********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 16 January 2020 Vol. XXXIII No. 003 ______________________________________________________________________ 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 on 30 June 2020 * * * * Notice of Publication Web and FTP Shutdown: * * The US Naval Observatory's Rapid Service/Prediction Center web and * * FTP sites (at maia.usno.navy.mil and toshi.nofs.navy.mil) must * * undergo modernization and have been offline since 24 October 2019. * * The expected completion of work and return of service is estimated * * as 30 April 2020. Please visit https://www.usno.navy.mil and submit * * a Requirements Form to the USNO Public Affairs Official (PAO) if * * the information you are seeking is not accessible via another * * means. If the Requirements Form is not available, please directly * * contact the USNO PAO Geoff Chester at email address * * geoff.chester@navy.mil or phone number 202 762 1438. * * * * Although the Bulletin A makes several references to maia, one * * should note that the paragraph above supercedes any information * * that is contained in the Bulletin A text. Because some users mis- * * takenly use Bulletin A (ser7.dat) instead of other formats (such as * * finals2000A.daily) for operational, machine-to-machine uses, we * * do not wish to change the spacing or text of the files. In the * * past, when spacings had changed, users had stated that any change * * to the Bulletin format outside of this remarks area had broken * * their operations. Therefore, we have not removed the old references * * to maia within the text of the Bulletin A (ser7.dat file). * * * * This shutdown has lead to the indefinite cessation of IERS * * Bulletin A distribution emails. If this occurs, current * * subscribers to the Bulletin A email distribution list may receive * * future mailings from a different address (if this service is * * restored). In the meantime, we will be unable to process email * * subscription/unsubscription requests. * * * * Currently, updated EOPs may be available at NASA's Archive of * * Space Geodesy Data anonymous FTP server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data may be uploaded here by 18:00 UTC, and * * Bulletin A EOP data may be available by 20:00 UTC. * * Users should please verify results obtained from this site; * * we cannot guarantee the integrity or timeliness of files provided * * at this mirror site. * * * * For other download options from CDDIS, such as HTTPS, please refer * * to the https://cddis.nasa.gov/About/CDDIS_File_Download_FAQ.html * * * * In addition, updated EOPs may 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. * * * * As of Bulletin A Vol. XXXIII, No. 003, 16 Jan 2020, we have fully * * incorporated the new NASA Goddard VLBI solutions -- gsf2019d.eoxy * * gsf2019d.eopi. The effect appears to be less than 0.1 mas in polar * * motion and 10 us in UT1-UTC. * * * * 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 20 1 10 58858 0.06260 .00009 0.28749 .00009 -0.179090 0.000023 20 1 11 58859 0.06184 .00009 0.28862 .00009 -0.178869 0.000020 20 1 12 58860 0.06124 .00009 0.28981 .00009 -0.178786 0.000017 20 1 13 58861 0.06086 .00009 0.29101 .00009 -0.178939 0.000020 20 1 14 58862 0.06040 .00009 0.29233 .00009 -0.179333 0.000019 20 1 15 58863 0.05953 .00009 0.29377 .00009 -0.179968 0.000020 20 1 16 58864 0.05844 .00009 0.29528 .00009 -0.180823 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 = 0.1216 - 0.0713 cos A - 0.0709 sin A + 0.0083 cos C + 0.0122 sin C y = 0.3470 - 0.0640 cos A + 0.0669 sin A + 0.0122 cos C - 0.0083 sin C UT1-UTC = -0.1797 - 0.00029 (MJD - 58872) - (UT2-UT1) where A = 2*pi*(MJD-58864)/365.25 and C = 2*pi*(MJD-58864)/435. TAI-UTC(MJD 58865) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58864)**0.80 S t = 0.00025 (MJD-58864)**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) 2020 1 17 58865 0.0573 0.2967 -0.18185 2020 1 18 58866 0.0561 0.2982 -0.18293 2020 1 19 58867 0.0550 0.2996 -0.18395 2020 1 20 58868 0.0539 0.3009 -0.18483 2020 1 21 58869 0.0529 0.3022 -0.18555 2020 1 22 58870 0.0520 0.3034 -0.18611 2020 1 23 58871 0.0511 0.3048 -0.18655 2020 1 24 58872 0.0501 0.3062 -0.18694 2020 1 25 58873 0.0492 0.3076 -0.18736 2020 1 26 58874 0.0482 0.3090 -0.18788 2020 1 27 58875 0.0473 0.3104 -0.18849 2020 1 28 58876 0.0464 0.3117 -0.18914 2020 1 29 58877 0.0455 0.3130 -0.18978 2020 1 30 58878 0.0446 0.3143 -0.19040 2020 1 31 58879 0.0438 0.3156 -0.19098 2020 2 1 58880 0.0431 0.3170 -0.19149 2020 2 2 58881 0.0424 0.3183 -0.19191 2020 2 3 58882 0.0417 0.3197 -0.19227 2020 2 4 58883 0.0411 0.3211 -0.19255 2020 2 5 58884 0.0404 0.3225 -0.19276 2020 2 6 58885 0.0398 0.3240 -0.19292 2020 2 7 58886 0.0392 0.3254 -0.19307 2020 2 8 58887 0.0387 0.3268 -0.19330 2020 2 9 58888 0.0381 0.3283 -0.19371 2020 2 10 58889 0.0377 0.3297 -0.19434 2020 2 11 58890 0.0372 0.3312 -0.19520 2020 2 12 58891 0.0368 0.3326 -0.19623 2020 2 13 58892 0.0364 0.3341 -0.19730 2020 2 14 58893 0.0360 0.3356 -0.19831 2020 2 15 58894 0.0357 0.3371 -0.19916 2020 2 16 58895 0.0353 0.3387 -0.19978 2020 2 17 58896 0.0350 0.3402 -0.20019 2020 2 18 58897 0.0348 0.3417 -0.20040 2020 2 19 58898 0.0345 0.3432 -0.20050 2020 2 20 58899 0.0343 0.3448 -0.20054 2020 2 21 58900 0.0342 0.3463 -0.20061 2020 2 22 58901 0.0340 0.3478 -0.20074 2020 2 23 58902 0.0339 0.3494 -0.20097 2020 2 24 58903 0.0338 0.3509 -0.20132 2020 2 25 58904 0.0338 0.3525 -0.20178 2020 2 26 58905 0.0337 0.3540 -0.20233 2020 2 27 58906 0.0337 0.3556 -0.20292 2020 2 28 58907 0.0338 0.3572 -0.20353 2020 2 29 58908 0.0338 0.3587 -0.20411 2020 3 1 58909 0.0339 0.3603 -0.20462 2020 3 2 58910 0.0340 0.3618 -0.20505 2020 3 3 58911 0.0342 0.3634 -0.20537 2020 3 4 58912 0.0344 0.3649 -0.20562 2020 3 5 58913 0.0346 0.3665 -0.20582 2020 3 6 58914 0.0348 0.3681 -0.20605 2020 3 7 58915 0.0351 0.3696 -0.20641 2020 3 8 58916 0.0354 0.3712 -0.20698 2020 3 9 58917 0.0358 0.3727 -0.20782 2020 3 10 58918 0.0361 0.3742 -0.20891 2020 3 11 58919 0.0365 0.3758 -0.21016 2020 3 12 58920 0.0369 0.3773 -0.21142 2020 3 13 58921 0.0374 0.3788 -0.21256 2020 3 14 58922 0.0379 0.3803 -0.21349 2020 3 15 58923 0.0384 0.3819 -0.21416 2020 3 16 58924 0.0389 0.3834 -0.21460 2020 3 17 58925 0.0395 0.3849 -0.21486 2020 3 18 58926 0.0401 0.3864 -0.21504 2020 3 19 58927 0.0407 0.3878 -0.21520 2020 3 20 58928 0.0414 0.3893 -0.21539 2020 3 21 58929 0.0421 0.3908 -0.21568 2020 3 22 58930 0.0428 0.3922 -0.21606 2020 3 23 58931 0.0435 0.3937 -0.21656 2020 3 24 58932 0.0443 0.3951 -0.21715 2020 3 25 58933 0.0451 0.3965 -0.21779 2020 3 26 58934 0.0459 0.3980 -0.21845 2020 3 27 58935 0.0467 0.3994 -0.21906 2020 3 28 58936 0.0476 0.4007 -0.21959 2020 3 29 58937 0.0485 0.4021 -0.22002 2020 3 30 58938 0.0495 0.4035 -0.22033 2020 3 31 58939 0.0504 0.4048 -0.22055 2020 4 1 58940 0.0514 0.4062 -0.22070 2020 4 2 58941 0.0524 0.4075 -0.22085 2020 4 3 58942 0.0534 0.4088 -0.22108 2020 4 4 58943 0.0545 0.4101 -0.22150 2020 4 5 58944 0.0556 0.4114 -0.22219 2020 4 6 58945 0.0567 0.4126 -0.22315 2020 4 7 58946 0.0578 0.4139 -0.22434 2020 4 8 58947 0.0590 0.4151 -0.22565 2020 4 9 58948 0.0602 0.4163 -0.22691 2020 4 10 58949 0.0614 0.4175 -0.22799 2020 4 11 58950 0.0626 0.4187 -0.22882 2020 4 12 58951 0.0638 0.4198 -0.22938 2020 4 13 58952 0.0651 0.4209 -0.22974 2020 4 14 58953 0.0664 0.4221 -0.22997 2020 4 15 58954 0.0677 0.4232 -0.23015 2020 4 16 58955 0.0691 0.4242 -0.23037 2020 4 17 58956 0.0704 0.4253 -0.23067 2020 4 18 58957 0.0718 0.4263 -0.23107 2020 4 19 58958 0.0732 0.4273 -0.23157 2020 4 20 58959 0.0746 0.4283 -0.23218 2020 4 21 58960 0.0760 0.4293 -0.23285 2020 4 22 58961 0.0775 0.4303 -0.23353 2020 4 23 58962 0.0790 0.4312 -0.23420 2020 4 24 58963 0.0805 0.4321 -0.23478 2020 4 25 58964 0.0820 0.4330 -0.23526 2020 4 26 58965 0.0835 0.4338 -0.23560 2020 4 27 58966 0.0850 0.4347 -0.23581 2020 4 28 58967 0.0866 0.4355 -0.23594 2020 4 29 58968 0.0882 0.4363 -0.23602 2020 4 30 58969 0.0898 0.4370 -0.23613 2020 5 1 58970 0.0914 0.4378 -0.23637 2020 5 2 58971 0.0930 0.4385 -0.23680 2020 5 3 58972 0.0946 0.4392 -0.23748 2020 5 4 58973 0.0963 0.4398 -0.23838 2020 5 5 58974 0.0979 0.4405 -0.23944 2020 5 6 58975 0.0996 0.4411 -0.24052 2020 5 7 58976 0.1013 0.4417 -0.24148 2020 5 8 58977 0.1030 0.4422 -0.24221 2020 5 9 58978 0.1047 0.4428 -0.24266 2020 5 10 58979 0.1064 0.4433 -0.24285 2020 5 11 58980 0.1081 0.4438 -0.24286 2020 5 12 58981 0.1098 0.4442 -0.24278 2020 5 13 58982 0.1116 0.4447 -0.24268 2020 5 14 58983 0.1133 0.4451 -0.24264 2020 5 15 58984 0.1151 0.4454 -0.24268 2020 5 16 58985 0.1169 0.4458 -0.24281 2020 5 17 58986 0.1186 0.4461 -0.24303 2020 5 18 58987 0.1204 0.4464 -0.24331 2020 5 19 58988 0.1222 0.4467 -0.24360 2020 5 20 58989 0.1240 0.4469 -0.24387 2020 5 21 58990 0.1258 0.4471 -0.24407 2020 5 22 58991 0.1276 0.4473 -0.24415 2020 5 23 58992 0.1294 0.4474 -0.24409 2020 5 24 58993 0.1312 0.4476 -0.24389 2020 5 25 58994 0.1330 0.4477 -0.24357 2020 5 26 58995 0.1348 0.4477 -0.24318 2020 5 27 58996 0.1366 0.4478 -0.24280 2020 5 28 58997 0.1384 0.4478 -0.24249 2020 5 29 58998 0.1402 0.4477 -0.24235 2020 5 30 58999 0.1421 0.4477 -0.24241 2020 5 31 59000 0.1439 0.4476 -0.24268 2020 6 1 59001 0.1457 0.4475 -0.24312 2020 6 2 59002 0.1475 0.4474 -0.24363 2020 6 3 59003 0.1493 0.4472 -0.24409 2020 6 4 59004 0.1511 0.4470 -0.24438 2020 6 5 59005 0.1529 0.4468 -0.24443 2020 6 6 59006 0.1547 0.4466 -0.24422 2020 6 7 59007 0.1565 0.4463 -0.24380 2020 6 8 59008 0.1583 0.4460 -0.24326 2020 6 9 59009 0.1601 0.4457 -0.24269 2020 6 10 59010 0.1618 0.4453 -0.24215 2020 6 11 59011 0.1636 0.4449 -0.24169 2020 6 12 59012 0.1654 0.4445 -0.24133 2020 6 13 59013 0.1671 0.4441 -0.24106 2020 6 14 59014 0.1689 0.4436 -0.24085 2020 6 15 59015 0.1706 0.4431 -0.24068 2020 6 16 59016 0.1724 0.4426 -0.24050 2020 6 17 59017 0.1741 0.4420 -0.24025 2020 6 18 59018 0.1758 0.4414 -0.23991 2020 6 19 59019 0.1775 0.4408 -0.23945 2020 6 20 59020 0.1792 0.4402 -0.23884 2020 6 21 59021 0.1808 0.4395 -0.23811 2020 6 22 59022 0.1825 0.4388 -0.23730 2020 6 23 59023 0.1842 0.4381 -0.23648 2020 6 24 59024 0.1858 0.4374 -0.23573 2020 6 25 59025 0.1874 0.4366 -0.23513 2020 6 26 59026 0.1890 0.4358 -0.23473 2020 6 27 59027 0.1906 0.4350 -0.23454 2020 6 28 59028 0.1922 0.4342 -0.23451 2020 6 29 59029 0.1938 0.4333 -0.23456 2020 6 30 59030 0.1953 0.4324 -0.23460 2020 7 1 59031 0.1968 0.4315 -0.23450 2020 7 2 59032 0.1983 0.4305 -0.23421 2020 7 3 59033 0.1998 0.4296 -0.23368 2020 7 4 59034 0.2013 0.4286 -0.23294 2020 7 5 59035 0.2028 0.4276 -0.23207 2020 7 6 59036 0.2042 0.4265 -0.23114 2020 7 7 59037 0.2056 0.4255 -0.23023 2020 7 8 59038 0.2070 0.4244 -0.22939 2020 7 9 59039 0.2084 0.4233 -0.22866 2020 7 10 59040 0.2098 0.4221 -0.22802 2020 7 11 59041 0.2111 0.4210 -0.22745 2020 7 12 59042 0.2124 0.4198 -0.22691 2020 7 13 59043 0.2137 0.4186 -0.22636 2020 7 14 59044 0.2150 0.4174 -0.22574 2020 7 15 59045 0.2162 0.4162 -0.22502 2020 7 16 59046 0.2174 0.4149 -0.22415 2020 7 17 59047 0.2186 0.4136 -0.22311 2020 7 18 59048 0.2198 0.4123 -0.22190 2020 7 19 59049 0.2210 0.4110 -0.22057 2020 7 20 59050 0.2221 0.4097 -0.21915 2020 7 21 59051 0.2232 0.4083 -0.21776 2020 7 22 59052 0.2243 0.4070 -0.21648 2020 7 23 59053 0.2253 0.4056 -0.21541 2020 7 24 59054 0.2264 0.4042 -0.21460 2020 7 25 59055 0.2274 0.4028 -0.21403 2020 7 26 59056 0.2283 0.4013 -0.21364 2020 7 27 59057 0.2293 0.3999 -0.21334 2020 7 28 59058 0.2302 0.3984 -0.21303 2020 7 29 59059 0.2311 0.3969 -0.21261 2020 7 30 59060 0.2319 0.3954 -0.21204 2020 7 31 59061 0.2328 0.3939 -0.21132 2020 8 1 59062 0.2336 0.3924 -0.21049 2020 8 2 59063 0.2344 0.3908 -0.20963 2020 8 3 59064 0.2351 0.3893 -0.20881 2020 8 4 59065 0.2358 0.3877 -0.20808 2020 8 5 59066 0.2365 0.3861 -0.20748 2020 8 6 59067 0.2372 0.3845 -0.20700 2020 8 7 59068 0.2378 0.3829 -0.20663 2020 8 8 59069 0.2384 0.3813 -0.20634 2020 8 9 59070 0.2390 0.3797 -0.20609 2020 8 10 59071 0.2395 0.3781 -0.20584 2020 8 11 59072 0.2400 0.3764 -0.20554 2020 8 12 59073 0.2405 0.3748 -0.20516 2020 8 13 59074 0.2409 0.3731 -0.20470 2020 8 14 59075 0.2413 0.3715 -0.20414 2020 8 15 59076 0.2417 0.3698 -0.20352 2020 8 16 59077 0.2421 0.3681 -0.20288 2020 8 17 59078 0.2424 0.3664 -0.20233 2020 8 18 59079 0.2427 0.3647 -0.20195 2020 8 19 59080 0.2429 0.3630 -0.20183 2020 8 20 59081 0.2432 0.3613 -0.20201 2020 8 21 59082 0.2434 0.3596 -0.20244 2020 8 22 59083 0.2435 0.3579 -0.20305 2020 8 23 59084 0.2436 0.3562 -0.20370 2020 8 24 59085 0.2437 0.3545 -0.20430 2020 8 25 59086 0.2438 0.3528 -0.20476 2020 8 26 59087 0.2438 0.3510 -0.20506 2020 8 27 59088 0.2438 0.3493 -0.20516 2020 8 28 59089 0.2438 0.3476 -0.20515 2020 8 29 59090 0.2437 0.3459 -0.20509 2020 8 30 59091 0.2436 0.3441 -0.20501 2020 8 31 59092 0.2435 0.3424 -0.20501 2020 9 1 59093 0.2433 0.3407 -0.20511 2020 9 2 59094 0.2431 0.3390 -0.20531 2020 9 3 59095 0.2429 0.3373 -0.20562 2020 9 4 59096 0.2427 0.3356 -0.20607 2020 9 5 59097 0.2424 0.3338 -0.20657 2020 9 6 59098 0.2420 0.3321 -0.20705 2020 9 7 59099 0.2417 0.3304 -0.20747 2020 9 8 59100 0.2413 0.3287 -0.20781 2020 9 9 59101 0.2409 0.3270 -0.20803 2020 9 10 59102 0.2404 0.3254 -0.20813 2020 9 11 59103 0.2399 0.3237 -0.20818 2020 9 12 59104 0.2394 0.3220 -0.20823 2020 9 13 59105 0.2389 0.3203 -0.20834 2020 9 14 59106 0.2383 0.3187 -0.20856 2020 9 15 59107 0.2377 0.3170 -0.20894 2020 9 16 59108 0.2370 0.3154 -0.20960 2020 9 17 59109 0.2364 0.3138 -0.21057 2020 9 18 59110 0.2356 0.3121 -0.21174 2020 9 19 59111 0.2349 0.3105 -0.21300 2020 9 20 59112 0.2341 0.3089 -0.21422 2020 9 21 59113 0.2334 0.3074 -0.21525 2020 9 22 59114 0.2325 0.3058 -0.21608 2020 9 23 59115 0.2317 0.3042 -0.21669 2020 9 24 59116 0.2308 0.3027 -0.21712 2020 9 25 59117 0.2299 0.3011 -0.21748 2020 9 26 59118 0.2289 0.2996 -0.21783 2020 9 27 59119 0.2280 0.2981 -0.21821 2020 9 28 59120 0.2270 0.2966 -0.21867 2020 9 29 59121 0.2259 0.2951 -0.21926 2020 9 30 59122 0.2249 0.2936 -0.22001 2020 10 1 59123 0.2238 0.2922 -0.22085 2020 10 2 59124 0.2227 0.2908 -0.22182 2020 10 3 59125 0.2215 0.2894 -0.22283 2020 10 4 59126 0.2204 0.2880 -0.22375 2020 10 5 59127 0.2192 0.2866 -0.22456 2020 10 6 59128 0.2180 0.2852 -0.22521 2020 10 7 59129 0.2167 0.2839 -0.22571 2020 10 8 59130 0.2154 0.2825 -0.22613 2020 10 9 59131 0.2142 0.2812 -0.22648 2020 10 10 59132 0.2128 0.2800 -0.22685 2020 10 11 59133 0.2115 0.2787 -0.22728 2020 10 12 59134 0.2101 0.2775 -0.22782 2020 10 13 59135 0.2087 0.2762 -0.22857 2020 10 14 59136 0.2073 0.2750 -0.22958 2020 10 15 59137 0.2059 0.2739 -0.23083 2020 10 16 59138 0.2044 0.2727 -0.23229 2020 10 17 59139 0.2029 0.2716 -0.23385 2020 10 18 59140 0.2014 0.2704 -0.23535 2020 10 19 59141 0.1999 0.2694 -0.23659 2020 10 20 59142 0.1984 0.2683 -0.23751 2020 10 21 59143 0.1968 0.2673 -0.23816 2020 10 22 59144 0.1952 0.2662 -0.23868 2020 10 23 59145 0.1936 0.2652 -0.23915 2020 10 24 59146 0.1920 0.2643 -0.23959 2020 10 25 59147 0.1904 0.2633 -0.24009 2020 10 26 59148 0.1887 0.2624 -0.24064 2020 10 27 59149 0.1870 0.2615 -0.24127 2020 10 28 59150 0.1853 0.2607 -0.24201 2020 10 29 59151 0.1836 0.2598 -0.24284 2020 10 30 59152 0.1819 0.2590 -0.24368 2020 10 31 59153 0.1802 0.2582 -0.24447 2020 11 1 59154 0.1784 0.2575 -0.24525 2020 11 2 59155 0.1766 0.2568 -0.24591 2020 11 3 59156 0.1748 0.2561 -0.24645 2020 11 4 59157 0.1730 0.2554 -0.24684 2020 11 5 59158 0.1712 0.2547 -0.24717 2020 11 6 59159 0.1694 0.2541 -0.24750 2020 11 7 59160 0.1676 0.2535 -0.24783 2020 11 8 59161 0.1657 0.2530 -0.24833 2020 11 9 59162 0.1639 0.2524 -0.24905 2020 11 10 59163 0.1620 0.2519 -0.25004 2020 11 11 59164 0.1601 0.2515 -0.25127 2020 11 12 59165 0.1582 0.2510 -0.25270 2020 11 13 59166 0.1564 0.2506 -0.25422 2020 11 14 59167 0.1544 0.2502 -0.25576 2020 11 15 59168 0.1525 0.2499 -0.25714 2020 11 16 59169 0.1506 0.2496 -0.25823 2020 11 17 59170 0.1487 0.2493 -0.25905 2020 11 18 59171 0.1468 0.2490 -0.25966 2020 11 19 59172 0.1448 0.2488 -0.26015 2020 11 20 59173 0.1429 0.2486 -0.26061 2020 11 21 59174 0.1409 0.2484 -0.26113 2020 11 22 59175 0.1390 0.2483 -0.26174 2020 11 23 59176 0.1371 0.2482 -0.26244 2020 11 24 59177 0.1351 0.2481 -0.26324 2020 11 25 59178 0.1331 0.2480 -0.26411 2020 11 26 59179 0.1312 0.2480 -0.26500 2020 11 27 59180 0.1292 0.2480 -0.26585 2020 11 28 59181 0.1273 0.2481 -0.26662 2020 11 29 59182 0.1253 0.2482 -0.26722 2020 11 30 59183 0.1234 0.2483 -0.26769 2020 12 1 59184 0.1214 0.2484 -0.26803 2020 12 2 59185 0.1195 0.2486 -0.26825 2020 12 3 59186 0.1175 0.2488 -0.26842 2020 12 4 59187 0.1156 0.2490 -0.26857 2020 12 5 59188 0.1136 0.2493 -0.26874 2020 12 6 59189 0.1117 0.2496 -0.26905 2020 12 7 59190 0.1098 0.2499 -0.26956 2020 12 8 59191 0.1078 0.2503 -0.27032 2020 12 9 59192 0.1059 0.2507 -0.27130 2020 12 10 59193 0.1040 0.2511 -0.27237 2020 12 11 59194 0.1021 0.2515 -0.27346 2020 12 12 59195 0.1002 0.2520 -0.27448 2020 12 13 59196 0.0983 0.2525 -0.27528 2020 12 14 59197 0.0964 0.2531 -0.27583 2020 12 15 59198 0.0946 0.2536 -0.27616 2020 12 16 59199 0.0927 0.2542 -0.27636 2020 12 17 59200 0.0908 0.2549 -0.27655 2020 12 18 59201 0.0890 0.2555 -0.27675 2020 12 19 59202 0.0872 0.2562 -0.27706 2020 12 20 59203 0.0854 0.2569 -0.27752 2020 12 21 59204 0.0836 0.2577 -0.27809 2020 12 22 59205 0.0818 0.2585 -0.27877 2020 12 23 59206 0.0800 0.2593 -0.27949 2020 12 24 59207 0.0782 0.2601 -0.28024 2020 12 25 59208 0.0765 0.2610 -0.28094 2020 12 26 59209 0.0748 0.2619 -0.28156 2020 12 27 59210 0.0731 0.2628 -0.28209 2020 12 28 59211 0.0714 0.2637 -0.28255 2020 12 29 59212 0.0697 0.2647 -0.28291 2020 12 30 59213 0.0680 0.2657 -0.28321 2020 12 31 59214 0.0664 0.2668 -0.28355 2021 1 1 59215 0.0648 0.2678 -0.28397 2021 1 2 59216 0.0632 0.2689 -0.28454 2021 1 3 59217 0.0616 0.2700 -0.28531 2021 1 4 59218 0.0600 0.2711 -0.28628 2021 1 5 59219 0.0585 0.2723 -0.28741 2021 1 6 59220 0.0569 0.2735 -0.28870 2021 1 7 59221 0.0554 0.2747 -0.29003 2021 1 8 59222 0.0540 0.2759 -0.29128 2021 1 9 59223 0.0525 0.2772 -0.29239 2021 1 10 59224 0.0511 0.2785 -0.29330 2021 1 11 59225 0.0497 0.2798 -0.29399 2021 1 12 59226 0.0483 0.2811 -0.29453 2021 1 13 59227 0.0469 0.2825 -0.29493 2021 1 14 59228 0.0456 0.2839 -0.29532 2021 1 15 59229 0.0443 0.2853 -0.29586 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).