********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 31 December 2020 Vol. XXXIII No. 053 ______________________________________________________________________ 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 12 25 59208 0.07665 .00009 0.29726 .00009 -0.178662 0.000025 20 12 26 59209 0.07598 .00009 0.29795 .00009 -0.178537 0.000020 20 12 27 59210 0.07504 .00009 0.29873 .00009 -0.178245 0.000019 20 12 28 59211 0.07394 .00009 0.29998 .00009 -0.177796 0.000011 20 12 29 59212 0.07263 .00009 0.30151 .00009 -0.177243 0.000011 20 12 30 59213 0.07119 .00009 0.30256 .00009 -0.176643 0.000011 20 12 31 59214 0.06973 .00009 0.30314 .00009 -0.176004 0.000011 _______________________________________________________________________ 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 = 0.1250 - 0.0667 cos A - 0.0833 sin A + 0.0144 cos C + 0.0162 sin C y = 0.3653 - 0.0760 cos A + 0.0597 sin A + 0.0162 cos C - 0.0144 sin C UT1-UTC = -0.1670 + 0.00008 (MJD - 59222) - (UT2-UT1) where A = 2*pi*(MJD-59214)/365.25 and C = 2*pi*(MJD-59214)/435. TAI-UTC(MJD 59215) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59214)**0.80 S t = 0.00025 (MJD-59214)**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 1 1 59215 0.0685 0.3036 -0.17536 2021 1 2 59216 0.0671 0.3040 -0.17481 2021 1 3 59217 0.0659 0.3045 -0.17445 2021 1 4 59218 0.0648 0.3052 -0.17430 2021 1 5 59219 0.0637 0.3060 -0.17437 2021 1 6 59220 0.0627 0.3070 -0.17459 2021 1 7 59221 0.0616 0.3080 -0.17487 2021 1 8 59222 0.0605 0.3090 -0.17509 2021 1 9 59223 0.0593 0.3100 -0.17515 2021 1 10 59224 0.0582 0.3110 -0.17498 2021 1 11 59225 0.0571 0.3121 -0.17458 2021 1 12 59226 0.0560 0.3131 -0.17403 2021 1 13 59227 0.0549 0.3142 -0.17345 2021 1 14 59228 0.0539 0.3153 -0.17292 2021 1 15 59229 0.0528 0.3164 -0.17251 2021 1 16 59230 0.0518 0.3175 -0.17226 2021 1 17 59231 0.0508 0.3185 -0.17217 2021 1 18 59232 0.0499 0.3196 -0.17217 2021 1 19 59233 0.0490 0.3208 -0.17223 2021 1 20 59234 0.0482 0.3220 -0.17227 2021 1 21 59235 0.0474 0.3232 -0.17225 2021 1 22 59236 0.0467 0.3244 -0.17214 2021 1 23 59237 0.0459 0.3257 -0.17192 2021 1 24 59238 0.0451 0.3270 -0.17158 2021 1 25 59239 0.0444 0.3282 -0.17114 2021 1 26 59240 0.0436 0.3295 -0.17063 2021 1 27 59241 0.0429 0.3308 -0.17009 2021 1 28 59242 0.0423 0.3321 -0.16960 2021 1 29 59243 0.0417 0.3334 -0.16925 2021 1 30 59244 0.0411 0.3347 -0.16909 2021 1 31 59245 0.0405 0.3360 -0.16919 2021 2 1 59246 0.0400 0.3374 -0.16951 2021 2 2 59247 0.0394 0.3387 -0.16998 2021 2 3 59248 0.0390 0.3401 -0.17051 2021 2 4 59249 0.0385 0.3415 -0.17099 2021 2 5 59250 0.0380 0.3428 -0.17131 2021 2 6 59251 0.0376 0.3442 -0.17142 2021 2 7 59252 0.0373 0.3456 -0.17133 2021 2 8 59253 0.0369 0.3471 -0.17107 2021 2 9 59254 0.0365 0.3485 -0.17073 2021 2 10 59255 0.0362 0.3499 -0.17042 2021 2 11 59256 0.0359 0.3513 -0.17020 2021 2 12 59257 0.0357 0.3528 -0.17014 2021 2 13 59258 0.0354 0.3542 -0.17023 2021 2 14 59259 0.0352 0.3557 -0.17045 2021 2 15 59260 0.0351 0.3571 -0.17075 2021 2 16 59261 0.0349 0.3586 -0.17109 2021 2 17 59262 0.0348 0.3601 -0.17140 2021 2 18 59263 0.0347 0.3615 -0.17163 2021 2 19 59264 0.0347 0.3630 -0.17173 2021 2 20 59265 0.0346 0.3645 -0.17170 2021 2 21 59266 0.0346 0.3660 -0.17154 2021 2 22 59267 0.0346 0.3674 -0.17127 2021 2 23 59268 0.0347 0.3689 -0.17094 2021 2 24 59269 0.0348 0.3704 -0.17063 2021 2 25 59270 0.0349 0.3719 -0.17042 2021 2 26 59271 0.0350 0.3734 -0.17040 2021 2 27 59272 0.0352 0.3749 -0.17063 2021 2 28 59273 0.0354 0.3764 -0.17111 2021 3 1 59274 0.0356 0.3779 -0.17180 2021 3 2 59275 0.0358 0.3794 -0.17260 2021 3 3 59276 0.0361 0.3808 -0.17337 2021 3 4 59277 0.0364 0.3823 -0.17399 2021 3 5 59278 0.0367 0.3838 -0.17439 2021 3 6 59279 0.0371 0.3853 -0.17454 2021 3 7 59280 0.0375 0.3868 -0.17450 2021 3 8 59281 0.0379 0.3882 -0.17435 2021 3 9 59282 0.0384 0.3897 -0.17420 2021 3 10 59283 0.0388 0.3912 -0.17411 2021 3 11 59284 0.0394 0.3926 -0.17416 2021 3 12 59285 0.0399 0.3941 -0.17436 2021 3 13 59286 0.0404 0.3955 -0.17469 2021 3 14 59287 0.0410 0.3970 -0.17512 2021 3 15 59288 0.0417 0.3984 -0.17558 2021 3 16 59289 0.0423 0.3998 -0.17601 2021 3 17 59290 0.0430 0.4012 -0.17638 2021 3 18 59291 0.0437 0.4027 -0.17663 2021 3 19 59292 0.0444 0.4041 -0.17674 2021 3 20 59293 0.0452 0.4054 -0.17671 2021 3 21 59294 0.0459 0.4068 -0.17657 2021 3 22 59295 0.0467 0.4082 -0.17636 2021 3 23 59296 0.0476 0.4096 -0.17614 2021 3 24 59297 0.0484 0.4109 -0.17600 2021 3 25 59298 0.0493 0.4123 -0.17602 2021 3 26 59299 0.0502 0.4136 -0.17629 2021 3 27 59300 0.0512 0.4149 -0.17686 2021 3 28 59301 0.0521 0.4162 -0.17770 2021 3 29 59302 0.0531 0.4175 -0.17872 2021 3 30 59303 0.0541 0.4188 -0.17977 2021 3 31 59304 0.0552 0.4200 -0.18071 2021 4 1 59305 0.0562 0.4213 -0.18141 2021 4 2 59306 0.0573 0.4225 -0.18184 2021 4 3 59307 0.0584 0.4237 -0.18202 2021 4 4 59308 0.0596 0.4249 -0.18204 2021 4 5 59309 0.0607 0.4261 -0.18201 2021 4 6 59310 0.0619 0.4273 -0.18202 2021 4 7 59311 0.0631 0.4284 -0.18213 2021 4 8 59312 0.0643 0.4296 -0.18238 2021 4 9 59313 0.0656 0.4307 -0.18275 2021 4 10 59314 0.0669 0.4318 -0.18323 2021 4 11 59315 0.0682 0.4329 -0.18375 2021 4 12 59316 0.0695 0.4340 -0.18427 2021 4 13 59317 0.0708 0.4350 -0.18472 2021 4 14 59318 0.0722 0.4360 -0.18505 2021 4 15 59319 0.0735 0.4370 -0.18524 2021 4 16 59320 0.0749 0.4380 -0.18527 2021 4 17 59321 0.0763 0.4390 -0.18516 2021 4 18 59322 0.0778 0.4399 -0.18494 2021 4 19 59323 0.0792 0.4409 -0.18467 2021 4 20 59324 0.0807 0.4418 -0.18442 2021 4 21 59325 0.0822 0.4427 -0.18428 2021 4 22 59326 0.0837 0.4435 -0.18432 2021 4 23 59327 0.0852 0.4444 -0.18461 2021 4 24 59328 0.0868 0.4452 -0.18517 2021 4 25 59329 0.0883 0.4460 -0.18596 2021 4 26 59330 0.0899 0.4468 -0.18686 2021 4 27 59331 0.0915 0.4475 -0.18771 2021 4 28 59332 0.0931 0.4482 -0.18837 2021 4 29 59333 0.0947 0.4489 -0.18874 2021 4 30 59334 0.0963 0.4496 -0.18882 2021 5 1 59335 0.0980 0.4503 -0.18869 2021 5 2 59336 0.0996 0.4509 -0.18844 2021 5 3 59337 0.1013 0.4515 -0.18820 2021 5 4 59338 0.1030 0.4521 -0.18804 2021 5 5 59339 0.1047 0.4527 -0.18800 2021 5 6 59340 0.1064 0.4532 -0.18808 2021 5 7 59341 0.1081 0.4537 -0.18825 2021 5 8 59342 0.1098 0.4542 -0.18847 2021 5 9 59343 0.1115 0.4546 -0.18868 2021 5 10 59344 0.1133 0.4551 -0.18883 2021 5 11 59345 0.1150 0.4555 -0.18887 2021 5 12 59346 0.1168 0.4559 -0.18876 2021 5 13 59347 0.1186 0.4562 -0.18848 2021 5 14 59348 0.1203 0.4565 -0.18804 2021 5 15 59349 0.1221 0.4568 -0.18747 2021 5 16 59350 0.1239 0.4571 -0.18683 2021 5 17 59351 0.1257 0.4573 -0.18617 2021 5 18 59352 0.1275 0.4576 -0.18559 2021 5 19 59353 0.1293 0.4578 -0.18514 2021 5 20 59354 0.1311 0.4579 -0.18489 2021 5 21 59355 0.1329 0.4581 -0.18489 2021 5 22 59356 0.1348 0.4582 -0.18512 2021 5 23 59357 0.1366 0.4582 -0.18550 2021 5 24 59358 0.1384 0.4583 -0.18593 2021 5 25 59359 0.1402 0.4583 -0.18623 2021 5 26 59360 0.1421 0.4583 -0.18630 2021 5 27 59361 0.1439 0.4583 -0.18607 2021 5 28 59362 0.1457 0.4582 -0.18559 2021 5 29 59363 0.1475 0.4581 -0.18495 2021 5 30 59364 0.1494 0.4580 -0.18427 2021 5 31 59365 0.1512 0.4579 -0.18365 2021 6 1 59366 0.1530 0.4577 -0.18315 2021 6 2 59367 0.1548 0.4575 -0.18277 2021 6 3 59368 0.1566 0.4573 -0.18249 2021 6 4 59369 0.1584 0.4570 -0.18225 2021 6 5 59370 0.1603 0.4568 -0.18201 2021 6 6 59371 0.1621 0.4564 -0.18171 2021 6 7 59372 0.1639 0.4561 -0.18131 2021 6 8 59373 0.1657 0.4557 -0.18076 2021 6 9 59374 0.1674 0.4553 -0.18004 2021 6 10 59375 0.1692 0.4549 -0.17916 2021 6 11 59376 0.1710 0.4545 -0.17813 2021 6 12 59377 0.1728 0.4540 -0.17702 2021 6 13 59378 0.1745 0.4535 -0.17587 2021 6 14 59379 0.1763 0.4530 -0.17477 2021 6 15 59380 0.1780 0.4524 -0.17378 2021 6 16 59381 0.1797 0.4518 -0.17297 2021 6 17 59382 0.1815 0.4512 -0.17236 2021 6 18 59383 0.1832 0.4506 -0.17197 2021 6 19 59384 0.1849 0.4499 -0.17174 2021 6 20 59385 0.1865 0.4492 -0.17159 2021 6 21 59386 0.1882 0.4485 -0.17138 2021 6 22 59387 0.1899 0.4478 -0.17100 2021 6 23 59388 0.1915 0.4470 -0.17036 2021 6 24 59389 0.1932 0.4462 -0.16946 2021 6 25 59390 0.1948 0.4454 -0.16835 2021 6 26 59391 0.1964 0.4445 -0.16716 2021 6 27 59392 0.1980 0.4436 -0.16600 2021 6 28 59393 0.1995 0.4428 -0.16493 2021 6 29 59394 0.2011 0.4418 -0.16400 2021 6 30 59395 0.2026 0.4409 -0.16316 2021 7 1 59396 0.2042 0.4399 -0.16237 2021 7 2 59397 0.2057 0.4389 -0.16155 2021 7 3 59398 0.2072 0.4379 -0.16065 2021 7 4 59399 0.2086 0.4369 -0.15962 2021 7 5 59400 0.2101 0.4358 -0.15840 2021 7 6 59401 0.2115 0.4347 -0.15698 2021 7 7 59402 0.2129 0.4336 -0.15537 2021 7 8 59403 0.2143 0.4324 -0.15359 2021 7 9 59404 0.2157 0.4313 -0.15172 2021 7 10 59405 0.2171 0.4301 -0.14984 2021 7 11 59406 0.2184 0.4289 -0.14803 2021 7 12 59407 0.2197 0.4277 -0.14640 2021 7 13 59408 0.2210 0.4264 -0.14500 2021 7 14 59409 0.2222 0.4252 -0.14385 2021 7 15 59410 0.2235 0.4239 -0.14294 2021 7 16 59411 0.2247 0.4226 -0.14222 2021 7 17 59412 0.2259 0.4213 -0.14159 2021 7 18 59413 0.2271 0.4199 -0.14094 2021 7 19 59414 0.2282 0.4186 -0.14019 2021 7 20 59415 0.2293 0.4172 -0.13925 2021 7 21 59416 0.2304 0.4158 -0.13811 2021 7 22 59417 0.2315 0.4144 -0.13681 2021 7 23 59418 0.2325 0.4129 -0.13544 2021 7 24 59419 0.2336 0.4115 -0.13411 2021 7 25 59420 0.2345 0.4100 -0.13293 2021 7 26 59421 0.2355 0.4085 -0.13192 2021 7 27 59422 0.2364 0.4070 -0.13109 2021 7 28 59423 0.2374 0.4055 -0.13037 2021 7 29 59424 0.2382 0.4040 -0.12971 2021 7 30 59425 0.2391 0.4024 -0.12905 2021 7 31 59426 0.2399 0.4009 -0.12832 2021 8 1 59427 0.2407 0.3993 -0.12750 2021 8 2 59428 0.2415 0.3977 -0.12655 2021 8 3 59429 0.2422 0.3961 -0.12545 2021 8 4 59430 0.2429 0.3945 -0.12421 2021 8 5 59431 0.2436 0.3929 -0.12283 2021 8 6 59432 0.2443 0.3912 -0.12139 2021 8 7 59433 0.2449 0.3896 -0.12002 2021 8 8 59434 0.2455 0.3879 -0.11886 2021 8 9 59435 0.2460 0.3862 -0.11797 2021 8 10 59436 0.2466 0.3846 -0.11739 2021 8 11 59437 0.2471 0.3829 -0.11710 2021 8 12 59438 0.2475 0.3812 -0.11701 2021 8 13 59439 0.2480 0.3795 -0.11705 2021 8 14 59440 0.2484 0.3778 -0.11706 2021 8 15 59441 0.2488 0.3760 -0.11698 2021 8 16 59442 0.2491 0.3743 -0.11676 2021 8 17 59443 0.2494 0.3726 -0.11635 2021 8 18 59444 0.2497 0.3708 -0.11575 2021 8 19 59445 0.2499 0.3691 -0.11504 2021 8 20 59446 0.2502 0.3673 -0.11434 2021 8 21 59447 0.2504 0.3656 -0.11378 2021 8 22 59448 0.2505 0.3638 -0.11343 2021 8 23 59449 0.2506 0.3620 -0.11334 2021 8 24 59450 0.2507 0.3603 -0.11338 2021 8 25 59451 0.2508 0.3585 -0.11350 2021 8 26 59452 0.2508 0.3567 -0.11367 2021 8 27 59453 0.2508 0.3549 -0.11381 2021 8 28 59454 0.2507 0.3532 -0.11387 2021 8 29 59455 0.2507 0.3514 -0.11381 2021 8 30 59456 0.2506 0.3496 -0.11360 2021 8 31 59457 0.2504 0.3478 -0.11328 2021 9 1 59458 0.2502 0.3461 -0.11279 2021 9 2 59459 0.2500 0.3443 -0.11221 2021 9 3 59460 0.2498 0.3425 -0.11164 2021 9 4 59461 0.2495 0.3407 -0.11115 2021 9 5 59462 0.2492 0.3390 -0.11090 2021 9 6 59463 0.2489 0.3372 -0.11093 2021 9 7 59464 0.2485 0.3354 -0.11118 2021 9 8 59465 0.2481 0.3337 -0.11169 2021 9 9 59466 0.2477 0.3319 -0.11236 2021 9 10 59467 0.2472 0.3302 -0.11297 2021 9 11 59468 0.2467 0.3285 -0.11347 2021 9 12 59469 0.2462 0.3267 -0.11377 2021 9 13 59470 0.2457 0.3250 -0.11376 2021 9 14 59471 0.2451 0.3233 -0.11354 2021 9 15 59472 0.2444 0.3216 -0.11323 2021 9 16 59473 0.2438 0.3199 -0.11290 2021 9 17 59474 0.2431 0.3182 -0.11262 2021 9 18 59475 0.2424 0.3165 -0.11247 2021 9 19 59476 0.2416 0.3148 -0.11251 2021 9 20 59477 0.2409 0.3131 -0.11274 2021 9 21 59478 0.2401 0.3115 -0.11307 2021 9 22 59479 0.2392 0.3098 -0.11339 2021 9 23 59480 0.2384 0.3082 -0.11363 2021 9 24 59481 0.2375 0.3066 -0.11377 2021 9 25 59482 0.2365 0.3050 -0.11376 2021 9 26 59483 0.2356 0.3034 -0.11359 2021 9 27 59484 0.2346 0.3018 -0.11324 2021 9 28 59485 0.2336 0.3002 -0.11278 2021 9 29 59486 0.2325 0.2987 -0.11232 2021 9 30 59487 0.2315 0.2971 -0.11188 2021 10 1 59488 0.2304 0.2956 -0.11150 2021 10 2 59489 0.2292 0.2941 -0.11124 2021 10 3 59490 0.2281 0.2926 -0.11122 2021 10 4 59491 0.2269 0.2911 -0.11155 2021 10 5 59492 0.2257 0.2897 -0.11226 2021 10 6 59493 0.2245 0.2883 -0.11327 2021 10 7 59494 0.2232 0.2868 -0.11442 2021 10 8 59495 0.2219 0.2854 -0.11554 2021 10 9 59496 0.2206 0.2840 -0.11651 2021 10 10 59497 0.2193 0.2827 -0.11720 2021 10 11 59498 0.2179 0.2813 -0.11761 2021 10 12 59499 0.2165 0.2800 -0.11781 2021 10 13 59500 0.2151 0.2787 -0.11791 2021 10 14 59501 0.2137 0.2774 -0.11800 2021 10 15 59502 0.2122 0.2762 -0.11819 2021 10 16 59503 0.2107 0.2749 -0.11848 2021 10 17 59504 0.2092 0.2737 -0.11894 2021 10 18 59505 0.2077 0.2725 -0.11947 2021 10 19 59506 0.2061 0.2713 -0.12002 2021 10 20 59507 0.2046 0.2702 -0.12051 2021 10 21 59508 0.2030 0.2691 -0.12093 2021 10 22 59509 0.2014 0.2680 -0.12118 2021 10 23 59510 0.1997 0.2669 -0.12125 2021 10 24 59511 0.1981 0.2658 -0.12116 2021 10 25 59512 0.1964 0.2648 -0.12094 2021 10 26 59513 0.1947 0.2638 -0.12066 2021 10 27 59514 0.1930 0.2628 -0.12031 2021 10 28 59515 0.1913 0.2619 -0.12003 2021 10 29 59516 0.1895 0.2609 -0.11995 2021 10 30 59517 0.1878 0.2600 -0.12008 2021 10 31 59518 0.1860 0.2592 -0.12049 2021 11 1 59519 0.1842 0.2583 -0.12124 2021 11 2 59520 0.1824 0.2575 -0.12225 2021 11 3 59521 0.1806 0.2567 -0.12341 2021 11 4 59522 0.1787 0.2559 -0.12463 2021 11 5 59523 0.1769 0.2552 -0.12575 2021 11 6 59524 0.1750 0.2545 -0.12661 2021 11 7 59525 0.1732 0.2538 -0.12726 2021 11 8 59526 0.1713 0.2531 -0.12771 2021 11 9 59527 0.1694 0.2525 -0.12799 2021 11 10 59528 0.1675 0.2519 -0.12826 2021 11 11 59529 0.1655 0.2514 -0.12868 2021 11 12 59530 0.1636 0.2508 -0.12930 2021 11 13 59531 0.1617 0.2503 -0.13006 2021 11 14 59532 0.1597 0.2498 -0.13092 2021 11 15 59533 0.1577 0.2494 -0.13183 2021 11 16 59534 0.1558 0.2490 -0.13271 2021 11 17 59535 0.1538 0.2486 -0.13351 2021 11 18 59536 0.1518 0.2482 -0.13418 2021 11 19 59537 0.1498 0.2479 -0.13467 2021 11 20 59538 0.1478 0.2476 -0.13497 2021 11 21 59539 0.1458 0.2473 -0.13511 2021 11 22 59540 0.1438 0.2471 -0.13512 2021 11 23 59541 0.1418 0.2469 -0.13510 2021 11 24 59542 0.1398 0.2467 -0.13512 2021 11 25 59543 0.1378 0.2466 -0.13519 2021 11 26 59544 0.1358 0.2464 -0.13530 2021 11 27 59545 0.1337 0.2464 -0.13548 2021 11 28 59546 0.1317 0.2463 -0.13585 2021 11 29 59547 0.1297 0.2463 -0.13643 2021 11 30 59548 0.1277 0.2463 -0.13716 2021 12 1 59549 0.1256 0.2464 -0.13798 2021 12 2 59550 0.1236 0.2464 -0.13875 2021 12 3 59551 0.1216 0.2465 -0.13931 2021 12 4 59552 0.1196 0.2467 -0.13966 2021 12 5 59553 0.1176 0.2468 -0.13981 2021 12 6 59554 0.1155 0.2470 -0.13983 2021 12 7 59555 0.1135 0.2473 -0.13981 2021 12 8 59556 0.1115 0.2475 -0.13983 2021 12 9 59557 0.1095 0.2478 -0.13997 2021 12 10 59558 0.1075 0.2481 -0.14029 2021 12 11 59559 0.1055 0.2485 -0.14080 2021 12 12 59560 0.1036 0.2489 -0.14142 2021 12 13 59561 0.1016 0.2493 -0.14205 2021 12 14 59562 0.0996 0.2498 -0.14264 2021 12 15 59563 0.0977 0.2502 -0.14316 2021 12 16 59564 0.0957 0.2507 -0.14353 2021 12 17 59565 0.0938 0.2513 -0.14380 2021 12 18 59566 0.0918 0.2519 -0.14396 2021 12 19 59567 0.0899 0.2525 -0.14407 2021 12 20 59568 0.0880 0.2531 -0.14414 2021 12 21 59569 0.0861 0.2537 -0.14419 2021 12 22 59570 0.0842 0.2544 -0.14429 2021 12 23 59571 0.0823 0.2552 -0.14451 2021 12 24 59572 0.0805 0.2559 -0.14487 2021 12 25 59573 0.0786 0.2567 -0.14546 2021 12 26 59574 0.0768 0.2575 -0.14629 2021 12 27 59575 0.0750 0.2583 -0.14735 2021 12 28 59576 0.0732 0.2592 -0.14852 2021 12 29 59577 0.0714 0.2601 -0.14968 2021 12 30 59578 0.0696 0.2610 -0.15067 2021 12 31 59579 0.0679 0.2620 -0.15137 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).