********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 14 December 2017 Vol. XXX No. 050 ______________________________________________________________________ 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 30 Nov 2017 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should be available by 20:00 UTC. * * * * We are currently not able to receive email at * * ser7@maia.usno.navy.mil. Questions and enquiries can now be * * directed to the following email account: navobsy_eop.fct@navy.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 17 12 8 58095 0.10701 .00009 0.23356 .00009 0.239384 0.000015 17 12 9 58096 0.10482 .00009 0.23391 .00009 0.238041 0.000014 17 12 10 58097 0.10261 .00009 0.23458 .00009 0.236602 0.000013 17 12 11 58098 0.10020 .00009 0.23541 .00009 0.235138 0.000010 17 12 12 58099 0.09779 .00009 0.23609 .00009 0.233712 0.000010 17 12 13 58100 0.09539 .00009 0.23657 .00009 0.232367 0.000008 17 12 14 58101 0.09287 .00009 0.23703 .00009 0.231160 0.000055 _______________________________________________________________________ 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 = 0.1088 + 0.0177 cos A - 0.1326 sin A - 0.0339 cos C + 0.0005 sin C y = 0.3522 - 0.1208 cos A - 0.0215 sin A + 0.0005 cos C + 0.0339 sin C UT1-UTC = 0.2291 - 0.00103 (MJD - 58109) - (UT2-UT1) where A = 2*pi*(MJD-58101)/365.25 and C = 2*pi*(MJD-58101)/435. TAI-UTC(MJD 58102) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58101)**0.80 S t = 0.00025 (MJD-58101)**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) 2017 12 15 58102 0.0904 0.2374 0.23010 2017 12 16 58103 0.0880 0.2378 0.22920 2017 12 17 58104 0.0857 0.2383 0.22846 2017 12 18 58105 0.0834 0.2388 0.22786 2017 12 19 58106 0.0813 0.2394 0.22734 2017 12 20 58107 0.0791 0.2400 0.22686 2017 12 21 58108 0.0770 0.2406 0.22636 2017 12 22 58109 0.0748 0.2411 0.22581 2017 12 23 58110 0.0727 0.2417 0.22516 2017 12 24 58111 0.0707 0.2424 0.22439 2017 12 25 58112 0.0686 0.2430 0.22347 2017 12 26 58113 0.0665 0.2438 0.22240 2017 12 27 58114 0.0644 0.2445 0.22117 2017 12 28 58115 0.0624 0.2453 0.21983 2017 12 29 58116 0.0604 0.2462 0.21846 2017 12 30 58117 0.0584 0.2471 0.21714 2017 12 31 58118 0.0564 0.2481 0.21591 2018 1 1 58119 0.0545 0.2490 0.21481 2018 1 2 58120 0.0525 0.2500 0.21379 2018 1 3 58121 0.0506 0.2510 0.21281 2018 1 4 58122 0.0486 0.2521 0.21180 2018 1 5 58123 0.0467 0.2531 0.21072 2018 1 6 58124 0.0448 0.2542 0.20956 2018 1 7 58125 0.0430 0.2554 0.20837 2018 1 8 58126 0.0412 0.2565 0.20718 2018 1 9 58127 0.0394 0.2577 0.20604 2018 1 10 58128 0.0376 0.2589 0.20499 2018 1 11 58129 0.0358 0.2601 0.20404 2018 1 12 58130 0.0341 0.2614 0.20323 2018 1 13 58131 0.0324 0.2627 0.20254 2018 1 14 58132 0.0307 0.2640 0.20196 2018 1 15 58133 0.0290 0.2653 0.20146 2018 1 16 58134 0.0273 0.2667 0.20101 2018 1 17 58135 0.0257 0.2681 0.20055 2018 1 18 58136 0.0241 0.2695 0.20005 2018 1 19 58137 0.0225 0.2710 0.19946 2018 1 20 58138 0.0210 0.2725 0.19874 2018 1 21 58139 0.0195 0.2739 0.19789 2018 1 22 58140 0.0180 0.2755 0.19691 2018 1 23 58141 0.0165 0.2770 0.19581 2018 1 24 58142 0.0151 0.2786 0.19465 2018 1 25 58143 0.0136 0.2802 0.19348 2018 1 26 58144 0.0123 0.2818 0.19235 2018 1 27 58145 0.0109 0.2834 0.19130 2018 1 28 58146 0.0096 0.2851 0.19036 2018 1 29 58147 0.0083 0.2867 0.18950 2018 1 30 58148 0.0070 0.2884 0.18867 2018 1 31 58149 0.0058 0.2901 0.18780 2018 2 1 58150 0.0046 0.2919 0.18682 2018 2 2 58151 0.0034 0.2936 0.18572 2018 2 3 58152 0.0022 0.2954 0.18450 2018 2 4 58153 0.0011 0.2972 0.18323 2018 2 5 58154 0.0000 0.2990 0.18199 2018 2 6 58155 -0.0010 0.3008 0.18082 2018 2 7 58156 -0.0020 0.3027 0.17976 2018 2 8 58157 -0.0030 0.3045 0.17883 2018 2 9 58158 -0.0040 0.3064 0.17802 2018 2 10 58159 -0.0049 0.3083 0.17732 2018 2 11 58160 -0.0058 0.3102 0.17670 2018 2 12 58161 -0.0067 0.3121 0.17612 2018 2 13 58162 -0.0075 0.3141 0.17553 2018 2 14 58163 -0.0083 0.3160 0.17489 2018 2 15 58164 -0.0090 0.3180 0.17416 2018 2 16 58165 -0.0097 0.3199 0.17330 2018 2 17 58166 -0.0104 0.3219 0.17230 2018 2 18 58167 -0.0111 0.3239 0.17116 2018 2 19 58168 -0.0117 0.3259 0.16991 2018 2 20 58169 -0.0123 0.3279 0.16858 2018 2 21 58170 -0.0128 0.3300 0.16724 2018 2 22 58171 -0.0133 0.3320 0.16593 2018 2 23 58172 -0.0138 0.3340 0.16469 2018 2 24 58173 -0.0142 0.3361 0.16354 2018 2 25 58174 -0.0146 0.3382 0.16246 2018 2 26 58175 -0.0150 0.3402 0.16141 2018 2 27 58176 -0.0153 0.3423 0.16031 2018 2 28 58177 -0.0156 0.3444 0.15911 2018 3 1 58178 -0.0159 0.3465 0.15774 2018 3 2 58179 -0.0161 0.3485 0.15622 2018 3 3 58180 -0.0163 0.3506 0.15459 2018 3 4 58181 -0.0164 0.3527 0.15292 2018 3 5 58182 -0.0165 0.3548 0.15129 2018 3 6 58183 -0.0166 0.3569 0.14975 2018 3 7 58184 -0.0166 0.3590 0.14833 2018 3 8 58185 -0.0166 0.3612 0.14705 2018 3 9 58186 -0.0166 0.3633 0.14589 2018 3 10 58187 -0.0165 0.3654 0.14482 2018 3 11 58188 -0.0164 0.3675 0.14381 2018 3 12 58189 -0.0162 0.3696 0.14282 2018 3 13 58190 -0.0160 0.3717 0.14178 2018 3 14 58191 -0.0158 0.3738 0.14066 2018 3 15 58192 -0.0155 0.3759 0.13941 2018 3 16 58193 -0.0152 0.3780 0.13802 2018 3 17 58194 -0.0149 0.3801 0.13647 2018 3 18 58195 -0.0145 0.3822 0.13478 2018 3 19 58196 -0.0141 0.3843 0.13301 2018 3 20 58197 -0.0137 0.3864 0.13121 2018 3 21 58198 -0.0132 0.3884 0.12944 2018 3 22 58199 -0.0127 0.3905 0.12776 2018 3 23 58200 -0.0121 0.3926 0.12619 2018 3 24 58201 -0.0115 0.3946 0.12473 2018 3 25 58202 -0.0109 0.3967 0.12332 2018 3 26 58203 -0.0102 0.3987 0.12192 2018 3 27 58204 -0.0095 0.4007 0.12045 2018 3 28 58205 -0.0088 0.4028 0.11886 2018 3 29 58206 -0.0080 0.4048 0.11712 2018 3 30 58207 -0.0072 0.4068 0.11525 2018 3 31 58208 -0.0064 0.4088 0.11331 2018 4 1 58209 -0.0055 0.4107 0.11138 2018 4 2 58210 -0.0046 0.4127 0.10959 2018 4 3 58211 -0.0036 0.4146 0.10793 2018 4 4 58212 -0.0026 0.4166 0.10642 2018 4 5 58213 -0.0016 0.4185 0.10506 2018 4 6 58214 -0.0006 0.4204 0.10382 2018 4 7 58215 0.0005 0.4223 0.10267 2018 4 8 58216 0.0016 0.4242 0.10158 2018 4 9 58217 0.0028 0.4261 0.10047 2018 4 10 58218 0.0040 0.4279 0.09932 2018 4 11 58219 0.0052 0.4297 0.09808 2018 4 12 58220 0.0064 0.4315 0.09671 2018 4 13 58221 0.0077 0.4333 0.09520 2018 4 14 58222 0.0090 0.4351 0.09355 2018 4 15 58223 0.0103 0.4369 0.09180 2018 4 16 58224 0.0117 0.4386 0.09000 2018 4 17 58225 0.0131 0.4403 0.08823 2018 4 18 58226 0.0145 0.4420 0.08654 2018 4 19 58227 0.0160 0.4437 0.08499 2018 4 20 58228 0.0175 0.4454 0.08358 2018 4 21 58229 0.0190 0.4470 0.08226 2018 4 22 58230 0.0205 0.4486 0.08099 2018 4 23 58231 0.0221 0.4502 0.07970 2018 4 24 58232 0.0237 0.4518 0.07831 2018 4 25 58233 0.0253 0.4533 0.07682 2018 4 26 58234 0.0270 0.4548 0.07522 2018 4 27 58235 0.0287 0.4563 0.07355 2018 4 28 58236 0.0304 0.4578 0.07186 2018 4 29 58237 0.0321 0.4592 0.07023 2018 4 30 58238 0.0338 0.4607 0.06872 2018 5 1 58239 0.0356 0.4621 0.06735 2018 5 2 58240 0.0374 0.4634 0.06614 2018 5 3 58241 0.0393 0.4648 0.06508 2018 5 4 58242 0.0411 0.4661 0.06414 2018 5 5 58243 0.0430 0.4674 0.06328 2018 5 6 58244 0.0449 0.4686 0.06246 2018 5 7 58245 0.0468 0.4699 0.06161 2018 5 8 58246 0.0487 0.4711 0.06069 2018 5 9 58247 0.0507 0.4723 0.05968 2018 5 10 58248 0.0527 0.4734 0.05855 2018 5 11 58249 0.0546 0.4745 0.05729 2018 5 12 58250 0.0567 0.4756 0.05592 2018 5 13 58251 0.0587 0.4767 0.05447 2018 5 14 58252 0.0607 0.4777 0.05301 2018 5 15 58253 0.0628 0.4787 0.05160 2018 5 16 58254 0.0649 0.4797 0.05033 2018 5 17 58255 0.0670 0.4806 0.04920 2018 5 18 58256 0.0691 0.4815 0.04820 2018 5 19 58257 0.0713 0.4824 0.04728 2018 5 20 58258 0.0734 0.4833 0.04636 2018 5 21 58259 0.0756 0.4841 0.04539 2018 5 22 58260 0.0777 0.4849 0.04432 2018 5 23 58261 0.0799 0.4856 0.04316 2018 5 24 58262 0.0821 0.4863 0.04195 2018 5 25 58263 0.0843 0.4870 0.04072 2018 5 26 58264 0.0865 0.4877 0.03955 2018 5 27 58265 0.0888 0.4883 0.03848 2018 5 28 58266 0.0910 0.4889 0.03755 2018 5 29 58267 0.0933 0.4894 0.03678 2018 5 30 58268 0.0955 0.4899 0.03617 2018 5 31 58269 0.0978 0.4904 0.03570 2018 6 1 58270 0.1001 0.4909 0.03532 2018 6 2 58271 0.1024 0.4913 0.03500 2018 6 3 58272 0.1046 0.4917 0.03469 2018 6 4 58273 0.1069 0.4920 0.03434 2018 6 5 58274 0.1092 0.4923 0.03391 2018 6 6 58275 0.1115 0.4926 0.03338 2018 6 7 58276 0.1138 0.4929 0.03274 2018 6 8 58277 0.1162 0.4931 0.03199 2018 6 9 58278 0.1185 0.4933 0.03116 2018 6 10 58279 0.1208 0.4934 0.03029 2018 6 11 58280 0.1231 0.4935 0.02944 2018 6 12 58281 0.1254 0.4936 0.02869 2018 6 13 58282 0.1277 0.4936 0.02808 2018 6 14 58283 0.1300 0.4936 0.02761 2018 6 15 58284 0.1324 0.4936 0.02726 2018 6 16 58285 0.1347 0.4935 0.02693 2018 6 17 58286 0.1370 0.4934 0.02658 2018 6 18 58287 0.1393 0.4933 0.02613 2018 6 19 58288 0.1416 0.4932 0.02559 2018 6 20 58289 0.1439 0.4930 0.02498 2018 6 21 58290 0.1462 0.4927 0.02435 2018 6 22 58291 0.1485 0.4925 0.02374 2018 6 23 58292 0.1508 0.4921 0.02320 2018 6 24 58293 0.1530 0.4918 0.02276 2018 6 25 58294 0.1553 0.4914 0.02244 2018 6 26 58295 0.1576 0.4910 0.02223 2018 6 27 58296 0.1598 0.4906 0.02214 2018 6 28 58297 0.1621 0.4901 0.02215 2018 6 29 58298 0.1643 0.4896 0.02221 2018 6 30 58299 0.1665 0.4891 0.02229 2018 7 1 58300 0.1687 0.4885 0.02233 2018 7 2 58301 0.1709 0.4879 0.02231 2018 7 3 58302 0.1731 0.4873 0.02217 2018 7 4 58303 0.1753 0.4866 0.02191 2018 7 5 58304 0.1775 0.4859 0.02152 2018 7 6 58305 0.1796 0.4852 0.02100 2018 7 7 58306 0.1817 0.4844 0.02037 2018 7 8 58307 0.1839 0.4836 0.01969 2018 7 9 58308 0.1860 0.4828 0.01900 2018 7 10 58309 0.1881 0.4819 0.01835 2018 7 11 58310 0.1901 0.4810 0.01777 2018 7 12 58311 0.1922 0.4801 0.01726 2018 7 13 58312 0.1942 0.4791 0.01675 2018 7 14 58313 0.1962 0.4781 0.01618 2018 7 15 58314 0.1982 0.4771 0.01551 2018 7 16 58315 0.2002 0.4761 0.01472 2018 7 17 58316 0.2022 0.4750 0.01386 2018 7 18 58317 0.2041 0.4739 0.01300 2018 7 19 58318 0.2061 0.4728 0.01219 2018 7 20 58319 0.2080 0.4716 0.01147 2018 7 21 58320 0.2098 0.4704 0.01085 2018 7 22 58321 0.2117 0.4692 0.01038 2018 7 23 58322 0.2135 0.4680 0.01008 2018 7 24 58323 0.2153 0.4667 0.00995 2018 7 25 58324 0.2171 0.4654 0.00995 2018 7 26 58325 0.2189 0.4641 0.01003 2018 7 27 58326 0.2206 0.4627 0.01009 2018 7 28 58327 0.2223 0.4613 0.01007 2018 7 29 58328 0.2240 0.4599 0.00991 2018 7 30 58329 0.2257 0.4585 0.00962 2018 7 31 58330 0.2273 0.4570 0.00928 2018 8 1 58331 0.2289 0.4556 0.00882 2018 8 2 58332 0.2305 0.4540 0.00822 2018 8 3 58333 0.2320 0.4525 0.00757 2018 8 4 58334 0.2336 0.4510 0.00692 2018 8 5 58335 0.2351 0.4494 0.00630 2018 8 6 58336 0.2365 0.4478 0.00579 2018 8 7 58337 0.2380 0.4462 0.00540 2018 8 8 58338 0.2394 0.4446 0.00499 2018 8 9 58339 0.2407 0.4429 0.00459 2018 8 10 58340 0.2421 0.4412 0.00421 2018 8 11 58341 0.2434 0.4395 0.00379 2018 8 12 58342 0.2447 0.4378 0.00322 2018 8 13 58343 0.2459 0.4361 0.00246 2018 8 14 58344 0.2472 0.4343 0.00157 2018 8 15 58345 0.2484 0.4325 0.00067 2018 8 16 58346 0.2495 0.4307 -0.00016 2018 8 17 58347 0.2506 0.4289 -0.00091 2018 8 18 58348 0.2517 0.4271 -0.00155 2018 8 19 58349 0.2528 0.4253 -0.00214 2018 8 20 58350 0.2538 0.4234 -0.00259 2018 8 21 58351 0.2548 0.4215 -0.00296 2018 8 22 58352 0.2558 0.4196 -0.00327 2018 8 23 58353 0.2567 0.4177 -0.00356 2018 8 24 58354 0.2576 0.4158 -0.00387 2018 8 25 58355 0.2584 0.4139 -0.00423 2018 8 26 58356 0.2593 0.4119 -0.00479 2018 8 27 58357 0.2601 0.4100 -0.00553 2018 8 28 58358 0.2608 0.4080 -0.00641 2018 8 29 58359 0.2615 0.4061 -0.00735 2018 8 30 58360 0.2622 0.4041 -0.00831 2018 8 31 58361 0.2628 0.4021 -0.00928 2018 9 1 58362 0.2635 0.4001 -0.01020 2018 9 2 58363 0.2640 0.3981 -0.01099 2018 9 3 58364 0.2646 0.3960 -0.01160 2018 9 4 58365 0.2651 0.3940 -0.01208 2018 9 5 58366 0.2655 0.3920 -0.01257 2018 9 6 58367 0.2660 0.3899 -0.01309 2018 9 7 58368 0.2663 0.3879 -0.01370 2018 9 8 58369 0.2667 0.3858 -0.01446 2018 9 9 58370 0.2670 0.3838 -0.01534 2018 9 10 58371 0.2673 0.3817 -0.01640 2018 9 11 58372 0.2675 0.3796 -0.01755 2018 9 12 58373 0.2678 0.3775 -0.01874 2018 9 13 58374 0.2679 0.3755 -0.01987 2018 9 14 58375 0.2681 0.3734 -0.02083 2018 9 15 58376 0.2682 0.3713 -0.02164 2018 9 16 58377 0.2682 0.3692 -0.02231 2018 9 17 58378 0.2682 0.3672 -0.02284 2018 9 18 58379 0.2682 0.3651 -0.02328 2018 9 19 58380 0.2682 0.3630 -0.02373 2018 9 20 58381 0.2681 0.3609 -0.02423 2018 9 21 58382 0.2680 0.3588 -0.02479 2018 9 22 58383 0.2678 0.3568 -0.02554 2018 9 23 58384 0.2676 0.3547 -0.02638 2018 9 24 58385 0.2674 0.3526 -0.02733 2018 9 25 58386 0.2671 0.3506 -0.02840 2018 9 26 58387 0.2668 0.3485 -0.02952 2018 9 27 58388 0.2665 0.3464 -0.03069 2018 9 28 58389 0.2661 0.3444 -0.03185 2018 9 29 58390 0.2657 0.3424 -0.03296 2018 9 30 58391 0.2652 0.3403 -0.03403 2018 10 1 58392 0.2647 0.3383 -0.03506 2018 10 2 58393 0.2642 0.3363 -0.03604 2018 10 3 58394 0.2637 0.3343 -0.03694 2018 10 4 58395 0.2631 0.3322 -0.03787 2018 10 5 58396 0.2624 0.3303 -0.03893 2018 10 6 58397 0.2618 0.3283 -0.04018 2018 10 7 58398 0.2611 0.3263 -0.04163 2018 10 8 58399 0.2604 0.3243 -0.04319 2018 10 9 58400 0.2596 0.3224 -0.04475 2018 10 10 58401 0.2588 0.3204 -0.04628 2018 10 11 58402 0.2580 0.3185 -0.04765 2018 10 12 58403 0.2571 0.3166 -0.04881 2018 10 13 58404 0.2562 0.3147 -0.04977 2018 10 14 58405 0.2553 0.3128 -0.05061 2018 10 15 58406 0.2543 0.3109 -0.05134 2018 10 16 58407 0.2533 0.3091 -0.05199 2018 10 17 58408 0.2523 0.3072 -0.05263 2018 10 18 58409 0.2513 0.3054 -0.05336 2018 10 19 58410 0.2502 0.3036 -0.05423 2018 10 20 58411 0.2490 0.3018 -0.05529 2018 10 21 58412 0.2479 0.3000 -0.05647 2018 10 22 58413 0.2467 0.2983 -0.05779 2018 10 23 58414 0.2455 0.2965 -0.05926 2018 10 24 58415 0.2443 0.2948 -0.06083 2018 10 25 58416 0.2430 0.2931 -0.06246 2018 10 26 58417 0.2417 0.2914 -0.06416 2018 10 27 58418 0.2404 0.2898 -0.06580 2018 10 28 58419 0.2390 0.2881 -0.06735 2018 10 29 58420 0.2376 0.2865 -0.06878 2018 10 30 58421 0.2362 0.2849 -0.07016 2018 10 31 58422 0.2348 0.2834 -0.07153 2018 11 1 58423 0.2333 0.2818 -0.07297 2018 11 2 58424 0.2319 0.2803 -0.07450 2018 11 3 58425 0.2303 0.2788 -0.07617 2018 11 4 58426 0.2288 0.2773 -0.07793 2018 11 5 58427 0.2272 0.2758 -0.07976 2018 11 6 58428 0.2257 0.2744 -0.08156 2018 11 7 58429 0.2240 0.2730 -0.08324 2018 11 8 58430 0.2224 0.2716 -0.08473 2018 11 9 58431 0.2208 0.2702 -0.08603 2018 11 10 58432 0.2191 0.2689 -0.08715 2018 11 11 58433 0.2174 0.2676 -0.08811 2018 11 12 58434 0.2157 0.2663 -0.08899 2018 11 13 58435 0.2139 0.2650 -0.08983 2018 11 14 58436 0.2122 0.2638 -0.09071 2018 11 15 58437 0.2104 0.2626 -0.09166 2018 11 16 58438 0.2086 0.2614 -0.09273 2018 11 17 58439 0.2068 0.2603 -0.09391 2018 11 18 58440 0.2049 0.2592 -0.09526 2018 11 19 58441 0.2031 0.2581 -0.09673 2018 11 20 58442 0.2012 0.2570 -0.09830 2018 11 21 58443 0.1993 0.2560 -0.09992 2018 11 22 58444 0.1974 0.2550 -0.10151 2018 11 23 58445 0.1955 0.2540 -0.10297 2018 11 24 58446 0.1935 0.2531 -0.10428 2018 11 25 58447 0.1916 0.2521 -0.10547 2018 11 26 58448 0.1896 0.2513 -0.10660 2018 11 27 58449 0.1877 0.2504 -0.10779 2018 11 28 58450 0.1857 0.2496 -0.10908 2018 11 29 58451 0.1837 0.2488 -0.11049 2018 11 30 58452 0.1816 0.2480 -0.11202 2018 12 1 58453 0.1796 0.2473 -0.11369 2018 12 2 58454 0.1776 0.2466 -0.11541 2018 12 3 58455 0.1755 0.2459 -0.11712 2018 12 4 58456 0.1735 0.2453 -0.11879 2018 12 5 58457 0.1714 0.2447 -0.12034 2018 12 6 58458 0.1693 0.2441 -0.12171 2018 12 7 58459 0.1673 0.2436 -0.12289 2018 12 8 58460 0.1652 0.2431 -0.12394 2018 12 9 58461 0.1631 0.2426 -0.12490 2018 12 10 58462 0.1610 0.2421 -0.12575 2018 12 11 58463 0.1589 0.2417 -0.12658 2018 12 12 58464 0.1568 0.2413 -0.12746 2018 12 13 58465 0.1547 0.2410 -0.12839 2018 12 14 58466 0.1526 0.2407 -0.12941 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) 58075 -105.68 0.30 -9.53 0.01 58076 -105.51 0.30 -9.55 0.02 58077 -105.25 0.30 -9.67 0.03 58078 -104.89 0.30 -9.74 0.04 58079 -104.56 0.30 -9.71 0.04 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58075 0.295 0.119 -0.047 0.010 58076 0.299 0.119 -0.024 0.020 58077 0.297 0.119 -0.027 0.030 58078 0.297 0.119 -0.021 0.040 58079 0.295 0.119 -0.005 0.040 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).