404 0.4229 -0.12202 2022 4 2 59671 0.0416 0.4244 -0.12279 2022 4 3 59672 0.0428 0.4259 -0.12344 2022 4 4 59673 0.0440 0.4274 -0.12391 2022 4 5 59674 0.0453 0.4288 -0.12417 2022 4 6 59675 0.0466 0.4303 -0.12424 2022 4 7 59676 0.0479 0.4317 -0.12412 2022 4 8 59677 0.0492 0.4331 -0.12390 2022 4 9 59678 0.0506 0.4345 -0.12363 2022 4 10 59679 0.0520 0.4359 -0.12339 2022 4 11 59680 0.0534 0.4372 -0.12326 2022 4 12 59681 0.0548 0.4385 -0.12329 2022 4 13 59682 0.0563 0.4398 -0.12354 2022 4 14 59683 0.0578 0.4411 -0.12402 2022 4 15 59684 0.0593 0.4424 -0.12470 2022 4 16 59685 0.0608 0.4436 -0.12549 2022 4 17 59686 0.0624 0.4449 -0.12628 2022 4 18 59687 0.0640 0.4461 -0.12692 2022 4 19 59688 0.0656 0.4472 -0.12733 2022 4 20 59689 0.0672 0.4484 -0.12747 2022 4 21 59690 0.0688 0.4495 -0.12739 2022 4 22 59691 0.0705 0.4506 -0.12717 2022 4 23 59692 0.0722 0.4517 -0.12696 2022 4 24 59693 0.0739 0.4528 -0.12685 2022 4 25 59694 0.0756 0.4538 -0.12691 2022 4 26 59695 0.0774 0.4548 -0.12717 2022 4 27 59696 0.0791 0.4558 -0.12757 2022 4 28 59697 0.0809 0.4567 -0.12806 2022 4 29 59698 0.0827 0.4577 -0.12854 2022 4 30 59699 0.0845 0.4586 -0.12892 2022 5 1 59700 0.0863 0.4595 -0.12914 2022 5 2 59701 0.0882 0.4603 -0.12916 2022 5 3 59702 0.0900 0.4611 -0.12896 2022 5 4 59703 0.0919 0.4619 -0.12858 2022 5 5 59704 0.0938 0.4627 -0.12806 2022 5 6 59705 0.0957 0.4634 -0.12747 2022 5 7 59706 0.0976 0.4641 -0.12688 2022 5 8 59707 0.0995 0.4648 -0.12638 2022 5 9 59708 0.1015 0.4655 -0.12601 2022 5 10 59709 0.1034 0.4661 -0.12584 2022 5 11 59710 0.1054 0.4667 -0.12588 2022 5 12 59711 0.1074 0.4673 -0.12614 2022 5 13 59712 0.1093 0.4678 -0.12656 2022 5 14 59713 0.1113 0.4683 -0.12705 2022 5 15 59714 0.1133 0.4688 -0.12747 2022 5 16 59715 0.1153 0.4693 -0.12770 2022 5 17 59716 0.1174 0.4697 -0.12765 2022 5 18 59717 0.1194 0.4701 -0.12733 2022 5 19 59718 0.1214 0.4705 -0.12684 2022 5 20 59719 0.1235 0.4708 -0.12629 2022 5 21 59720 0.1255 0.4711 -0.12582 2022 5 22 59721 0.1275 0.4714 -0.12551 2022 5 23 59722 0.1296 0.4716 -0.12538 2022 5 24 59723 0.1317 0.4718 -0.12540 2022 5 25 59724 0.1337 0.4720 -0.12550 2022 5 26 59725 0.1358 0.4721 -0.12559 2022 5 27 59726 0.1378 0.4723 -0.12560 2022 5 28 59727 0.1399 0.4723 -0.12545 2022 5 29 59728 0.1420 0.4724 -0.12511 2022 5 30 59729 0.1440 0.4724 -0.12456 2022 5 31 59730 0.1461 0.4724 -0.12380 2022 6 1 59731 0.1482 0.4724 -0.12289 2022 6 2 59732 0.1502 0.4723 -0.12187 2022 6 3 59733 0.1523 0.4722 -0.12082 2022 6 4 59734 0.1544 0.4721 -0.11981 2022 6 5 59735 0.1564 0.4719 -0.11891 2022 6 6 59736 0.1585 0.4717 -0.11817 2022 6 7 59737 0.1605 0.4715 -0.11762 2022 6 8 59738 0.1626 0.4713 -0.11726 2022 6 9 59739 0.1646 0.4710 -0.11706 2022 6 10 59740 0.1667 0.4707 -0.11696 2022 6 11 59741 0.1687 0.4703 -0.11685 2022 6 12 59742 0.1707 0.4699 -0.11661 2022 6 13 59743 0.1727 0.4695 -0.11613 2022 6 14 59744 0.1747 0.4691 -0.11539 2022 6 15 59745 0.1767 0.4686 -0.11443 2022 6 16 59746 0.1787 0.4681 -0.11337 2022 6 17 59747 0.1807 0.4676 -0.11235 2022 6 18 59748 0.1827 0.4670 -0.11149 2022 6 19 59749 0.1846 0.4665 -0.11083 2022 6 20 59750 0.1866 0.4658 -0.11034 2022 6 21 59751 0.1885 0.4652 -0.10995 2022 6 22 59752 0.1904 0.4645 -0.10957 2022 6 23 59753 0.1924 0.4638 -0.10911 2022 6 24 59754 0.1943 0.4631 -0.10849 2022 6 25 59755 0.1961 0.4623 -0.10769 2022 6 26 59756 0.1980 0.4615 -0.10669 2022 6 27 59757 0.1999 0.4607 -0.10549 2022 6 28 59758 0.2017 0.4598 -0.10412 2022 6 29 59759 0.2035 0.4590 -0.10265 2022 6 30 59760 0.2053 0.4581 -0.10114 2022 7 1 59761 0.2071 0.4571 -0.09966 2022 7 2 59762 0.2089 0.4562 -0.09829 2022 7 3 59763 0.2106 0.4552 -0.09706 2022 7 4 59764 0.2124 0.4542 -0.09603 2022 7 5 59765 0.2141 0.4531 -0.09517 2022 7 6 59766 0.2158 0.4520 -0.09449 2022 7 7 59767 0.2175 0.4510 -0.09392 2022 7 8 59768 0.2191 0.4498 -0.09338 2022 7 9 59769 0.2208 0.4487 -0.09278 2022 7 10 59770 0.2224 0.4475 -0.09200 2022 7 11 59771 0.2240 0.4463 -0.09099 2022 7 12 59772 0.2255 0.4451 -0.08976 2022 7 13 59773 0.2271 0.4439 -0.08840 2022 7 14 59774 0.2286 0.4426 -0.08706 2022 7 15 59775 0.2301 0.4413 -0.08585 2022 7 16 59776 0.2316 0.4400 -0.08488 2022 7 17 59777 0.2330 0.4387 -0.08413 2022 7 18 59778 0.2345 0.4373 -0.08354 2022 7 19 59779 0.2359 0.4359 -0.08300 2022 7 20 59780 0.2372 0.4345 -0.08239 2022 7 21 59781 0.2386 0.4331 -0.08165 2022 7 22 59782 0.2399 0.4316 -0.08071 2022 7 23 59783 0.2412 0.4302 -0.07956 2022 7 24 59784 0.2425 0.4287 -0.07821 2022 7 25 59785 0.2437 0.4272 -0.07668 2022 7 26 59786 0.2449 0.4257 -0.07504 2022 7 27 59787 0.2461 0.4241 -0.07333 2022 7 28 59788 0.2473 0.4226 -0.07164 2022 7 29 59789 0.2484 0.4210 -0.07001 2022 7 30 59790 0.2495 0.4194 -0.06852 2022 7 31 59791 0.2506 0.4178 -0.06718 2022 8 1 59792 0.2516 0.4161 -0.06601 2022 8 2 59793 0.2527 0.4145 -0.06498 2022 8 3 59794 0.2536 0.4128 -0.06405 2022 8 4 59795 0.2546 0.4111 -0.06314 2022 8 5 59796 0.2555 0.4094 -0.06219 2022 8 6 59797 0.2564 0.4077 -0.06113 2022 8 7 59798 0.2573 0.4060 -0.05992 2022 8 8 59799 0.2581 0.4043 -0.05857 2022 8 9 59800 0.2589 0.4025 -0.05714 2022 8 10 59801 0.2596 0.4007 -0.05576 2022 8 11 59802 0.2604 0.3990 -0.05457 2022 8 12 59803 0.2611 0.3972 -0.05367 2022 8 13 59804 0.2617 0.3954 -0.05310 2022 8 14 59805 0.2624 0.3936 -0.05283 2022 8 15 59806 0.2630 0.3918 -0.05274 2022 8 16 59807 0.2635 0.3899 -0.05271 2022 8 17 59808 0.2641 0.3881 -0.05261 2022 8 18 59809 0.2646 0.3862 -0.05236 2022 8 19 59810 0.2650 0.3844 -0.05192 2022 8 20 59811 0.2655 0.3825 -0.05129 2022 8 21 59812 0.2659 0.3807 -0.05050 2022 8 22 59813 0.2662 0.3788 -0.04960 2022 8 23 59814 0.2666 0.3769 -0.04864 2022 8 24 59815 0.2669 0.3750 -0.04770 2022 8 25 59816 0.2671 0.3731 -0.04683 2022 8 26 59817 0.2673 0.3712 -0.04608 2022 8 27 59818 0.2675 0.3693 -0.04548 2022 8 28 59819 0.2677 0.3674 -0.04507 2022 8 29 59820 0.2678 0.3655 -0.04481 2022 8 30 59821 0.2679 0.3636 -0.04468 2022 8 31 59822 0.2680 0.3617 -0.04460 2022 9 1 59823 0.2680 0.3598 -0.04449 2022 9 2 59824 0.2680 0.3578 -0.04424 2022 9 3 59825 0.2679 0.3559 -0.04379 2022 9 4 59826 0.2678 0.3540 -0.04313 2022 9 5 59827 0.2677 0.3521 -0.04231 2022 9 6 59828 0.2676 0.3502 -0.04135 2022 9 7 59829 0.2674 0.3483 -0.04045 2022 9 8 59830 0.2672 0.3464 -0.03980 2022 9 9 59831 0.2669 0.3445 -0.03941 2022 9 10 59832 0.2666 0.3426 -0.03930 2022 9 11 59833 0.2663 0.3407 -0.03932 2022 9 12 59834 0.2659 0.3388 -0.03947 2022 9 13 59835 0.2655 0.3369 -0.03950 2022 9 14 59836 0.2651 0.3350 -0.03934 2022 9 15 59837 0.2647 0.3331 -0.03901 2022 9 16 59838 0.2642 0.3312 -0.03856 2022 9 17 59839 0.2636 0.3294 -0.03796 2022 9 18 59840 0.2631 0.3275 -0.03730 2022 9 19 59841 0.2625 0.3257 -0.03664 2022 9 20 59842 0.2619 0.3238 -0.03596 2022 9 21 59843 0.2612 0.3220 -0.03542 2022 9 22 59844 0.2605 0.3202 -0.03503 2022 9 23 59845 0.2598 0.3183 -0.03482 2022 9 24 59846 0.2590 0.3165 -0.03484 2022 9 25 59847 0.2582 0.3148 -0.03506 2022 9 26 59848 0.2574 0.3130 -0.03554 2022 9 27 59849 0.2566 0.3112 -0.03611 2022 9 28 59850 0.2557 0.3094 -0.03665 2022 9 29 59851 0.2548 0.3077 -0.03713 2022 9 30 59852 0.2538 0.3060 -0.03737 2022 10 1 59853 0.2528 0.3043 -0.03743 2022 10 2 59854 0.2518 0.3026 -0.03730 2022 10 3 59855 0.2508 0.3009 -0.03703 2022 10 4 59856 0.2497 0.2992 -0.03683 2022 10 5 59857 0.2486 0.2975 -0.03678 2022 10 6 59858 0.2475 0.2959 -0.03699 2022 10 7 59859 0.2464 0.2943 -0.03751 2022 10 8 59860 0.2452 0.2927 -0.03827 2022 10 9 59861 0.2440 0.2911 -0.03911 2022 10 10 59862 0.2427 0.2895 -0.03994 2022 10 11 59863 0.2415 0.2880 -0.04064 2022 10 12 59864 0.2402 0.2864 -0.04112 2022 10 13 59865 0.2389 0.2849 -0.04141 2022 10 14 59866 0.2375 0.2834 -0.04154 2022 10 15 59867 0.2361 0.2820 -0.04156 2022 10 16 59868 0.2347 0.2805 -0.04146 2022 10 17 59869 0.2333 0.2791 -0.04129 2022 10 18 59870 0.2319 0.2777 -0.04116 2022 10 19 59871 0.2304 0.2763 -0.04113 2022 10 20 59872 0.2289 0.2749 -0.04128 2022 10 21 59873 0.2274 0.2736 -0.04162 2022 10 22 59874 0.2258 0.2723 -0.04232 2022 10 23 59875 0.2243 0.2710 -0.04312 2022 10 24 59876 0.2227 0.2697 -0.04410 2022 10 25 59877 0.2211 0.2684 -0.04507 2022 10 26 59878 0.2194 0.2672 -0.04597 2022 10 27 59879 0.2178 0.2660 -0.04667 2022 10 28 59880 0.2161 0.2648 -0.04706 2022 10 29 59881 0.2144 0.2637 -0.04717 2022 10 30 59882 0.2127 0.2626 -0.04704 2022 10 31 59883 0.2110 0.2615 -0.04695 2022 11 1 59884 0.2092 0.2604 -0.04685 2022 11 2 59885 0.2075 0.2594 -0.04688 2022 11 3 59886 0.2057 0.2583 -0.04713 2022 11 4 59887 0.2039 0.2573 -0.04763 2022 11 5 59888 0.2021 0.2564 -0.04820 2022 11 6 59889 0.2002 0.2554 -0.04875 2022 11 7 59890 0.1984 0.2545 -0.04920 2022 11 8 59891 0.1965 0.2537 -0.04946 2022 11 9 59892 0.1946 0.2528 -0.04956 2022 11 10 59893 0.1928 0.2520 -0.04951 2022 11 11 59894 0.1908 0.2512 -0.04929 2022 11 12 59895 0.1889 0.2504 -0.04894 2022 11 13 59896 0.1870 0.2497 -0.04855 2022 11 14 59897 0.1851 0.2490 -0.04820 2022 11 15 59898 0.1831 0.2483 -0.04793 2022 11 16 59899 0.1811 0.2477 -0.04767 2022 11 17 59900 0.1792 0.2470 -0.04757 2022 11 18 59901 0.1772 0.2465 -0.04773 2022 11 19 59902 0.1752 0.2459 -0.04819 2022 11 20 59903 0.1732 0.2454 -0.04875 2022 11 21 59904 0.1712 0.2449 -0.04941 2022 11 22 59905 0.1692 0.2444 -0.05010 2022 11 23 59906 0.1671 0.2440 -0.05058 2022 11 24 59907 0.1651 0.2436 -0.05085 2022 11 25 59908 0.1631 0.2432 -0.05084 2022 11 26 59909 0.1610 0.2429 -0.05060 2022 11 27 59910 0.1590 0.2426 -0.05023 2022 11 28 59911 0.1569 0.2423 -0.04990 2022 11 29 59912 0.1549 0.2420 -0.04969 2022 11 30 59913 0.1528 0.2418 -0.04976 2022 12 1 59914 0.1508 0.2416 -0.05001 2022 12 2 59915 0.1487 0.2415 -0.05039 2022 12 3 59916 0.1466 0.2414 -0.05085 2022 12 4 59917 0.1446 0.2413 -0.05122 2022 12 5 59918 0.1425 0.2412 -0.05151 2022 12 6 59919 0.1405 0.2412 -0.05154 2022 12 7 59920 0.1384 0.2412 -0.05125 2022 12 8 59921 0.1364 0.2412 -0.05072 2022 12 9 59922 0.1343 0.2413 -0.05001 2022 12 10 59923 0.1323 0.2414 -0.04916 2022 12 11 59924 0.1302 0.2416 -0.04824 2022 12 12 59925 0.1282 0.2417 -0.04732 2022 12 13 59926 0.1261 0.2419 -0.04651 2022 12 14 59927 0.1241 0.2422 -0.04587 2022 12 15 59928 0.1221 0.2424 -0.04537 2022 12 16 59929 0.1200 0.2427 -0.04510 2022 12 17 59930 0.1180 0.2430 -0.04498 2022 12 18 59931 0.1160 0.2434 -0.04499 2022 12 19 59932 0.1140 0.2438 -0.04503 2022 12 20 59933 0.1120 0.2442 -0.04499 2022 12 21 59934 0.1101 0.2446 -0.04476 2022 12 22 59935 0.1081 0.2451 -0.04423 2022 12 23 59936 0.1061 0.2456 -0.04344 2022 12 24 59937 0.1042 0.2462 -0.04258 2022 12 25 59938 0.1023 0.2467 -0.04171 2022 12 26 59939 0.1003 0.2473 -0.04102 2022 12 27 59940 0.0984 0.2480 -0.04063 2022 12 28 59941 0.0965 0.2486 -0.04052 2022 12 29 59942 0.0946 0.2493 -0.04060 2022 12 30 59943 0.0928 0.2500 -0.04072 2022 12 31 59944 0.0909 0.2508 -0.04076 2023 1 1 59945 0.0891 0.2516 -0.04067 2023 1 2 59946 0.0873 0.2524 -0.04039 2023 1 3 59947 0.0854 0.2532 -0.03989 2023 1 4 59948 0.0837 0.2541 -0.03923 2023 1 5 59949 0.0819 0.2549 -0.03839 2023 1 6 59950 0.0801 0.2559 -0.03744 2023 1 7 59951 0.0784 0.2568 -0.03650 2023 1 8 59952 0.0767 0.2578 -0.03561 2023 1 9 59953 0.0750 0.2588 -0.03471 2023 1 10 59954 0.0733 0.2598 -0.03394 2023 1 11 59955 0.0716 0.2609 -0.03335 2023 1 12 59956 0.0700 0.2619 -0.03290 2023 1 13 59957 0.0684 0.2630 -0.03262 2023 1 14 59958 0.0668 0.2642 -0.03243 2023 1 15 59959 0.0652 0.2653 -0.03227 2023 1 16 59960 0.0637 0.2665 -0.03203 2023 1 17 59961 0.0621 0.2677 -0.03173 2023 1 18 59962 0.0606 0.2689 -0.03126 2023 1 19 59963 0.0591 0.2702 -0.03068 2023 1 20 59964 0.0577 0.2715 -0.03007 2023 1 21 59965 0.0563 0.2728 -0.02948 2023 1 22 59966 0.0548 0.2741 -0.02911 2023 1 23 59967 0.0535 0.2754 -0.02908 2023 1 24 59968 0.0521 0.2768 -0.02936 2023 1 25 59969 0.0508 0.2782 -0.02996 2023 1 26 59970 0.0495 0.2796 -0.03066 2023 1 27 59971 0.0482 0.2810 -0.03131 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) 59587 -109.83 0.48 -5.44 0.11 59588 -110.11 0.67 -5.05 0.08 59589 -110.36 0.67 -4.91 0.08 59590 -110.48 0.74 -5.00 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59587 0.222 0.190 -0.089 0.111 59588 0.242 0.265 -0.065 0.077 59589 0.262 0.265 -0.041 0.077 59590 0.284 0.295 -0.016 0.027 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).