********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 November 2020 Vol. XXXIII No. 048 ______________________________________________________________________ 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 11 20 59173 0.12626 .00009 0.28673 .00009 -0.178442 0.000011 20 11 21 59174 0.12519 .00009 0.28669 .00009 -0.178188 0.000013 20 11 22 59175 0.12452 .00009 0.28640 .00009 -0.178073 0.000016 20 11 23 59176 0.12411 .00009 0.28635 .00009 -0.178138 0.000018 20 11 24 59177 0.12350 .00009 0.28663 .00009 -0.178340 0.000020 20 11 25 59178 0.12244 .00009 0.28702 .00009 -0.178640 0.000026 20 11 26 59179 0.12085 .00009 0.28746 .00009 -0.178973 0.000026 _______________________________________________________________________ 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 = 0.1228 - 0.0097 cos A - 0.0952 sin A + 0.0118 cos C + 0.0130 sin C y = 0.3605 - 0.0877 cos A + 0.0085 sin A + 0.0130 cos C - 0.0118 sin C UT1-UTC = -0.1710 + 0.00002 (MJD - 59187) - (UT2-UT1) where A = 2*pi*(MJD-59179)/365.25 and C = 2*pi*(MJD-59179)/435. TAI-UTC(MJD 59180) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59179)**0.80 S t = 0.00025 (MJD-59179)**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 11 27 59180 0.1191 0.2877 -0.17920 2020 11 28 59181 0.1172 0.2880 -0.17933 2020 11 29 59182 0.1155 0.2881 -0.17936 2020 11 30 59183 0.1139 0.2881 -0.17926 2020 12 1 59184 0.1125 0.2881 -0.17904 2020 12 2 59185 0.1111 0.2882 -0.17870 2020 12 3 59186 0.1097 0.2885 -0.17826 2020 12 4 59187 0.1083 0.2887 -0.17782 2020 12 5 59188 0.1068 0.2890 -0.17744 2020 12 6 59189 0.1054 0.2893 -0.17723 2020 12 7 59190 0.1039 0.2896 -0.17722 2020 12 8 59191 0.1024 0.2899 -0.17742 2020 12 9 59192 0.1010 0.2901 -0.17786 2020 12 10 59193 0.0996 0.2905 -0.17845 2020 12 11 59194 0.0982 0.2908 -0.17904 2020 12 12 59195 0.0968 0.2912 -0.17950 2020 12 13 59196 0.0954 0.2916 -0.17975 2020 12 14 59197 0.0940 0.2921 -0.17975 2020 12 15 59198 0.0926 0.2925 -0.17952 2020 12 16 59199 0.0912 0.2930 -0.17915 2020 12 17 59200 0.0898 0.2935 -0.17875 2020 12 18 59201 0.0885 0.2940 -0.17839 2020 12 19 59202 0.0871 0.2945 -0.17814 2020 12 20 59203 0.0858 0.2951 -0.17802 2020 12 21 59204 0.0844 0.2957 -0.17801 2020 12 22 59205 0.0831 0.2963 -0.17806 2020 12 23 59206 0.0818 0.2969 -0.17814 2020 12 24 59207 0.0805 0.2976 -0.17821 2020 12 25 59208 0.0792 0.2982 -0.17823 2020 12 26 59209 0.0779 0.2989 -0.17816 2020 12 27 59210 0.0766 0.2996 -0.17796 2020 12 28 59211 0.0753 0.3004 -0.17761 2020 12 29 59212 0.0741 0.3011 -0.17713 2020 12 30 59213 0.0729 0.3019 -0.17655 2020 12 31 59214 0.0716 0.3027 -0.17594 2021 1 1 59215 0.0704 0.3035 -0.17537 2021 1 2 59216 0.0692 0.3044 -0.17491 2021 1 3 59217 0.0681 0.3052 -0.17464 2021 1 4 59218 0.0669 0.3061 -0.17458 2021 1 5 59219 0.0658 0.3070 -0.17471 2021 1 6 59220 0.0646 0.3080 -0.17497 2021 1 7 59221 0.0635 0.3089 -0.17527 2021 1 8 59222 0.0624 0.3099 -0.17550 2021 1 9 59223 0.0613 0.3109 -0.17558 2021 1 10 59224 0.0603 0.3119 -0.17545 2021 1 11 59225 0.0592 0.3129 -0.17509 2021 1 12 59226 0.0582 0.3139 -0.17458 2021 1 13 59227 0.0572 0.3150 -0.17400 2021 1 14 59228 0.0562 0.3161 -0.17347 2021 1 15 59229 0.0553 0.3171 -0.17304 2021 1 16 59230 0.0543 0.3183 -0.17275 2021 1 17 59231 0.0534 0.3194 -0.17259 2021 1 18 59232 0.0525 0.3205 -0.17251 2021 1 19 59233 0.0516 0.3217 -0.17248 2021 1 20 59234 0.0507 0.3229 -0.17244 2021 1 21 59235 0.0499 0.3241 -0.17234 2021 1 22 59236 0.0491 0.3253 -0.17213 2021 1 23 59237 0.0483 0.3265 -0.17181 2021 1 24 59238 0.0475 0.3277 -0.17135 2021 1 25 59239 0.0467 0.3290 -0.17079 2021 1 26 59240 0.0460 0.3302 -0.17014 2021 1 27 59241 0.0453 0.3315 -0.16946 2021 1 28 59242 0.0446 0.3328 -0.16883 2021 1 29 59243 0.0440 0.3341 -0.16834 2021 1 30 59244 0.0433 0.3354 -0.16807 2021 1 31 59245 0.0427 0.3368 -0.16805 2021 2 1 59246 0.0422 0.3381 -0.16828 2021 2 2 59247 0.0416 0.3394 -0.16869 2021 2 3 59248 0.0411 0.3408 -0.16917 2021 2 4 59249 0.0406 0.3422 -0.16961 2021 2 5 59250 0.0401 0.3436 -0.16991 2021 2 6 59251 0.0396 0.3450 -0.17000 2021 2 7 59252 0.0392 0.3464 -0.16988 2021 2 8 59253 0.0388 0.3478 -0.16960 2021 2 9 59254 0.0384 0.3492 -0.16924 2021 2 10 59255 0.0381 0.3506 -0.16889 2021 2 11 59256 0.0377 0.3520 -0.16865 2021 2 12 59257 0.0374 0.3535 -0.16856 2021 2 13 59258 0.0372 0.3549 -0.16861 2021 2 14 59259 0.0369 0.3564 -0.16879 2021 2 15 59260 0.0367 0.3578 -0.16905 2021 2 16 59261 0.0365 0.3593 -0.16933 2021 2 17 59262 0.0364 0.3608 -0.16957 2021 2 18 59263 0.0362 0.3623 -0.16973 2021 2 19 59264 0.0361 0.3637 -0.16978 2021 2 20 59265 0.0361 0.3652 -0.16970 2021 2 21 59266 0.0360 0.3667 -0.16949 2021 2 22 59267 0.0360 0.3682 -0.16920 2021 2 23 59268 0.0360 0.3697 -0.16886 2021 2 24 59269 0.0360 0.3712 -0.16855 2021 2 25 59270 0.0361 0.3727 -0.16835 2021 2 26 59271 0.0362 0.3742 -0.16835 2021 2 27 59272 0.0363 0.3757 -0.16861 2021 2 28 59273 0.0365 0.3772 -0.16915 2021 3 1 59274 0.0367 0.3787 -0.16990 2021 3 2 59275 0.0369 0.3801 -0.17076 2021 3 3 59276 0.0371 0.3816 -0.17159 2021 3 4 59277 0.0374 0.3831 -0.17227 2021 3 5 59278 0.0377 0.3846 -0.17274 2021 3 6 59279 0.0380 0.3861 -0.17298 2021 3 7 59280 0.0383 0.3876 -0.17303 2021 3 8 59281 0.0387 0.3891 -0.17298 2021 3 9 59282 0.0391 0.3905 -0.17293 2021 3 10 59283 0.0396 0.3920 -0.17297 2021 3 11 59284 0.0400 0.3935 -0.17315 2021 3 12 59285 0.0405 0.3949 -0.17350 2021 3 13 59286 0.0410 0.3964 -0.17400 2021 3 14 59287 0.0416 0.3978 -0.17461 2021 3 15 59288 0.0422 0.3993 -0.17521 2021 3 16 59289 0.0428 0.4007 -0.17579 2021 3 17 59290 0.0434 0.4021 -0.17630 2021 3 18 59291 0.0440 0.4036 -0.17669 2021 3 19 59292 0.0447 0.4050 -0.17695 2021 3 20 59293 0.0454 0.4064 -0.17707 2021 3 21 59294 0.0462 0.4078 -0.17707 2021 3 22 59295 0.0470 0.4091 -0.17701 2021 3 23 59296 0.0477 0.4105 -0.17694 2021 3 24 59297 0.0486 0.4119 -0.17693 2021 3 25 59298 0.0494 0.4132 -0.17709 2021 3 26 59299 0.0503 0.4146 -0.17748 2021 3 27 59300 0.0512 0.4159 -0.17816 2021 3 28 59301 0.0521 0.4172 -0.17910 2021 3 29 59302 0.0531 0.4185 -0.18022 2021 3 30 59303 0.0540 0.4198 -0.18137 2021 3 31 59304 0.0550 0.4210 -0.18240 2021 4 1 59305 0.0561 0.4223 -0.18320 2021 4 2 59306 0.0571 0.4236 -0.18373 2021 4 3 59307 0.0582 0.4248 -0.18401 2021 4 4 59308 0.0593 0.4260 -0.18413 2021 4 5 59309 0.0604 0.4272 -0.18420 2021 4 6 59310 0.0615 0.4284 -0.18431 2021 4 7 59311 0.0627 0.4295 -0.18453 2021 4 8 59312 0.0639 0.4307 -0.18488 2021 4 9 59313 0.0651 0.4318 -0.18537 2021 4 10 59314 0.0663 0.4329 -0.18596 2021 4 11 59315 0.0676 0.4340 -0.18660 2021 4 12 59316 0.0689 0.4351 -0.18723 2021 4 13 59317 0.0702 0.4362 -0.18779 2021 4 14 59318 0.0715 0.4372 -0.18824 2021 4 15 59319 0.0728 0.4382 -0.18854 2021 4 16 59320 0.0742 0.4392 -0.18868 2021 4 17 59321 0.0756 0.4402 -0.18867 2021 4 18 59322 0.0770 0.4412 -0.18857 2021 4 19 59323 0.0784 0.4421 -0.18841 2021 4 20 59324 0.0798 0.4430 -0.18829 2021 4 21 59325 0.0813 0.4439 -0.18826 2021 4 22 59326 0.0828 0.4448 -0.18842 2021 4 23 59327 0.0843 0.4457 -0.18884 2021 4 24 59328 0.0858 0.4465 -0.18952 2021 4 25 59329 0.0873 0.4473 -0.19043 2021 4 26 59330 0.0888 0.4481 -0.19145 2021 4 27 59331 0.0904 0.4488 -0.19242 2021 4 28 59332 0.0920 0.4496 -0.19320 2021 4 29 59333 0.0935 0.4503 -0.19370 2021 4 30 59334 0.0951 0.4510 -0.19390 2021 5 1 59335 0.0968 0.4517 -0.19389 2021 5 2 59336 0.0984 0.4523 -0.19376 2021 5 3 59337 0.1000 0.4529 -0.19364 2021 5 4 59338 0.1017 0.4535 -0.19360 2021 5 5 59339 0.1034 0.4541 -0.19367 2021 5 6 59340 0.1050 0.4546 -0.19387 2021 5 7 59341 0.1067 0.4552 -0.19415 2021 5 8 59342 0.1084 0.4556 -0.19449 2021 5 9 59343 0.1101 0.4561 -0.19481 2021 5 10 59344 0.1119 0.4566 -0.19507 2021 5 11 59345 0.1136 0.4570 -0.19522 2021 5 12 59346 0.1153 0.4574 -0.19521 2021 5 13 59347 0.1171 0.4577 -0.19503 2021 5 14 59348 0.1189 0.4581 -0.19469 2021 5 15 59349 0.1206 0.4584 -0.19422 2021 5 16 59350 0.1224 0.4586 -0.19368 2021 5 17 59351 0.1242 0.4589 -0.19312 2021 5 18 59352 0.1260 0.4591 -0.19262 2021 5 19 59353 0.1278 0.4593 -0.19226 2021 5 20 59354 0.1295 0.4595 -0.19209 2021 5 21 59355 0.1313 0.4596 -0.19216 2021 5 22 59356 0.1332 0.4598 -0.19246 2021 5 23 59357 0.1350 0.4599 -0.19290 2021 5 24 59358 0.1368 0.4599 -0.19337 2021 5 25 59359 0.1386 0.4600 -0.19370 2021 5 26 59360 0.1404 0.4600 -0.19378 2021 5 27 59361 0.1422 0.4599 -0.19355 2021 5 28 59362 0.1440 0.4599 -0.19303 2021 5 29 59363 0.1459 0.4598 -0.19232 2021 5 30 59364 0.1477 0.4597 -0.19155 2021 5 31 59365 0.1495 0.4596 -0.19080 2021 6 1 59366 0.1513 0.4594 -0.19013 2021 6 2 59367 0.1531 0.4592 -0.18955 2021 6 3 59368 0.1549 0.4590 -0.18905 2021 6 4 59369 0.1567 0.4588 -0.18858 2021 6 5 59370 0.1585 0.4585 -0.18811 2021 6 6 59371 0.1604 0.4582 -0.18759 2021 6 7 59372 0.1621 0.4578 -0.18700 2021 6 8 59373 0.1639 0.4575 -0.18630 2021 6 9 59374 0.1657 0.4571 -0.18550 2021 6 10 59375 0.1675 0.4567 -0.18458 2021 6 11 59376 0.1693 0.4562 -0.18359 2021 6 12 59377 0.1711 0.4558 -0.18256 2021 6 13 59378 0.1728 0.4553 -0.18157 2021 6 14 59379 0.1746 0.4548 -0.18069 2021 6 15 59380 0.1763 0.4542 -0.17997 2021 6 16 59381 0.1781 0.4536 -0.17949 2021 6 17 59382 0.1798 0.4530 -0.17925 2021 6 18 59383 0.1815 0.4524 -0.17927 2021 6 19 59384 0.1832 0.4517 -0.17948 2021 6 20 59385 0.1849 0.4510 -0.17979 2021 6 21 59386 0.1866 0.4503 -0.18006 2021 6 22 59387 0.1883 0.4496 -0.18018 2021 6 23 59388 0.1899 0.4488 -0.18005 2021 6 24 59389 0.1916 0.4480 -0.17965 2021 6 25 59390 0.1932 0.4472 -0.17906 2021 6 26 59391 0.1948 0.4464 -0.17838 2021 6 27 59392 0.1964 0.4455 -0.17773 2021 6 28 59393 0.1980 0.4446 -0.17721 2021 6 29 59394 0.1996 0.4437 -0.17684 2021 6 30 59395 0.2011 0.4427 -0.17658 2021 7 1 59396 0.2027 0.4418 -0.17639 2021 7 2 59397 0.2042 0.4408 -0.17616 2021 7 3 59398 0.2057 0.4398 -0.17585 2021 7 4 59399 0.2072 0.4387 -0.17540 2021 7 5 59400 0.2087 0.4377 -0.17477 2021 7 6 59401 0.2101 0.4366 -0.17397 2021 7 7 59402 0.2116 0.4355 -0.17303 2021 7 8 59403 0.2130 0.4343 -0.17196 2021 7 9 59404 0.2144 0.4332 -0.17077 2021 7 10 59405 0.2157 0.4320 -0.16952 2021 7 11 59406 0.2171 0.4308 -0.16829 2021 7 12 59407 0.2184 0.4296 -0.16718 2021 7 13 59408 0.2197 0.4283 -0.16623 2021 7 14 59409 0.2210 0.4271 -0.16541 2021 7 15 59410 0.2223 0.4258 -0.16475 2021 7 16 59411 0.2235 0.4245 -0.16425 2021 7 17 59412 0.2248 0.4231 -0.16382 2021 7 18 59413 0.2260 0.4218 -0.16337 2021 7 19 59414 0.2271 0.4204 -0.16278 2021 7 20 59415 0.2283 0.4191 -0.16199 2021 7 21 59416 0.2294 0.4177 -0.16105 2021 7 22 59417 0.2305 0.4162 -0.15994 2021 7 23 59418 0.2316 0.4148 -0.15874 2021 7 24 59419 0.2326 0.4133 -0.15754 2021 7 25 59420 0.2336 0.4119 -0.15648 2021 7 26 59421 0.2346 0.4104 -0.15568 2021 7 27 59422 0.2356 0.4089 -0.15515 2021 7 28 59423 0.2366 0.4074 -0.15483 2021 7 29 59424 0.2375 0.4058 -0.15459 2021 7 30 59425 0.2384 0.4043 -0.15435 2021 7 31 59426 0.2392 0.4027 -0.15407 2021 8 1 59427 0.2401 0.4011 -0.15363 2021 8 2 59428 0.2409 0.3995 -0.15302 2021 8 3 59429 0.2416 0.3979 -0.15223 2021 8 4 59430 0.2424 0.3963 -0.15128 2021 8 5 59431 0.2431 0.3947 -0.15020 2021 8 6 59432 0.2438 0.3930 -0.14903 2021 8 7 59433 0.2444 0.3914 -0.14784 2021 8 8 59434 0.2451 0.3897 -0.14675 2021 8 9 59435 0.2457 0.3881 -0.14578 2021 8 10 59436 0.2462 0.3864 -0.14499 2021 8 11 59437 0.2468 0.3847 -0.14439 2021 8 12 59438 0.2473 0.3830 -0.14398 2021 8 13 59439 0.2478 0.3813 -0.14365 2021 8 14 59440 0.2482 0.3795 -0.14330 2021 8 15 59441 0.2486 0.3778 -0.14286 2021 8 16 59442 0.2490 0.3761 -0.14226 2021 8 17 59443 0.2494 0.3743 -0.14149 2021 8 18 59444 0.2497 0.3726 -0.14052 2021 8 19 59445 0.2500 0.3708 -0.13948 2021 8 20 59446 0.2502 0.3691 -0.13855 2021 8 21 59447 0.2505 0.3673 -0.13776 2021 8 22 59448 0.2506 0.3655 -0.13721 2021 8 23 59449 0.2508 0.3638 -0.13693 2021 8 24 59450 0.2509 0.3620 -0.13684 2021 8 25 59451 0.2510 0.3602 -0.13683 2021 8 26 59452 0.2511 0.3584 -0.13688 2021 8 27 59453 0.2511 0.3566 -0.13689 2021 8 28 59454 0.2511 0.3549 -0.13679 2021 8 29 59455 0.2511 0.3531 -0.13662 2021 8 30 59456 0.2510 0.3513 -0.13633 2021 8 31 59457 0.2509 0.3495 -0.13588 2021 9 1 59458 0.2508 0.3477 -0.13532 2021 9 2 59459 0.2506 0.3459 -0.13478 2021 9 3 59460 0.2505 0.3441 -0.13430 2021 9 4 59461 0.2502 0.3424 -0.13389 2021 9 5 59462 0.2500 0.3406 -0.13363 2021 9 6 59463 0.2497 0.3388 -0.13361 2021 9 7 59464 0.2494 0.3371 -0.13380 2021 9 8 59465 0.2490 0.3353 -0.13424 2021 9 9 59466 0.2486 0.3335 -0.13483 2021 9 10 59467 0.2482 0.3318 -0.13544 2021 9 11 59468 0.2477 0.3300 -0.13594 2021 9 12 59469 0.2472 0.3283 -0.13626 2021 9 13 59470 0.2467 0.3265 -0.13636 2021 9 14 59471 0.2462 0.3248 -0.13630 2021 9 15 59472 0.2456 0.3231 -0.13615 2021 9 16 59473 0.2450 0.3214 -0.13597 2021 9 17 59474 0.2444 0.3197 -0.13578 2021 9 18 59475 0.2437 0.3180 -0.13564 2021 9 19 59476 0.2430 0.3163 -0.13566 2021 9 20 59477 0.2422 0.3146 -0.13584 2021 9 21 59478 0.2415 0.3130 -0.13612 2021 9 22 59479 0.2407 0.3113 -0.13645 2021 9 23 59480 0.2398 0.3097 -0.13675 2021 9 24 59481 0.2390 0.3080 -0.13693 2021 9 25 59482 0.2381 0.3064 -0.13703 2021 9 26 59483 0.2372 0.3048 -0.13704 2021 9 27 59484 0.2362 0.3032 -0.13695 2021 9 28 59485 0.2353 0.3016 -0.13675 2021 9 29 59486 0.2343 0.3001 -0.13647 2021 9 30 59487 0.2332 0.2985 -0.13614 2021 10 1 59488 0.2322 0.2970 -0.13589 2021 10 2 59489 0.2311 0.2955 -0.13584 2021 10 3 59490 0.2300 0.2940 -0.13605 2021 10 4 59491 0.2288 0.2925 -0.13652 2021 10 5 59492 0.2276 0.2910 -0.13729 2021 10 6 59493 0.2264 0.2896 -0.13832 2021 10 7 59494 0.2252 0.2882 -0.13947 2021 10 8 59495 0.2240 0.2868 -0.14064 2021 10 9 59496 0.2227 0.2854 -0.14170 2021 10 10 59497 0.2214 0.2840 -0.14260 2021 10 11 59498 0.2201 0.2826 -0.14329 2021 10 12 59499 0.2187 0.2813 -0.14380 2021 10 13 59500 0.2173 0.2800 -0.14426 2021 10 14 59501 0.2159 0.2787 -0.14476 2021 10 15 59502 0.2145 0.2774 -0.14537 2021 10 16 59503 0.2131 0.2762 -0.14617 2021 10 17 59504 0.2116 0.2750 -0.14718 2021 10 18 59505 0.2101 0.2738 -0.14837 2021 10 19 59506 0.2086 0.2726 -0.14964 2021 10 20 59507 0.2070 0.2714 -0.15087 2021 10 21 59508 0.2055 0.2703 -0.15196 2021 10 22 59509 0.2039 0.2692 -0.15285 2021 10 23 59510 0.2023 0.2681 -0.15342 2021 10 24 59511 0.2007 0.2670 -0.15374 2021 10 25 59512 0.1990 0.2660 -0.15385 2021 10 26 59513 0.1974 0.2650 -0.15380 2021 10 27 59514 0.1957 0.2640 -0.15369 2021 10 28 59515 0.1940 0.2630 -0.15353 2021 10 29 59516 0.1923 0.2621 -0.15342 2021 10 30 59517 0.1905 0.2612 -0.15346 2021 10 31 59518 0.1888 0.2603 -0.15375 2021 11 1 59519 0.1870 0.2594 -0.15434 2021 11 2 59520 0.1852 0.2586 -0.15521 2021 11 3 59521 0.1834 0.2578 -0.15637 2021 11 4 59522 0.1816 0.2570 -0.15766 2021 11 5 59523 0.1798 0.2563 -0.15879 2021 11 6 59524 0.1779 0.2556 -0.15973 2021 11 7 59525 0.1761 0.2549 -0.16044 2021 11 8 59526 0.1742 0.2542 -0.16091 2021 11 9 59527 0.1723 0.2536 -0.16125 2021 11 10 59528 0.1704 0.2530 -0.16157 2021 11 11 59529 0.1685 0.2524 -0.16198 2021 11 12 59530 0.1666 0.2519 -0.16253 2021 11 13 59531 0.1647 0.2514 -0.16324 2021 11 14 59532 0.1628 0.2509 -0.16403 2021 11 15 59533 0.1608 0.2504 -0.16487 2021 11 16 59534 0.1589 0.2500 -0.16569 2021 11 17 59535 0.1569 0.2496 -0.16638 2021 11 18 59536 0.1549 0.2493 -0.16689 2021 11 19 59537 0.1529 0.2489 -0.16716 2021 11 20 59538 0.1510 0.2486 -0.16724 2021 11 21 59539 0.1490 0.2483 -0.16710 2021 11 22 59540 0.1470 0.2481 -0.16675 2021 11 23 59541 0.1450 0.2479 -0.16634 2021 11 24 59542 0.1430 0.2477 -0.16595 2021 11 25 59543 0.1410 0.2476 -0.16565 2021 11 26 59544 0.1389 0.2475 -0.16549 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) 59158 -113.44 0.33 -7.87 0.11 59159 -113.52 0.33 -7.94 0.11 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59158 0.142 0.130 0.091 0.108 59159 0.112 0.130 0.104 0.108 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).