********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 24 December 2020 Vol. XXXIII No. 052 ______________________________________________________________________ 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 18 59201 0.08208 .00009 0.29457 .00009 -0.178743 0.000013 20 12 19 59202 0.08117 .00009 0.29493 .00009 -0.178460 0.000015 20 12 20 59203 0.08004 .00009 0.29524 .00009 -0.178314 0.000015 20 12 21 59204 0.07888 .00009 0.29550 .00009 -0.178305 0.000014 20 12 22 59205 0.07789 .00009 0.29579 .00009 -0.178407 0.000016 20 12 23 59206 0.07727 .00009 0.29609 .00009 -0.178552 0.000019 20 12 24 59207 0.07697 .00009 0.29654 .00009 -0.178643 0.000022 _______________________________________________________________________ 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 = 0.1238 - 0.0566 cos A - 0.0897 sin A + 0.0134 cos C + 0.0170 sin C y = 0.3633 - 0.0820 cos A + 0.0505 sin A + 0.0170 cos C - 0.0134 sin C UT1-UTC = -0.1676 + 0.00007 (MJD - 59215) - (UT2-UT1) where A = 2*pi*(MJD-59207)/365.25 and C = 2*pi*(MJD-59207)/435. TAI-UTC(MJD 59208) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59207)**0.80 S t = 0.00025 (MJD-59207)**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 12 25 59208 0.0765 0.2972 -0.17862 2020 12 26 59209 0.0760 0.2981 -0.17845 2020 12 27 59210 0.0752 0.2990 -0.17812 2020 12 28 59211 0.0743 0.2999 -0.17763 2020 12 29 59212 0.0732 0.3008 -0.17700 2020 12 30 59213 0.0721 0.3017 -0.17626 2020 12 31 59214 0.0710 0.3024 -0.17546 2021 1 1 59215 0.0700 0.3032 -0.17470 2021 1 2 59216 0.0689 0.3039 -0.17408 2021 1 3 59217 0.0679 0.3047 -0.17370 2021 1 4 59218 0.0668 0.3056 -0.17358 2021 1 5 59219 0.0658 0.3064 -0.17369 2021 1 6 59220 0.0647 0.3074 -0.17400 2021 1 7 59221 0.0636 0.3083 -0.17438 2021 1 8 59222 0.0626 0.3093 -0.17470 2021 1 9 59223 0.0615 0.3103 -0.17484 2021 1 10 59224 0.0605 0.3113 -0.17476 2021 1 11 59225 0.0595 0.3123 -0.17445 2021 1 12 59226 0.0584 0.3134 -0.17399 2021 1 13 59227 0.0574 0.3145 -0.17348 2021 1 14 59228 0.0563 0.3156 -0.17303 2021 1 15 59229 0.0553 0.3166 -0.17270 2021 1 16 59230 0.0543 0.3177 -0.17252 2021 1 17 59231 0.0533 0.3188 -0.17248 2021 1 18 59232 0.0524 0.3199 -0.17253 2021 1 19 59233 0.0515 0.3210 -0.17263 2021 1 20 59234 0.0506 0.3222 -0.17273 2021 1 21 59235 0.0498 0.3234 -0.17277 2021 1 22 59236 0.0489 0.3246 -0.17271 2021 1 23 59237 0.0481 0.3258 -0.17253 2021 1 24 59238 0.0474 0.3271 -0.17221 2021 1 25 59239 0.0466 0.3283 -0.17177 2021 1 26 59240 0.0459 0.3295 -0.17124 2021 1 27 59241 0.0452 0.3308 -0.17069 2021 1 28 59242 0.0445 0.3321 -0.17018 2021 1 29 59243 0.0438 0.3334 -0.16981 2021 1 30 59244 0.0432 0.3347 -0.16965 2021 1 31 59245 0.0426 0.3360 -0.16973 2021 2 1 59246 0.0421 0.3373 -0.17005 2021 2 2 59247 0.0415 0.3386 -0.17052 2021 2 3 59248 0.0410 0.3400 -0.17106 2021 2 4 59249 0.0405 0.3413 -0.17155 2021 2 5 59250 0.0401 0.3427 -0.17190 2021 2 6 59251 0.0397 0.3440 -0.17205 2021 2 7 59252 0.0393 0.3454 -0.17198 2021 2 8 59253 0.0389 0.3468 -0.17175 2021 2 9 59254 0.0385 0.3482 -0.17144 2021 2 10 59255 0.0382 0.3496 -0.17113 2021 2 11 59256 0.0379 0.3510 -0.17091 2021 2 12 59257 0.0376 0.3525 -0.17083 2021 2 13 59258 0.0374 0.3539 -0.17089 2021 2 14 59259 0.0372 0.3553 -0.17108 2021 2 15 59260 0.0370 0.3568 -0.17133 2021 2 16 59261 0.0368 0.3582 -0.17159 2021 2 17 59262 0.0367 0.3597 -0.17181 2021 2 18 59263 0.0366 0.3611 -0.17193 2021 2 19 59264 0.0365 0.3626 -0.17194 2021 2 20 59265 0.0365 0.3640 -0.17182 2021 2 21 59266 0.0364 0.3655 -0.17158 2021 2 22 59267 0.0365 0.3670 -0.17124 2021 2 23 59268 0.0365 0.3684 -0.17086 2021 2 24 59269 0.0366 0.3699 -0.17050 2021 2 25 59270 0.0366 0.3714 -0.17026 2021 2 26 59271 0.0368 0.3729 -0.17021 2021 2 27 59272 0.0369 0.3743 -0.17042 2021 2 28 59273 0.0371 0.3758 -0.17089 2021 3 1 59274 0.0373 0.3773 -0.17158 2021 3 2 59275 0.0375 0.3788 -0.17236 2021 3 3 59276 0.0378 0.3802 -0.17310 2021 3 4 59277 0.0381 0.3817 -0.17368 2021 3 5 59278 0.0384 0.3832 -0.17403 2021 3 6 59279 0.0387 0.3847 -0.17414 2021 3 7 59280 0.0391 0.3861 -0.17406 2021 3 8 59281 0.0395 0.3876 -0.17387 2021 3 9 59282 0.0399 0.3890 -0.17367 2021 3 10 59283 0.0404 0.3905 -0.17355 2021 3 11 59284 0.0409 0.3919 -0.17357 2021 3 12 59285 0.0414 0.3934 -0.17375 2021 3 13 59286 0.0419 0.3948 -0.17408 2021 3 14 59287 0.0425 0.3962 -0.17452 2021 3 15 59288 0.0431 0.3977 -0.17501 2021 3 16 59289 0.0437 0.3991 -0.17550 2021 3 17 59290 0.0444 0.4005 -0.17592 2021 3 18 59291 0.0451 0.4019 -0.17623 2021 3 19 59292 0.0458 0.4033 -0.17642 2021 3 20 59293 0.0465 0.4047 -0.17647 2021 3 21 59294 0.0473 0.4060 -0.17640 2021 3 22 59295 0.0481 0.4074 -0.17626 2021 3 23 59296 0.0489 0.4088 -0.17611 2021 3 24 59297 0.0497 0.4101 -0.17603 2021 3 25 59298 0.0506 0.4114 -0.17610 2021 3 26 59299 0.0515 0.4127 -0.17641 2021 3 27 59300 0.0524 0.4141 -0.17700 2021 3 28 59301 0.0533 0.4153 -0.17785 2021 3 29 59302 0.0543 0.4166 -0.17886 2021 3 30 59303 0.0553 0.4179 -0.17991 2021 3 31 59304 0.0563 0.4192 -0.18084 2021 4 1 59305 0.0573 0.4204 -0.18153 2021 4 2 59306 0.0584 0.4216 -0.18195 2021 4 3 59307 0.0595 0.4228 -0.18212 2021 4 4 59308 0.0606 0.4240 -0.18214 2021 4 5 59309 0.0617 0.4252 -0.18210 2021 4 6 59310 0.0629 0.4264 -0.18211 2021 4 7 59311 0.0641 0.4275 -0.18222 2021 4 8 59312 0.0653 0.4287 -0.18248 2021 4 9 59313 0.0665 0.4298 -0.18287 2021 4 10 59314 0.0678 0.4309 -0.18336 2021 4 11 59315 0.0690 0.4320 -0.18390 2021 4 12 59316 0.0703 0.4330 -0.18443 2021 4 13 59317 0.0716 0.4341 -0.18489 2021 4 14 59318 0.0730 0.4351 -0.18523 2021 4 15 59319 0.0743 0.4361 -0.18542 2021 4 16 59320 0.0757 0.4371 -0.18546 2021 4 17 59321 0.0771 0.4380 -0.18535 2021 4 18 59322 0.0785 0.4390 -0.18515 2021 4 19 59323 0.0799 0.4399 -0.18489 2021 4 20 59324 0.0814 0.4408 -0.18466 2021 4 21 59325 0.0828 0.4417 -0.18454 2021 4 22 59326 0.0843 0.4426 -0.18460 2021 4 23 59327 0.0858 0.4434 -0.18491 2021 4 24 59328 0.0873 0.4442 -0.18549 2021 4 25 59329 0.0888 0.4450 -0.18630 2021 4 26 59330 0.0904 0.4458 -0.18721 2021 4 27 59331 0.0920 0.4465 -0.18809 2021 4 28 59332 0.0935 0.4473 -0.18877 2021 4 29 59333 0.0951 0.4480 -0.18917 2021 4 30 59334 0.0967 0.4486 -0.18928 2021 5 1 59335 0.0984 0.4493 -0.18918 2021 5 2 59336 0.1000 0.4499 -0.18897 2021 5 3 59337 0.1016 0.4505 -0.18876 2021 5 4 59338 0.1033 0.4511 -0.18863 2021 5 5 59339 0.1050 0.4517 -0.18862 2021 5 6 59340 0.1066 0.4522 -0.18874 2021 5 7 59341 0.1083 0.4527 -0.18894 2021 5 8 59342 0.1100 0.4532 -0.18920 2021 5 9 59343 0.1117 0.4537 -0.18945 2021 5 10 59344 0.1135 0.4541 -0.18963 2021 5 11 59345 0.1152 0.4545 -0.18971 2021 5 12 59346 0.1169 0.4549 -0.18963 2021 5 13 59347 0.1187 0.4552 -0.18938 2021 5 14 59348 0.1204 0.4556 -0.18897 2021 5 15 59349 0.1222 0.4559 -0.18844 2021 5 16 59350 0.1240 0.4561 -0.18783 2021 5 17 59351 0.1257 0.4564 -0.18721 2021 5 18 59352 0.1275 0.4566 -0.18665 2021 5 19 59353 0.1293 0.4568 -0.18624 2021 5 20 59354 0.1311 0.4570 -0.18602 2021 5 21 59355 0.1329 0.4571 -0.18605 2021 5 22 59356 0.1347 0.4572 -0.18631 2021 5 23 59357 0.1365 0.4573 -0.18673 2021 5 24 59358 0.1383 0.4573 -0.18718 2021 5 25 59359 0.1401 0.4574 -0.18752 2021 5 26 59360 0.1419 0.4574 -0.18762 2021 5 27 59361 0.1437 0.4574 -0.18742 2021 5 28 59362 0.1455 0.4573 -0.18697 2021 5 29 59363 0.1473 0.4572 -0.18635 2021 5 30 59364 0.1491 0.4571 -0.18570 2021 5 31 59365 0.1509 0.4570 -0.18510 2021 6 1 59366 0.1527 0.4568 -0.18462 2021 6 2 59367 0.1545 0.4566 -0.18426 2021 6 3 59368 0.1563 0.4564 -0.18400 2021 6 4 59369 0.1581 0.4561 -0.18378 2021 6 5 59370 0.1599 0.4559 -0.18355 2021 6 6 59371 0.1617 0.4556 -0.18326 2021 6 7 59372 0.1635 0.4552 -0.18287 2021 6 8 59373 0.1653 0.4549 -0.18232 2021 6 9 59374 0.1670 0.4545 -0.18161 2021 6 10 59375 0.1688 0.4541 -0.18072 2021 6 11 59376 0.1705 0.4536 -0.17970 2021 6 12 59377 0.1723 0.4531 -0.17857 2021 6 13 59378 0.1740 0.4526 -0.17742 2021 6 14 59379 0.1758 0.4521 -0.17630 2021 6 15 59380 0.1775 0.4516 -0.17531 2021 6 16 59381 0.1792 0.4510 -0.17448 2021 6 17 59382 0.1809 0.4504 -0.17385 2021 6 18 59383 0.1826 0.4498 -0.17343 2021 6 19 59384 0.1843 0.4491 -0.17317 2021 6 20 59385 0.1860 0.4484 -0.17297 2021 6 21 59386 0.1876 0.4477 -0.17271 2021 6 22 59387 0.1893 0.4470 -0.17226 2021 6 23 59388 0.1909 0.4462 -0.17153 2021 6 24 59389 0.1925 0.4454 -0.17051 2021 6 25 59390 0.1941 0.4446 -0.16927 2021 6 26 59391 0.1957 0.4438 -0.16791 2021 6 27 59392 0.1973 0.4429 -0.16656 2021 6 28 59393 0.1988 0.4420 -0.16528 2021 6 29 59394 0.2004 0.4411 -0.16411 2021 6 30 59395 0.2019 0.4401 -0.16302 2021 7 1 59396 0.2034 0.4392 -0.16198 2021 7 2 59397 0.2049 0.4382 -0.16094 2021 7 3 59398 0.2064 0.4372 -0.15987 2021 7 4 59399 0.2079 0.4361 -0.15873 2021 7 5 59400 0.2093 0.4351 -0.15749 2021 7 6 59401 0.2107 0.4340 -0.15613 2021 7 7 59402 0.2121 0.4329 -0.15464 2021 7 8 59403 0.2135 0.4318 -0.15303 2021 7 9 59404 0.2149 0.4306 -0.15134 2021 7 10 59405 0.2162 0.4294 -0.14963 2021 7 11 59406 0.2175 0.4283 -0.14799 2021 7 12 59407 0.2188 0.4270 -0.14650 2021 7 13 59408 0.2201 0.4258 -0.14522 2021 7 14 59409 0.2214 0.4246 -0.14420 2021 7 15 59410 0.2226 0.4233 -0.14342 2021 7 16 59411 0.2238 0.4220 -0.14283 2021 7 17 59412 0.2250 0.4207 -0.14236 2021 7 18 59413 0.2262 0.4193 -0.14188 2021 7 19 59414 0.2273 0.4180 -0.14130 2021 7 20 59415 0.2284 0.4166 -0.14053 2021 7 21 59416 0.2295 0.4152 -0.13954 2021 7 22 59417 0.2306 0.4138 -0.13837 2021 7 23 59418 0.2316 0.4124 -0.13711 2021 7 24 59419 0.2326 0.4109 -0.13589 2021 7 25 59420 0.2336 0.4095 -0.13481 2021 7 26 59421 0.2346 0.4080 -0.13397 2021 7 27 59422 0.2355 0.4065 -0.13336 2021 7 28 59423 0.2364 0.4050 -0.13293 2021 7 29 59424 0.2373 0.4035 -0.13259 2021 7 30 59425 0.2381 0.4019 -0.13224 2021 7 31 59426 0.2389 0.4004 -0.13180 2021 8 1 59427 0.2397 0.3988 -0.13126 2021 8 2 59428 0.2405 0.3972 -0.13059 2021 8 3 59429 0.2412 0.3956 -0.12980 2021 8 4 59430 0.2419 0.3940 -0.12888 2021 8 5 59431 0.2426 0.3924 -0.12786 2021 8 6 59432 0.2433 0.3908 -0.12681 2021 8 7 59433 0.2439 0.3892 -0.12583 2021 8 8 59434 0.2445 0.3875 -0.12499 2021 8 9 59435 0.2450 0.3858 -0.12440 2021 8 10 59436 0.2456 0.3842 -0.12402 2021 8 11 59437 0.2461 0.3825 -0.12385 2021 8 12 59438 0.2465 0.3808 -0.12390 2021 8 13 59439 0.2470 0.3791 -0.12409 2021 8 14 59440 0.2474 0.3774 -0.12431 2021 8 15 59441 0.2477 0.3757 -0.12445 2021 8 16 59442 0.2481 0.3740 -0.12439 2021 8 17 59443 0.2484 0.3722 -0.12415 2021 8 18 59444 0.2487 0.3705 -0.12366 2021 8 19 59445 0.2489 0.3688 -0.12301 2021 8 20 59446 0.2491 0.3670 -0.12236 2021 8 21 59447 0.2493 0.3653 -0.12181 2021 8 22 59448 0.2495 0.3635 -0.12150 2021 8 23 59449 0.2496 0.3618 -0.12141 2021 8 24 59450 0.2497 0.3600 -0.12145 2021 8 25 59451 0.2498 0.3582 -0.12160 2021 8 26 59452 0.2498 0.3565 -0.12178 2021 8 27 59453 0.2498 0.3547 -0.12180 2021 8 28 59454 0.2497 0.3530 -0.12171 2021 8 29 59455 0.2497 0.3512 -0.12146 2021 8 30 59456 0.2496 0.3494 -0.12098 2021 8 31 59457 0.2494 0.3476 -0.12036 2021 9 1 59458 0.2492 0.3459 -0.11969 2021 9 2 59459 0.2490 0.3441 -0.11896 2021 9 3 59460 0.2488 0.3424 -0.11823 2021 9 4 59461 0.2485 0.3406 -0.11758 2021 9 5 59462 0.2482 0.3388 -0.11708 2021 9 6 59463 0.2479 0.3371 -0.11683 2021 9 7 59464 0.2476 0.3353 -0.11682 2021 9 8 59465 0.2472 0.3336 -0.11698 2021 9 9 59466 0.2467 0.3318 -0.11725 2021 9 10 59467 0.2463 0.3301 -0.11754 2021 9 11 59468 0.2458 0.3284 -0.11772 2021 9 12 59469 0.2453 0.3266 -0.11771 2021 9 13 59470 0.2447 0.3249 -0.11745 2021 9 14 59471 0.2441 0.3232 -0.11698 2021 9 15 59472 0.2435 0.3215 -0.11647 2021 9 16 59473 0.2429 0.3198 -0.11595 2021 9 17 59474 0.2422 0.3181 -0.11552 2021 9 18 59475 0.2415 0.3165 -0.11522 2021 9 19 59476 0.2407 0.3148 -0.11514 2021 9 20 59477 0.2400 0.3131 -0.11534 2021 9 21 59478 0.2392 0.3115 -0.11577 2021 9 22 59479 0.2383 0.3099 -0.11635 2021 9 23 59480 0.2375 0.3082 -0.11694 2021 9 24 59481 0.2366 0.3066 -0.11747 2021 9 25 59482 0.2357 0.3050 -0.11789 2021 9 26 59483 0.2347 0.3034 -0.11812 2021 9 27 59484 0.2337 0.3019 -0.11817 2021 9 28 59485 0.2327 0.3003 -0.11807 2021 9 29 59486 0.2317 0.2988 -0.11787 2021 9 30 59487 0.2306 0.2972 -0.11762 2021 10 1 59488 0.2295 0.2957 -0.11739 2021 10 2 59489 0.2284 0.2942 -0.11725 2021 10 3 59490 0.2273 0.2927 -0.11729 2021 10 4 59491 0.2261 0.2913 -0.11755 2021 10 5 59492 0.2249 0.2898 -0.11802 2021 10 6 59493 0.2237 0.2884 -0.11865 2021 10 7 59494 0.2224 0.2870 -0.11939 2021 10 8 59495 0.2211 0.2856 -0.12004 2021 10 9 59496 0.2198 0.2842 -0.12049 2021 10 10 59497 0.2185 0.2829 -0.12070 2021 10 11 59498 0.2171 0.2815 -0.12068 2021 10 12 59499 0.2158 0.2802 -0.12053 2021 10 13 59500 0.2143 0.2789 -0.12028 2021 10 14 59501 0.2129 0.2777 -0.12011 2021 10 15 59502 0.2115 0.2764 -0.12017 2021 10 16 59503 0.2100 0.2752 -0.12045 2021 10 17 59504 0.2085 0.2740 -0.12096 2021 10 18 59505 0.2070 0.2728 -0.12168 2021 10 19 59506 0.2054 0.2716 -0.12250 2021 10 20 59507 0.2039 0.2705 -0.12330 2021 10 21 59508 0.2023 0.2694 -0.12406 2021 10 22 59509 0.2007 0.2683 -0.12471 2021 10 23 59510 0.1991 0.2672 -0.12517 2021 10 24 59511 0.1974 0.2661 -0.12554 2021 10 25 59512 0.1958 0.2651 -0.12580 2021 10 26 59513 0.1941 0.2641 -0.12591 2021 10 27 59514 0.1924 0.2632 -0.12598 2021 10 28 59515 0.1907 0.2622 -0.12613 2021 10 29 59516 0.1889 0.2613 -0.12643 2021 10 30 59517 0.1872 0.2604 -0.12686 2021 10 31 59518 0.1854 0.2595 -0.12750 2021 11 1 59519 0.1836 0.2587 -0.12839 2021 11 2 59520 0.1818 0.2579 -0.12948 2021 11 3 59521 0.1800 0.2571 -0.13073 2021 11 4 59522 0.1782 0.2563 -0.13200 2021 11 5 59523 0.1764 0.2556 -0.13312 2021 11 6 59524 0.1745 0.2549 -0.13400 2021 11 7 59525 0.1726 0.2542 -0.13459 2021 11 8 59526 0.1708 0.2536 -0.13496 2021 11 9 59527 0.1689 0.2530 -0.13524 2021 11 10 59528 0.1670 0.2524 -0.13555 2021 11 11 59529 0.1650 0.2518 -0.13595 2021 11 12 59530 0.1631 0.2513 -0.13641 2021 11 13 59531 0.1612 0.2508 -0.13692 2021 11 14 59532 0.1592 0.2503 -0.13752 2021 11 15 59533 0.1573 0.2499 -0.13817 2021 11 16 59534 0.1553 0.2495 -0.13877 2021 11 17 59535 0.1534 0.2491 -0.13931 2021 11 18 59536 0.1514 0.2487 -0.13972 2021 11 19 59537 0.1494 0.2484 -0.13993 2021 11 20 59538 0.1474 0.2481 -0.14002 2021 11 21 59539 0.1454 0.2479 -0.14001 2021 11 22 59540 0.1434 0.2476 -0.13992 2021 11 23 59541 0.1414 0.2474 -0.13976 2021 11 24 59542 0.1394 0.2473 -0.13958 2021 11 25 59543 0.1374 0.2471 -0.13943 2021 11 26 59544 0.1354 0.2470 -0.13942 2021 11 27 59545 0.1334 0.2470 -0.13966 2021 11 28 59546 0.1314 0.2469 -0.14016 2021 11 29 59547 0.1294 0.2469 -0.14089 2021 11 30 59548 0.1274 0.2469 -0.14184 2021 12 1 59549 0.1253 0.2470 -0.14294 2021 12 2 59550 0.1233 0.2471 -0.14400 2021 12 3 59551 0.1213 0.2472 -0.14495 2021 12 4 59552 0.1193 0.2473 -0.14570 2021 12 5 59553 0.1173 0.2475 -0.14628 2021 12 6 59554 0.1153 0.2477 -0.14673 2021 12 7 59555 0.1133 0.2479 -0.14712 2021 12 8 59556 0.1113 0.2482 -0.14759 2021 12 9 59557 0.1093 0.2485 -0.14820 2021 12 10 59558 0.1073 0.2488 -0.14897 2021 12 11 59559 0.1053 0.2492 -0.14990 2021 12 12 59560 0.1034 0.2496 -0.15091 2021 12 13 59561 0.1014 0.2500 -0.15198 2021 12 14 59562 0.0994 0.2505 -0.15299 2021 12 15 59563 0.0975 0.2510 -0.15384 2021 12 16 59564 0.0955 0.2515 -0.15448 2021 12 17 59565 0.0936 0.2520 -0.15487 2021 12 18 59566 0.0917 0.2526 -0.15493 2021 12 19 59567 0.0898 0.2532 -0.15476 2021 12 20 59568 0.0879 0.2538 -0.15445 2021 12 21 59569 0.0860 0.2545 -0.15406 2021 12 22 59570 0.0841 0.2552 -0.15368 2021 12 23 59571 0.0822 0.2559 -0.15336 2021 12 24 59572 0.0804 0.2567 -0.15315 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) 59192 -109.84 0.50 -6.23 0.21 59193 -110.08 0.50 -6.04 0.21 59194 -110.56 0.50 -5.90 0.21 59195 -111.11 0.32 -5.91 0.16 59196 -111.45 0.13 -6.06 0.05 59197 -111.46 0.13 -6.13 0.05 59198 -111.27 0.13 -6.02 0.05 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59192 0.147 0.201 -0.076 0.214 59193 0.129 0.201 -0.072 0.214 59194 0.106 0.201 -0.063 0.214 59195 0.080 0.128 -0.051 0.160 59196 0.052 0.051 -0.036 0.051 59197 0.021 0.051 -0.019 0.051 59198 -0.010 0.051 -0.002 0.051 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).