********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 20 August 2020 Vol. XXXIII No. 034 ______________________________________________________________________ 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 31 December 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 no earlier * * than Autumn of 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 * * contact the USNO PAO Geoff Chester at email address directly * * 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. * * * * Until 31 Oct 2020, 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. * * * * Please note that CDDIS is reporting that as of 31 Oct 2020, all * * unencrypted ftp service will be permanently discontinued at CDDIS. * * * * 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. * * * * 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 8 14 59075 0.21516 .00009 0.38059 .00009 -0.199499 0.000024 20 8 15 59076 0.21574 .00009 0.37914 .00009 -0.198461 0.000028 20 8 16 59077 0.21624 .00009 0.37795 .00009 -0.197296 0.000021 20 8 17 59078 0.21675 .00009 0.37710 .00009 -0.196151 0.000018 20 8 18 59079 0.21710 .00009 0.37642 .00009 -0.195134 0.000017 20 8 19 59080 0.21705 .00009 0.37572 .00009 -0.194301 0.000016 20 8 20 59081 0.21670 .00009 0.37491 .00009 -0.193698 0.000013 _______________________________________________________________________ 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 = 0.1253 + 0.0846 cos A + 0.0196 sin A + 0.0056 cos C + 0.0003 sin C y = 0.3597 + 0.0167 cos A - 0.0806 sin A + 0.0003 cos C - 0.0056 sin C UT1-UTC = -0.2072 - 0.00009 (MJD - 59089) - (UT2-UT1) where A = 2*pi*(MJD-59081)/365.25 and C = 2*pi*(MJD-59081)/435. TAI-UTC(MJD 59082) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59081)**0.80 S t = 0.00025 (MJD-59081)**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 8 21 59082 0.2164 0.3738 -0.19338 2020 8 22 59083 0.2162 0.3726 -0.19326 2020 8 23 59084 0.2161 0.3712 -0.19317 2020 8 24 59085 0.2161 0.3698 -0.19297 2020 8 25 59086 0.2163 0.3685 -0.19254 2020 8 26 59087 0.2165 0.3672 -0.19186 2020 8 27 59088 0.2166 0.3659 -0.19093 2020 8 28 59089 0.2166 0.3645 -0.18984 2020 8 29 59090 0.2166 0.3632 -0.18869 2020 8 30 59091 0.2166 0.3618 -0.18760 2020 8 31 59092 0.2166 0.3603 -0.18664 2020 9 1 59093 0.2166 0.3589 -0.18584 2020 9 2 59094 0.2166 0.3574 -0.18517 2020 9 3 59095 0.2166 0.3560 -0.18466 2020 9 4 59096 0.2166 0.3546 -0.18427 2020 9 5 59097 0.2165 0.3532 -0.18399 2020 9 6 59098 0.2164 0.3518 -0.18376 2020 9 7 59099 0.2162 0.3504 -0.18354 2020 9 8 59100 0.2161 0.3490 -0.18329 2020 9 9 59101 0.2159 0.3475 -0.18298 2020 9 10 59102 0.2157 0.3461 -0.18258 2020 9 11 59103 0.2155 0.3447 -0.18210 2020 9 12 59104 0.2152 0.3433 -0.18157 2020 9 13 59105 0.2149 0.3419 -0.18104 2020 9 14 59106 0.2146 0.3405 -0.18059 2020 9 15 59107 0.2143 0.3391 -0.18032 2020 9 16 59108 0.2139 0.3377 -0.18032 2020 9 17 59109 0.2135 0.3363 -0.18059 2020 9 18 59110 0.2131 0.3349 -0.18109 2020 9 19 59111 0.2127 0.3335 -0.18169 2020 9 20 59112 0.2122 0.3321 -0.18223 2020 9 21 59113 0.2117 0.3307 -0.18257 2020 9 22 59114 0.2112 0.3294 -0.18266 2020 9 23 59115 0.2106 0.3280 -0.18250 2020 9 24 59116 0.2100 0.3267 -0.18215 2020 9 25 59117 0.2094 0.3253 -0.18170 2020 9 26 59118 0.2088 0.3240 -0.18125 2020 9 27 59119 0.2081 0.3227 -0.18086 2020 9 28 59120 0.2074 0.3214 -0.18059 2020 9 29 59121 0.2067 0.3201 -0.18047 2020 9 30 59122 0.2059 0.3188 -0.18047 2020 10 1 59123 0.2052 0.3175 -0.18059 2020 10 2 59124 0.2044 0.3162 -0.18077 2020 10 3 59125 0.2036 0.3150 -0.18097 2020 10 4 59126 0.2027 0.3137 -0.18114 2020 10 5 59127 0.2018 0.3125 -0.18123 2020 10 6 59128 0.2009 0.3113 -0.18121 2020 10 7 59129 0.2000 0.3101 -0.18108 2020 10 8 59130 0.1991 0.3089 -0.18086 2020 10 9 59131 0.1981 0.3077 -0.18059 2020 10 10 59132 0.1971 0.3065 -0.18032 2020 10 11 59133 0.1961 0.3054 -0.18013 2020 10 12 59134 0.1950 0.3042 -0.18010 2020 10 13 59135 0.1939 0.3031 -0.18033 2020 10 14 59136 0.1929 0.3020 -0.18086 2020 10 15 59137 0.1917 0.3009 -0.18169 2020 10 16 59138 0.1906 0.2999 -0.18272 2020 10 17 59139 0.1895 0.2988 -0.18381 2020 10 18 59140 0.1883 0.2978 -0.18481 2020 10 19 59141 0.1871 0.2968 -0.18558 2020 10 20 59142 0.1859 0.2958 -0.18609 2020 10 21 59143 0.1846 0.2948 -0.18636 2020 10 22 59144 0.1834 0.2938 -0.18649 2020 10 23 59145 0.1821 0.2929 -0.18657 2020 10 24 59146 0.1808 0.2920 -0.18668 2020 10 25 59147 0.1795 0.2911 -0.18689 2020 10 26 59148 0.1781 0.2902 -0.18722 2020 10 27 59149 0.1768 0.2893 -0.18767 2020 10 28 59150 0.1754 0.2885 -0.18822 2020 10 29 59151 0.1740 0.2877 -0.18884 2020 10 30 59152 0.1726 0.2869 -0.18947 2020 10 31 59153 0.1712 0.2861 -0.19006 2020 11 1 59154 0.1697 0.2853 -0.19056 2020 11 2 59155 0.1683 0.2846 -0.19094 2020 11 3 59156 0.1668 0.2839 -0.19118 2020 11 4 59157 0.1653 0.2832 -0.19129 2020 11 5 59158 0.1638 0.2825 -0.19131 2020 11 6 59159 0.1623 0.2819 -0.19128 2020 11 7 59160 0.1608 0.2813 -0.19128 2020 11 8 59161 0.1592 0.2807 -0.19139 2020 11 9 59162 0.1577 0.2801 -0.19169 2020 11 10 59163 0.1561 0.2796 -0.19223 2020 11 11 59164 0.1546 0.2790 -0.19303 2020 11 12 59165 0.1530 0.2785 -0.19405 2020 11 13 59166 0.1514 0.2781 -0.19519 2020 11 14 59167 0.1498 0.2776 -0.19629 2020 11 15 59168 0.1482 0.2772 -0.19721 2020 11 16 59169 0.1465 0.2768 -0.19787 2020 11 17 59170 0.1449 0.2764 -0.19825 2020 11 18 59171 0.1433 0.2761 -0.19842 2020 11 19 59172 0.1416 0.2758 -0.19847 2020 11 20 59173 0.1400 0.2755 -0.19853 2020 11 21 59174 0.1383 0.2752 -0.19865 2020 11 22 59175 0.1366 0.2749 -0.19888 2020 11 23 59176 0.1350 0.2747 -0.19924 2020 11 24 59177 0.1333 0.2745 -0.19969 2020 11 25 59178 0.1316 0.2744 -0.20021 2020 11 26 59179 0.1299 0.2742 -0.20075 2020 11 27 59180 0.1282 0.2741 -0.20127 2020 11 28 59181 0.1266 0.2740 -0.20170 2020 11 29 59182 0.1249 0.2740 -0.20203 2020 11 30 59183 0.1232 0.2739 -0.20222 2020 12 1 59184 0.1215 0.2739 -0.20227 2020 12 2 59185 0.1198 0.2739 -0.20220 2020 12 3 59186 0.1181 0.2740 -0.20205 2020 12 4 59187 0.1164 0.2740 -0.20190 2020 12 5 59188 0.1147 0.2741 -0.20182 2020 12 6 59189 0.1130 0.2743 -0.20188 2020 12 7 59190 0.1113 0.2744 -0.20208 2020 12 8 59191 0.1096 0.2746 -0.20252 2020 12 9 59192 0.1079 0.2748 -0.20317 2020 12 10 59193 0.1063 0.2750 -0.20397 2020 12 11 59194 0.1046 0.2753 -0.20480 2020 12 12 59195 0.1029 0.2756 -0.20553 2020 12 13 59196 0.1012 0.2759 -0.20606 2020 12 14 59197 0.0996 0.2762 -0.20633 2020 12 15 59198 0.0979 0.2766 -0.20637 2020 12 16 59199 0.0963 0.2770 -0.20627 2020 12 17 59200 0.0946 0.2774 -0.20613 2020 12 18 59201 0.0930 0.2778 -0.20604 2020 12 19 59202 0.0914 0.2783 -0.20606 2020 12 20 59203 0.0898 0.2788 -0.20621 2020 12 21 59204 0.0881 0.2793 -0.20646 2020 12 22 59205 0.0866 0.2799 -0.20678 2020 12 23 59206 0.0850 0.2804 -0.20714 2020 12 24 59207 0.0834 0.2810 -0.20747 2020 12 25 59208 0.0818 0.2816 -0.20774 2020 12 26 59209 0.0803 0.2823 -0.20791 2020 12 27 59210 0.0787 0.2830 -0.20795 2020 12 28 59211 0.0772 0.2836 -0.20785 2020 12 29 59212 0.0757 0.2844 -0.20764 2020 12 30 59213 0.0742 0.2851 -0.20734 2020 12 31 59214 0.0727 0.2859 -0.20702 2021 1 1 59215 0.0712 0.2867 -0.20676 2021 1 2 59216 0.0698 0.2875 -0.20663 2021 1 3 59217 0.0683 0.2883 -0.20671 2021 1 4 59218 0.0669 0.2892 -0.20700 2021 1 5 59219 0.0655 0.2901 -0.20751 2021 1 6 59220 0.0641 0.2910 -0.20815 2021 1 7 59221 0.0627 0.2919 -0.20885 2021 1 8 59222 0.0613 0.2929 -0.20949 2021 1 9 59223 0.0600 0.2938 -0.20996 2021 1 10 59224 0.0587 0.2948 -0.21022 2021 1 11 59225 0.0574 0.2959 -0.21026 2021 1 12 59226 0.0561 0.2969 -0.21014 2021 1 13 59227 0.0548 0.2980 -0.20997 2021 1 14 59228 0.0536 0.2990 -0.20983 2021 1 15 59229 0.0524 0.3001 -0.20980 2021 1 16 59230 0.0512 0.3013 -0.20991 2021 1 17 59231 0.0500 0.3024 -0.21016 2021 1 18 59232 0.0488 0.3036 -0.21051 2021 1 19 59233 0.0477 0.3047 -0.21091 2021 1 20 59234 0.0466 0.3059 -0.21131 2021 1 21 59235 0.0455 0.3071 -0.21166 2021 1 22 59236 0.0444 0.3084 -0.21193 2021 1 23 59237 0.0434 0.3096 -0.21207 2021 1 24 59238 0.0424 0.3109 -0.21209 2021 1 25 59239 0.0414 0.3122 -0.21199 2021 1 26 59240 0.0404 0.3135 -0.21181 2021 1 27 59241 0.0395 0.3148 -0.21160 2021 1 28 59242 0.0385 0.3161 -0.21144 2021 1 29 59243 0.0377 0.3175 -0.21141 2021 1 30 59244 0.0368 0.3188 -0.21159 2021 1 31 59245 0.0359 0.3202 -0.21201 2021 2 1 59246 0.0351 0.3216 -0.21267 2021 2 2 59247 0.0343 0.3230 -0.21348 2021 2 3 59248 0.0336 0.3244 -0.21436 2021 2 4 59249 0.0329 0.3259 -0.21518 2021 2 5 59250 0.0321 0.3273 -0.21585 2021 2 6 59251 0.0315 0.3288 -0.21631 2021 2 7 59252 0.0308 0.3302 -0.21656 2021 2 8 59253 0.0302 0.3317 -0.21665 2021 2 9 59254 0.0296 0.3332 -0.21666 2021 2 10 59255 0.0290 0.3347 -0.21668 2021 2 11 59256 0.0285 0.3362 -0.21681 2021 2 12 59257 0.0280 0.3378 -0.21708 2021 2 13 59258 0.0275 0.3393 -0.21751 2021 2 14 59259 0.0271 0.3408 -0.21806 2021 2 15 59260 0.0267 0.3424 -0.21869 2021 2 16 59261 0.0263 0.3439 -0.21934 2021 2 17 59262 0.0259 0.3455 -0.21995 2021 2 18 59263 0.0256 0.3471 -0.22048 2021 2 19 59264 0.0253 0.3486 -0.22088 2021 2 20 59265 0.0250 0.3502 -0.22113 2021 2 21 59266 0.0248 0.3518 -0.22126 2021 2 22 59267 0.0246 0.3534 -0.22127 2021 2 23 59268 0.0244 0.3550 -0.22122 2021 2 24 59269 0.0243 0.3566 -0.22117 2021 2 25 59270 0.0242 0.3582 -0.22121 2021 2 26 59271 0.0241 0.3598 -0.22142 2021 2 27 59272 0.0240 0.3614 -0.22187 2021 2 28 59273 0.0240 0.3630 -0.22259 2021 3 1 59274 0.0240 0.3646 -0.22352 2021 3 2 59275 0.0241 0.3662 -0.22458 2021 3 3 59276 0.0241 0.3679 -0.22564 2021 3 4 59277 0.0242 0.3695 -0.22658 2021 3 5 59278 0.0244 0.3711 -0.22733 2021 3 6 59279 0.0245 0.3727 -0.22788 2021 3 7 59280 0.0247 0.3743 -0.22826 2021 3 8 59281 0.0250 0.3759 -0.22856 2021 3 9 59282 0.0252 0.3775 -0.22884 2021 3 10 59283 0.0255 0.3791 -0.22918 2021 3 11 59284 0.0258 0.3807 -0.22964 2021 3 12 59285 0.0262 0.3823 -0.23024 2021 3 13 59286 0.0266 0.3839 -0.23095 2021 3 14 59287 0.0270 0.3855 -0.23174 2021 3 15 59288 0.0274 0.3871 -0.23256 2021 3 16 59289 0.0279 0.3887 -0.23337 2021 3 17 59290 0.0284 0.3903 -0.23411 2021 3 18 59291 0.0290 0.3918 -0.23476 2021 3 19 59292 0.0295 0.3934 -0.23530 2021 3 20 59293 0.0301 0.3949 -0.23571 2021 3 21 59294 0.0308 0.3965 -0.23603 2021 3 22 59295 0.0314 0.3980 -0.23630 2021 3 23 59296 0.0321 0.3996 -0.23660 2021 3 24 59297 0.0328 0.4011 -0.23699 2021 3 25 59298 0.0336 0.4026 -0.23759 2021 3 26 59299 0.0343 0.4041 -0.23846 2021 3 27 59300 0.0351 0.4056 -0.23968 2021 3 28 59301 0.0360 0.4070 -0.24124 2021 3 29 59302 0.0368 0.4085 -0.24302 2021 3 30 59303 0.0377 0.4100 -0.24486 2021 3 31 59304 0.0386 0.4114 -0.24658 2021 4 1 59305 0.0396 0.4128 -0.24807 2021 4 2 59306 0.0405 0.4142 -0.24927 2021 4 3 59307 0.0415 0.4156 -0.25024 2021 4 4 59308 0.0426 0.4170 -0.25108 2021 4 5 59309 0.0436 0.4184 -0.25191 2021 4 6 59310 0.0447 0.4197 -0.25278 2021 4 7 59311 0.0458 0.4211 -0.25373 2021 4 8 59312 0.0469 0.4224 -0.25475 2021 4 9 59313 0.0481 0.4237 -0.25583 2021 4 10 59314 0.0493 0.4250 -0.25685 2021 4 11 59315 0.0505 0.4263 -0.25783 2021 4 12 59316 0.0517 0.4275 -0.25874 2021 4 13 59317 0.0530 0.4288 -0.25954 2021 4 14 59318 0.0542 0.4300 -0.26020 2021 4 15 59319 0.0556 0.4312 -0.26063 2021 4 16 59320 0.0569 0.4324 -0.26086 2021 4 17 59321 0.0582 0.4335 -0.26092 2021 4 18 59322 0.0596 0.4347 -0.26091 2021 4 19 59323 0.0610 0.4358 -0.26088 2021 4 20 59324 0.0624 0.4369 -0.26091 2021 4 21 59325 0.0638 0.4380 -0.26118 2021 4 22 59326 0.0653 0.4390 -0.26171 2021 4 23 59327 0.0668 0.4401 -0.26247 2021 4 24 59328 0.0683 0.4411 -0.26354 2021 4 25 59329 0.0698 0.4421 -0.26488 2021 4 26 59330 0.0713 0.4430 -0.26634 2021 4 27 59331 0.0729 0.4440 -0.26774 2021 4 28 59332 0.0745 0.4449 -0.26894 2021 4 29 59333 0.0760 0.4458 -0.26985 2021 4 30 59334 0.0777 0.4467 -0.27046 2021 5 1 59335 0.0793 0.4476 -0.27084 2021 5 2 59336 0.0809 0.4484 -0.27107 2021 5 3 59337 0.0826 0.4492 -0.27128 2021 5 4 59338 0.0842 0.4500 -0.27154 2021 5 5 59339 0.0859 0.4507 -0.27187 2021 5 6 59340 0.0876 0.4515 -0.27224 2021 5 7 59341 0.0894 0.4522 -0.27264 2021 5 8 59342 0.0911 0.4528 -0.27306 2021 5 9 59343 0.0928 0.4535 -0.27342 2021 5 10 59344 0.0946 0.4541 -0.27364 2021 5 11 59345 0.0964 0.4547 -0.27375 2021 5 12 59346 0.0981 0.4553 -0.27374 2021 5 13 59347 0.0999 0.4558 -0.27359 2021 5 14 59348 0.1017 0.4564 -0.27329 2021 5 15 59349 0.1035 0.4568 -0.27284 2021 5 16 59350 0.1054 0.4573 -0.27231 2021 5 17 59351 0.1072 0.4577 -0.27175 2021 5 18 59352 0.1090 0.4582 -0.27133 2021 5 19 59353 0.1109 0.4585 -0.27110 2021 5 20 59354 0.1127 0.4589 -0.27107 2021 5 21 59355 0.1146 0.4592 -0.27126 2021 5 22 59356 0.1165 0.4595 -0.27166 2021 5 23 59357 0.1183 0.4598 -0.27224 2021 5 24 59358 0.1202 0.4600 -0.27289 2021 5 25 59359 0.1221 0.4602 -0.27346 2021 5 26 59360 0.1240 0.4604 -0.27377 2021 5 27 59361 0.1259 0.4606 -0.27377 2021 5 28 59362 0.1278 0.4607 -0.27352 2021 5 29 59363 0.1297 0.4608 -0.27308 2021 5 30 59364 0.1316 0.4609 -0.27253 2021 5 31 59365 0.1335 0.4609 -0.27197 2021 6 1 59366 0.1354 0.4609 -0.27156 2021 6 2 59367 0.1373 0.4609 -0.27132 2021 6 3 59368 0.1392 0.4608 -0.27114 2021 6 4 59369 0.1411 0.4608 -0.27100 2021 6 5 59370 0.1430 0.4607 -0.27089 2021 6 6 59371 0.1449 0.4605 -0.27072 2021 6 7 59372 0.1468 0.4604 -0.27036 2021 6 8 59373 0.1487 0.4602 -0.26987 2021 6 9 59374 0.1505 0.4599 -0.26924 2021 6 10 59375 0.1524 0.4597 -0.26852 2021 6 11 59376 0.1543 0.4594 -0.26776 2021 6 12 59377 0.1562 0.4591 -0.26690 2021 6 13 59378 0.1580 0.4588 -0.26601 2021 6 14 59379 0.1599 0.4584 -0.26514 2021 6 15 59380 0.1618 0.4580 -0.26440 2021 6 16 59381 0.1636 0.4576 -0.26386 2021 6 17 59382 0.1654 0.4571 -0.26351 2021 6 18 59383 0.1673 0.4566 -0.26334 2021 6 19 59384 0.1691 0.4561 -0.26328 2021 6 20 59385 0.1709 0.4556 -0.26325 2021 6 21 59386 0.1727 0.4550 -0.26313 2021 6 22 59387 0.1745 0.4544 -0.26283 2021 6 23 59388 0.1763 0.4538 -0.26232 2021 6 24 59389 0.1781 0.4532 -0.26150 2021 6 25 59390 0.1798 0.4525 -0.26046 2021 6 26 59391 0.1816 0.4518 -0.25929 2021 6 27 59392 0.1833 0.4510 -0.25813 2021 6 28 59393 0.1850 0.4503 -0.25709 2021 6 29 59394 0.1867 0.4495 -0.25621 2021 6 30 59395 0.1884 0.4487 -0.25551 2021 7 1 59396 0.1901 0.4479 -0.25492 2021 7 2 59397 0.1917 0.4470 -0.25433 2021 7 3 59398 0.1934 0.4461 -0.25366 2021 7 4 59399 0.1950 0.4452 -0.25289 2021 7 5 59400 0.1966 0.4442 -0.25201 2021 7 6 59401 0.1982 0.4433 -0.25103 2021 7 7 59402 0.1997 0.4423 -0.24994 2021 7 8 59403 0.2013 0.4413 -0.24873 2021 7 9 59404 0.2028 0.4402 -0.24745 2021 7 10 59405 0.2043 0.4392 -0.24611 2021 7 11 59406 0.2058 0.4381 -0.24476 2021 7 12 59407 0.2073 0.4370 -0.24345 2021 7 13 59408 0.2087 0.4358 -0.24224 2021 7 14 59409 0.2102 0.4347 -0.24119 2021 7 15 59410 0.2116 0.4335 -0.24033 2021 7 16 59411 0.2130 0.4323 -0.23964 2021 7 17 59412 0.2143 0.4311 -0.23898 2021 7 18 59413 0.2157 0.4298 -0.23828 2021 7 19 59414 0.2170 0.4286 -0.23747 2021 7 20 59415 0.2183 0.4273 -0.23646 2021 7 21 59416 0.2195 0.4260 -0.23522 2021 7 22 59417 0.2208 0.4247 -0.23378 2021 7 23 59418 0.2220 0.4233 -0.23224 2021 7 24 59419 0.2232 0.4219 -0.23072 2021 7 25 59420 0.2243 0.4206 -0.22931 2021 7 26 59421 0.2255 0.4192 -0.22812 2021 7 27 59422 0.2266 0.4177 -0.22721 2021 7 28 59423 0.2277 0.4163 -0.22645 2021 7 29 59424 0.2287 0.4148 -0.22578 2021 7 30 59425 0.2298 0.4134 -0.22513 2021 7 31 59426 0.2308 0.4119 -0.22438 2021 8 1 59427 0.2317 0.4104 -0.22345 2021 8 2 59428 0.2327 0.4088 -0.22231 2021 8 3 59429 0.2336 0.4073 -0.22101 2021 8 4 59430 0.2345 0.4058 -0.21959 2021 8 5 59431 0.2353 0.4042 -0.21807 2021 8 6 59432 0.2362 0.4026 -0.21653 2021 8 7 59433 0.2370 0.4010 -0.21505 2021 8 8 59434 0.2377 0.3994 -0.21373 2021 8 9 59435 0.2385 0.3978 -0.21263 2021 8 10 59436 0.2392 0.3962 -0.21179 2021 8 11 59437 0.2399 0.3945 -0.21125 2021 8 12 59438 0.2405 0.3929 -0.21100 2021 8 13 59439 0.2411 0.3912 -0.21088 2021 8 14 59440 0.2417 0.3895 -0.21074 2021 8 15 59441 0.2423 0.3878 -0.21050 2021 8 16 59442 0.2428 0.3861 -0.21017 2021 8 17 59443 0.2433 0.3844 -0.20964 2021 8 18 59444 0.2437 0.3827 -0.20898 2021 8 19 59445 0.2441 0.3810 -0.20830 2021 8 20 59446 0.2445 0.3793 -0.20761 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) 59059 -115.59 0.40 -10.11 0.11 59060 -115.98 0.40 -10.07 0.11 59061 -116.19 0.40 -10.07 0.11 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59059 0.175 0.161 -0.099 0.106 59060 0.166 0.161 -0.090 0.106 59061 0.156 0.161 -0.082 0.106 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).