********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 December 2017 Vol. XXX No. 051 ______________________________________________________________________ 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 15 58102 0.09033 .00009 0.23757 .00009 0.230134 0.000029 17 12 16 58103 0.08764 .00009 0.23809 .00009 0.229272 0.000026 17 12 17 58104 0.08482 .00009 0.23858 .00009 0.228533 0.000033 17 12 18 58105 0.08187 .00009 0.23905 .00009 0.227912 0.000026 17 12 19 58106 0.07888 .00009 0.23943 .00009 0.227377 0.000026 17 12 20 58107 0.07611 .00009 0.23937 .00009 0.226864 0.000025 17 12 21 58108 0.07376 .00009 0.23883 .00009 0.226306 0.000024 _______________________________________________________________________ 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 = 0.1059 + 0.0018 cos A - 0.1351 sin A - 0.0348 cos C + 0.0048 sin C y = 0.3532 - 0.1236 cos A - 0.0074 sin A + 0.0048 cos C + 0.0348 sin C UT1-UTC = 0.2238 - 0.00102 (MJD - 58116) - (UT2-UT1) where A = 2*pi*(MJD-58108)/365.25 and C = 2*pi*(MJD-58108)/435. TAI-UTC(MJD 58109) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58108)**0.80 S t = 0.00025 (MJD-58108)**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 22 58109 0.0718 0.2385 0.22572 2017 12 23 58110 0.0698 0.2383 0.22508 2017 12 24 58111 0.0680 0.2384 0.22434 2017 12 25 58112 0.0660 0.2388 0.22348 2017 12 26 58113 0.0640 0.2395 0.22249 2017 12 27 58114 0.0619 0.2402 0.22140 2017 12 28 58115 0.0599 0.2409 0.22026 2017 12 29 58116 0.0578 0.2417 0.21912 2017 12 30 58117 0.0558 0.2425 0.21803 2017 12 31 58118 0.0538 0.2435 0.21704 2018 1 1 58119 0.0519 0.2444 0.21616 2018 1 2 58120 0.0499 0.2454 0.21533 2018 1 3 58121 0.0479 0.2465 0.21449 2018 1 4 58122 0.0459 0.2475 0.21358 2018 1 5 58123 0.0439 0.2486 0.21257 2018 1 6 58124 0.0419 0.2497 0.21144 2018 1 7 58125 0.0400 0.2509 0.21022 2018 1 8 58126 0.0381 0.2521 0.20896 2018 1 9 58127 0.0362 0.2532 0.20774 2018 1 10 58128 0.0343 0.2544 0.20659 2018 1 11 58129 0.0325 0.2555 0.20555 2018 1 12 58130 0.0306 0.2568 0.20465 2018 1 13 58131 0.0289 0.2580 0.20387 2018 1 14 58132 0.0271 0.2593 0.20321 2018 1 15 58133 0.0254 0.2607 0.20264 2018 1 16 58134 0.0237 0.2621 0.20213 2018 1 17 58135 0.0220 0.2635 0.20162 2018 1 18 58136 0.0204 0.2649 0.20107 2018 1 19 58137 0.0188 0.2664 0.20043 2018 1 20 58138 0.0172 0.2679 0.19966 2018 1 21 58139 0.0156 0.2694 0.19876 2018 1 22 58140 0.0140 0.2710 0.19772 2018 1 23 58141 0.0125 0.2726 0.19659 2018 1 24 58142 0.0110 0.2742 0.19539 2018 1 25 58143 0.0095 0.2758 0.19419 2018 1 26 58144 0.0081 0.2774 0.19302 2018 1 27 58145 0.0067 0.2791 0.19193 2018 1 28 58146 0.0053 0.2808 0.19095 2018 1 29 58147 0.0039 0.2825 0.19004 2018 1 30 58148 0.0026 0.2842 0.18915 2018 1 31 58149 0.0013 0.2860 0.18820 2018 2 1 58150 0.0000 0.2878 0.18713 2018 2 2 58151 -0.0012 0.2896 0.18593 2018 2 3 58152 -0.0024 0.2914 0.18462 2018 2 4 58153 -0.0036 0.2932 0.18327 2018 2 5 58154 -0.0047 0.2951 0.18194 2018 2 6 58155 -0.0058 0.2969 0.18070 2018 2 7 58156 -0.0069 0.2988 0.17959 2018 2 8 58157 -0.0079 0.3007 0.17863 2018 2 9 58158 -0.0089 0.3027 0.17780 2018 2 10 58159 -0.0099 0.3046 0.17709 2018 2 11 58160 -0.0108 0.3066 0.17648 2018 2 12 58161 -0.0117 0.3085 0.17591 2018 2 13 58162 -0.0126 0.3105 0.17533 2018 2 14 58163 -0.0134 0.3125 0.17471 2018 2 15 58164 -0.0142 0.3145 0.17399 2018 2 16 58165 -0.0149 0.3166 0.17315 2018 2 17 58166 -0.0157 0.3186 0.17216 2018 2 18 58167 -0.0163 0.3207 0.17103 2018 2 19 58168 -0.0170 0.3227 0.16979 2018 2 20 58169 -0.0176 0.3248 0.16847 2018 2 21 58170 -0.0182 0.3269 0.16713 2018 2 22 58171 -0.0187 0.3290 0.16582 2018 2 23 58172 -0.0192 0.3311 0.16459 2018 2 24 58173 -0.0197 0.3332 0.16344 2018 2 25 58174 -0.0201 0.3353 0.16237 2018 2 26 58175 -0.0205 0.3374 0.16133 2018 2 27 58176 -0.0209 0.3396 0.16026 2018 2 28 58177 -0.0212 0.3417 0.15908 2018 3 1 58178 -0.0215 0.3439 0.15776 2018 3 2 58179 -0.0217 0.3460 0.15629 2018 3 3 58180 -0.0219 0.3482 0.15473 2018 3 4 58181 -0.0221 0.3503 0.15313 2018 3 5 58182 -0.0222 0.3525 0.15159 2018 3 6 58183 -0.0223 0.3547 0.15014 2018 3 7 58184 -0.0223 0.3568 0.14882 2018 3 8 58185 -0.0224 0.3590 0.14764 2018 3 9 58186 -0.0223 0.3612 0.14658 2018 3 10 58187 -0.0223 0.3633 0.14562 2018 3 11 58188 -0.0222 0.3655 0.14471 2018 3 12 58189 -0.0220 0.3677 0.14380 2018 3 13 58190 -0.0218 0.3699 0.14285 2018 3 14 58191 -0.0216 0.3720 0.14181 2018 3 15 58192 -0.0214 0.3742 0.14065 2018 3 16 58193 -0.0211 0.3764 0.13934 2018 3 17 58194 -0.0208 0.3785 0.13787 2018 3 18 58195 -0.0204 0.3807 0.13626 2018 3 19 58196 -0.0200 0.3828 0.13456 2018 3 20 58197 -0.0195 0.3850 0.13283 2018 3 21 58198 -0.0191 0.3871 0.13113 2018 3 22 58199 -0.0185 0.3893 0.12952 2018 3 23 58200 -0.0180 0.3914 0.12802 2018 3 24 58201 -0.0174 0.3935 0.12661 2018 3 25 58202 -0.0167 0.3957 0.12525 2018 3 26 58203 -0.0161 0.3978 0.12389 2018 3 27 58204 -0.0154 0.3999 0.12245 2018 3 28 58205 -0.0146 0.4019 0.12089 2018 3 29 58206 -0.0139 0.4040 0.11919 2018 3 30 58207 -0.0130 0.4061 0.11736 2018 3 31 58208 -0.0122 0.4081 0.11546 2018 4 1 58209 -0.0113 0.4102 0.11357 2018 4 2 58210 -0.0104 0.4122 0.11175 2018 4 3 58211 -0.0094 0.4142 0.11006 2018 4 4 58212 -0.0084 0.4163 0.10852 2018 4 5 58213 -0.0074 0.4183 0.10713 2018 4 6 58214 -0.0063 0.4202 0.10587 2018 4 7 58215 -0.0052 0.4222 0.10470 2018 4 8 58216 -0.0041 0.4241 0.10357 2018 4 9 58217 -0.0029 0.4261 0.10251 2018 4 10 58218 -0.0017 0.4280 0.10140 2018 4 11 58219 -0.0005 0.4299 0.10019 2018 4 12 58220 0.0008 0.4318 0.09886 2018 4 13 58221 0.0021 0.4336 0.09738 2018 4 14 58222 0.0034 0.4355 0.09577 2018 4 15 58223 0.0048 0.4373 0.09405 2018 4 16 58224 0.0062 0.4391 0.09228 2018 4 17 58225 0.0076 0.4409 0.09053 2018 4 18 58226 0.0090 0.4427 0.08887 2018 4 19 58227 0.0105 0.4444 0.08734 2018 4 20 58228 0.0120 0.4461 0.08594 2018 4 21 58229 0.0136 0.4478 0.08465 2018 4 22 58230 0.0152 0.4495 0.08340 2018 4 23 58231 0.0168 0.4512 0.08212 2018 4 24 58232 0.0184 0.4528 0.08076 2018 4 25 58233 0.0201 0.4544 0.07928 2018 4 26 58234 0.0218 0.4560 0.07770 2018 4 27 58235 0.0235 0.4576 0.07605 2018 4 28 58236 0.0252 0.4591 0.07438 2018 4 29 58237 0.0270 0.4606 0.07278 2018 4 30 58238 0.0288 0.4621 0.07129 2018 5 1 58239 0.0306 0.4635 0.06995 2018 5 2 58240 0.0325 0.4650 0.06877 2018 5 3 58241 0.0343 0.4664 0.06774 2018 5 4 58242 0.0362 0.4677 0.06682 2018 5 5 58243 0.0381 0.4691 0.06599 2018 5 6 58244 0.0401 0.4704 0.06519 2018 5 7 58245 0.0420 0.4717 0.06437 2018 5 8 58246 0.0440 0.4730 0.06348 2018 5 9 58247 0.0460 0.4742 0.06249 2018 5 10 58248 0.0481 0.4754 0.06138 2018 5 11 58249 0.0501 0.4766 0.06015 2018 5 12 58250 0.0522 0.4777 0.05880 2018 5 13 58251 0.0543 0.4788 0.05737 2018 5 14 58252 0.0564 0.4799 0.05593 2018 5 15 58253 0.0585 0.4810 0.05455 2018 5 16 58254 0.0606 0.4820 0.05329 2018 5 17 58255 0.0628 0.4830 0.05219 2018 5 18 58256 0.0650 0.4839 0.05121 2018 5 19 58257 0.0671 0.4849 0.05032 2018 5 20 58258 0.0693 0.4858 0.04943 2018 5 21 58259 0.0716 0.4866 0.04848 2018 5 22 58260 0.0738 0.4874 0.04744 2018 5 23 58261 0.0760 0.4882 0.04632 2018 5 24 58262 0.0783 0.4890 0.04513 2018 5 25 58263 0.0806 0.4897 0.04393 2018 5 26 58264 0.0829 0.4904 0.04279 2018 5 27 58265 0.0852 0.4911 0.04174 2018 5 28 58266 0.0875 0.4917 0.04084 2018 5 29 58267 0.0898 0.4923 0.04010 2018 5 30 58268 0.0921 0.4929 0.03951 2018 5 31 58269 0.0944 0.4934 0.03905 2018 6 1 58270 0.0968 0.4939 0.03868 2018 6 2 58271 0.0991 0.4943 0.03837 2018 6 3 58272 0.1015 0.4947 0.03806 2018 6 4 58273 0.1038 0.4951 0.03771 2018 6 5 58274 0.1062 0.4955 0.03727 2018 6 6 58275 0.1086 0.4958 0.03673 2018 6 7 58276 0.1109 0.4961 0.03607 2018 6 8 58277 0.1133 0.4963 0.03530 2018 6 9 58278 0.1157 0.4965 0.03445 2018 6 10 58279 0.1181 0.4967 0.03356 2018 6 11 58280 0.1205 0.4968 0.03268 2018 6 12 58281 0.1229 0.4969 0.03190 2018 6 13 58282 0.1252 0.4970 0.03125 2018 6 14 58283 0.1276 0.4970 0.03074 2018 6 15 58284 0.1300 0.4970 0.03034 2018 6 16 58285 0.1324 0.4970 0.02998 2018 6 17 58286 0.1348 0.4969 0.02957 2018 6 18 58287 0.1372 0.4968 0.02908 2018 6 19 58288 0.1395 0.4966 0.02851 2018 6 20 58289 0.1419 0.4965 0.02789 2018 6 21 58290 0.1443 0.4962 0.02726 2018 6 22 58291 0.1466 0.4960 0.02671 2018 6 23 58292 0.1490 0.4957 0.02627 2018 6 24 58293 0.1513 0.4954 0.02599 2018 6 25 58294 0.1537 0.4950 0.02588 2018 6 26 58295 0.1560 0.4946 0.02593 2018 6 27 58296 0.1583 0.4942 0.02612 2018 6 28 58297 0.1607 0.4937 0.02639 2018 6 29 58298 0.1630 0.4932 0.02670 2018 6 30 58299 0.1653 0.4927 0.02699 2018 7 1 58300 0.1676 0.4921 0.02719 2018 7 2 58301 0.1698 0.4915 0.02725 2018 7 3 58302 0.1721 0.4909 0.02717 2018 7 4 58303 0.1743 0.4902 0.02693 2018 7 5 58304 0.1766 0.4895 0.02656 2018 7 6 58305 0.1788 0.4888 0.02608 2018 7 7 58306 0.1810 0.4880 0.02554 2018 7 8 58307 0.1832 0.4872 0.02498 2018 7 9 58308 0.1854 0.4864 0.02447 2018 7 10 58309 0.1876 0.4855 0.02405 2018 7 11 58310 0.1897 0.4846 0.02376 2018 7 12 58311 0.1918 0.4837 0.02357 2018 7 13 58312 0.1939 0.4827 0.02342 2018 7 14 58313 0.1960 0.4817 0.02321 2018 7 15 58314 0.1981 0.4807 0.02287 2018 7 16 58315 0.2002 0.4796 0.02238 2018 7 17 58316 0.2022 0.4786 0.02175 2018 7 18 58317 0.2042 0.4774 0.02103 2018 7 19 58318 0.2062 0.4763 0.02030 2018 7 20 58319 0.2082 0.4751 0.01963 2018 7 21 58320 0.2101 0.4739 0.01904 2018 7 22 58321 0.2120 0.4727 0.01857 2018 7 23 58322 0.2139 0.4714 0.01821 2018 7 24 58323 0.2158 0.4701 0.01794 2018 7 25 58324 0.2177 0.4688 0.01773 2018 7 26 58325 0.2195 0.4674 0.01755 2018 7 27 58326 0.2213 0.4660 0.01736 2018 7 28 58327 0.2231 0.4646 0.01712 2018 7 29 58328 0.2249 0.4632 0.01683 2018 7 30 58329 0.2266 0.4618 0.01648 2018 7 31 58330 0.2283 0.4603 0.01605 2018 8 1 58331 0.2300 0.4588 0.01557 2018 8 2 58332 0.2316 0.4572 0.01501 2018 8 3 58333 0.2332 0.4557 0.01431 2018 8 4 58334 0.2348 0.4541 0.01355 2018 8 5 58335 0.2364 0.4525 0.01281 2018 8 6 58336 0.2379 0.4508 0.01215 2018 8 7 58337 0.2394 0.4492 0.01163 2018 8 8 58338 0.2409 0.4475 0.01123 2018 8 9 58339 0.2423 0.4458 0.01087 2018 8 10 58340 0.2437 0.4441 0.01046 2018 8 11 58341 0.2451 0.4424 0.00988 2018 8 12 58342 0.2464 0.4406 0.00908 2018 8 13 58343 0.2477 0.4388 0.00809 2018 8 14 58344 0.2490 0.4370 0.00706 2018 8 15 58345 0.2503 0.4352 0.00601 2018 8 16 58346 0.2515 0.4334 0.00498 2018 8 17 58347 0.2527 0.4315 0.00410 2018 8 18 58348 0.2538 0.4296 0.00339 2018 8 19 58349 0.2549 0.4277 0.00287 2018 8 20 58350 0.2560 0.4258 0.00253 2018 8 21 58351 0.2571 0.4239 0.00232 2018 8 22 58352 0.2581 0.4220 0.00207 2018 8 23 58353 0.2590 0.4200 0.00180 2018 8 24 58354 0.2600 0.4181 0.00155 2018 8 25 58355 0.2609 0.4161 0.00129 2018 8 26 58356 0.2618 0.4141 0.00094 2018 8 27 58357 0.2626 0.4121 0.00043 2018 8 28 58358 0.2634 0.4100 -0.00024 2018 8 29 58359 0.2642 0.4080 -0.00101 2018 8 30 58360 0.2649 0.4060 -0.00185 2018 8 31 58361 0.2656 0.4039 -0.00277 2018 9 1 58362 0.2662 0.4019 -0.00372 2018 9 2 58363 0.2668 0.3998 -0.00473 2018 9 3 58364 0.2674 0.3977 -0.00566 2018 9 4 58365 0.2680 0.3956 -0.00652 2018 9 5 58366 0.2685 0.3935 -0.00735 2018 9 6 58367 0.2689 0.3914 -0.00817 2018 9 7 58368 0.2694 0.3893 -0.00908 2018 9 8 58369 0.2698 0.3872 -0.01012 2018 9 9 58370 0.2701 0.3850 -0.01144 2018 9 10 58371 0.2704 0.3829 -0.01296 2018 9 11 58372 0.2707 0.3808 -0.01459 2018 9 12 58373 0.2709 0.3786 -0.01616 2018 9 13 58374 0.2711 0.3765 -0.01756 2018 9 14 58375 0.2713 0.3743 -0.01880 2018 9 15 58376 0.2714 0.3722 -0.01984 2018 9 16 58377 0.2715 0.3700 -0.02064 2018 9 17 58378 0.2716 0.3679 -0.02120 2018 9 18 58379 0.2716 0.3657 -0.02165 2018 9 19 58380 0.2716 0.3636 -0.02211 2018 9 20 58381 0.2715 0.3614 -0.02262 2018 9 21 58382 0.2714 0.3593 -0.02319 2018 9 22 58383 0.2713 0.3571 -0.02386 2018 9 23 58384 0.2711 0.3550 -0.02458 2018 9 24 58385 0.2709 0.3529 -0.02547 2018 9 25 58386 0.2706 0.3507 -0.02647 2018 9 26 58387 0.2703 0.3486 -0.02761 2018 9 27 58388 0.2700 0.3465 -0.02884 2018 9 28 58389 0.2697 0.3443 -0.03003 2018 9 29 58390 0.2693 0.3422 -0.03117 2018 9 30 58391 0.2688 0.3401 -0.03224 2018 10 1 58392 0.2683 0.3380 -0.03319 2018 10 2 58393 0.2678 0.3359 -0.03406 2018 10 3 58394 0.2673 0.3338 -0.03496 2018 10 4 58395 0.2667 0.3317 -0.03593 2018 10 5 58396 0.2661 0.3297 -0.03703 2018 10 6 58397 0.2654 0.3276 -0.03838 2018 10 7 58398 0.2647 0.3255 -0.03987 2018 10 8 58399 0.2640 0.3235 -0.04146 2018 10 9 58400 0.2633 0.3215 -0.04309 2018 10 10 58401 0.2625 0.3195 -0.04464 2018 10 11 58402 0.2616 0.3175 -0.04605 2018 10 12 58403 0.2608 0.3155 -0.04730 2018 10 13 58404 0.2599 0.3135 -0.04839 2018 10 14 58405 0.2589 0.3115 -0.04938 2018 10 15 58406 0.2580 0.3096 -0.05032 2018 10 16 58407 0.2570 0.3076 -0.05121 2018 10 17 58408 0.2559 0.3057 -0.05203 2018 10 18 58409 0.2549 0.3038 -0.05286 2018 10 19 58410 0.2538 0.3019 -0.05378 2018 10 20 58411 0.2527 0.3001 -0.05484 2018 10 21 58412 0.2515 0.2982 -0.05605 2018 10 22 58413 0.2503 0.2964 -0.05736 2018 10 23 58414 0.2491 0.2945 -0.05873 2018 10 24 58415 0.2478 0.2927 -0.06017 2018 10 25 58416 0.2465 0.2910 -0.06159 2018 10 26 58417 0.2452 0.2892 -0.06291 2018 10 27 58418 0.2439 0.2875 -0.06409 2018 10 28 58419 0.2425 0.2858 -0.06518 2018 10 29 58420 0.2411 0.2841 -0.06618 2018 10 30 58421 0.2397 0.2824 -0.06709 2018 10 31 58422 0.2382 0.2807 -0.06801 2018 11 1 58423 0.2367 0.2791 -0.06907 2018 11 2 58424 0.2352 0.2775 -0.07032 2018 11 3 58425 0.2337 0.2759 -0.07180 2018 11 4 58426 0.2321 0.2743 -0.07339 2018 11 5 58427 0.2305 0.2728 -0.07508 2018 11 6 58428 0.2289 0.2713 -0.07679 2018 11 7 58429 0.2273 0.2698 -0.07844 2018 11 8 58430 0.2256 0.2684 -0.07999 2018 11 9 58431 0.2239 0.2669 -0.08149 2018 11 10 58432 0.2222 0.2655 -0.08288 2018 11 11 58433 0.2205 0.2641 -0.08415 2018 11 12 58434 0.2187 0.2628 -0.08532 2018 11 13 58435 0.2169 0.2614 -0.08645 2018 11 14 58436 0.2151 0.2601 -0.08757 2018 11 15 58437 0.2133 0.2589 -0.08872 2018 11 16 58438 0.2115 0.2576 -0.08993 2018 11 17 58439 0.2096 0.2564 -0.09123 2018 11 18 58440 0.2077 0.2552 -0.09262 2018 11 19 58441 0.2058 0.2540 -0.09410 2018 11 20 58442 0.2039 0.2529 -0.09566 2018 11 21 58443 0.2020 0.2518 -0.09721 2018 11 22 58444 0.2000 0.2507 -0.09870 2018 11 23 58445 0.1981 0.2497 -0.10009 2018 11 24 58446 0.1961 0.2487 -0.10133 2018 11 25 58447 0.1941 0.2477 -0.10243 2018 11 26 58448 0.1921 0.2467 -0.10345 2018 11 27 58449 0.1900 0.2458 -0.10445 2018 11 28 58450 0.1880 0.2449 -0.10555 2018 11 29 58451 0.1859 0.2441 -0.10676 2018 11 30 58452 0.1839 0.2433 -0.10813 2018 12 1 58453 0.1818 0.2425 -0.10963 2018 12 2 58454 0.1797 0.2417 -0.11122 2018 12 3 58455 0.1776 0.2410 -0.11283 2018 12 4 58456 0.1755 0.2403 -0.11437 2018 12 5 58457 0.1734 0.2396 -0.11581 2018 12 6 58458 0.1712 0.2390 -0.11708 2018 12 7 58459 0.1691 0.2384 -0.11815 2018 12 8 58460 0.1670 0.2378 -0.11903 2018 12 9 58461 0.1648 0.2373 -0.11983 2018 12 10 58462 0.1626 0.2368 -0.12058 2018 12 11 58463 0.1605 0.2363 -0.12140 2018 12 12 58464 0.1583 0.2359 -0.12230 2018 12 13 58465 0.1561 0.2355 -0.12329 2018 12 14 58466 0.1539 0.2351 -0.12438 2018 12 15 58467 0.1518 0.2348 -0.12559 2018 12 16 58468 0.1496 0.2345 -0.12690 2018 12 17 58469 0.1474 0.2342 -0.12829 2018 12 18 58470 0.1452 0.2340 -0.12977 2018 12 19 58471 0.1430 0.2338 -0.13127 2018 12 20 58472 0.1408 0.2336 -0.13269 2018 12 21 58473 0.1386 0.2335 -0.13401 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).