********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 12 October 2017 Vol. XXX No. 041 ______________________________________________________________________ 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 = +0.3 seconds beginning 29 Jun 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 10 6 58032 0.22144 .00009 0.29388 .00009 0.310712 0.000015 17 10 7 58033 0.22012 .00009 0.29303 .00009 0.309534 0.000013 17 10 8 58034 0.21830 .00009 0.29204 .00009 0.308377 0.000010 17 10 9 58035 0.21620 .00009 0.29077 .00009 0.307343 0.000005 17 10 10 58036 0.21413 .00009 0.28916 .00009 0.306451 0.000004 17 10 11 58037 0.21216 .00009 0.28737 .00009 0.305667 0.000004 17 10 12 58038 0.21022 .00009 0.28544 .00009 0.304927 0.000003 _______________________________________________________________________ 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 = 0.1162 + 0.1234 cos A - 0.0716 sin A - 0.0284 cos C - 0.0025 sin C y = 0.3498 - 0.0591 cos A - 0.1118 sin A - 0.0025 cos C + 0.0284 sin C UT1-UTC = 0.2819 - 0.00107 (MJD - 58046) - (UT2-UT1) where A = 2*pi*(MJD-58038)/365.25 and C = 2*pi*(MJD-58038)/435. TAI-UTC(MJD 58039) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58038)**0.80 S t = 0.00025 (MJD-58038)**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 10 13 58039 0.2085 0.2836 0.30415 2017 10 14 58040 0.2068 0.2819 0.30329 2017 10 15 58041 0.2053 0.2803 0.30230 2017 10 16 58042 0.2037 0.2789 0.30116 2017 10 17 58043 0.2022 0.2776 0.29990 2017 10 18 58044 0.2006 0.2762 0.29857 2017 10 19 58045 0.1990 0.2749 0.29724 2017 10 20 58046 0.1973 0.2736 0.29597 2017 10 21 58047 0.1956 0.2723 0.29480 2017 10 22 58048 0.1939 0.2711 0.29374 2017 10 23 58049 0.1923 0.2698 0.29284 2017 10 24 58050 0.1907 0.2687 0.29208 2017 10 25 58051 0.1891 0.2676 0.29144 2017 10 26 58052 0.1875 0.2666 0.29086 2017 10 27 58053 0.1857 0.2656 0.29029 2017 10 28 58054 0.1839 0.2647 0.28967 2017 10 29 58055 0.1821 0.2638 0.28896 2017 10 30 58056 0.1802 0.2629 0.28810 2017 10 31 58057 0.1783 0.2619 0.28703 2017 11 1 58058 0.1763 0.2610 0.28579 2017 11 2 58059 0.1744 0.2602 0.28440 2017 11 3 58060 0.1725 0.2593 0.28292 2017 11 4 58061 0.1706 0.2585 0.28143 2017 11 5 58062 0.1687 0.2578 0.28001 2017 11 6 58063 0.1667 0.2570 0.27870 2017 11 7 58064 0.1648 0.2563 0.27754 2017 11 8 58065 0.1628 0.2557 0.27647 2017 11 9 58066 0.1608 0.2551 0.27544 2017 11 10 58067 0.1588 0.2544 0.27438 2017 11 11 58068 0.1568 0.2539 0.27326 2017 11 12 58069 0.1548 0.2533 0.27204 2017 11 13 58070 0.1527 0.2528 0.27076 2017 11 14 58071 0.1507 0.2523 0.26944 2017 11 15 58072 0.1487 0.2519 0.26812 2017 11 16 58073 0.1466 0.2515 0.26686 2017 11 17 58074 0.1445 0.2511 0.26569 2017 11 18 58075 0.1424 0.2507 0.26464 2017 11 19 58076 0.1404 0.2504 0.26370 2017 11 20 58077 0.1382 0.2501 0.26289 2017 11 21 58078 0.1361 0.2499 0.26216 2017 11 22 58079 0.1340 0.2497 0.26148 2017 11 23 58080 0.1319 0.2495 0.26082 2017 11 24 58081 0.1298 0.2493 0.26011 2017 11 25 58082 0.1277 0.2492 0.25931 2017 11 26 58083 0.1255 0.2491 0.25838 2017 11 27 58084 0.1234 0.2490 0.25730 2017 11 28 58085 0.1212 0.2490 0.25606 2017 11 29 58086 0.1191 0.2490 0.25466 2017 11 30 58087 0.1170 0.2490 0.25315 2017 12 1 58088 0.1148 0.2491 0.25158 2017 12 2 58089 0.1127 0.2492 0.25003 2017 12 3 58090 0.1105 0.2493 0.24858 2017 12 4 58091 0.1084 0.2495 0.24726 2017 12 5 58092 0.1063 0.2497 0.24606 2017 12 6 58093 0.1041 0.2499 0.24493 2017 12 7 58094 0.1020 0.2501 0.24379 2017 12 8 58095 0.0998 0.2504 0.24259 2017 12 9 58096 0.0977 0.2508 0.24130 2017 12 10 58097 0.0956 0.2511 0.23993 2017 12 11 58098 0.0935 0.2515 0.23852 2017 12 12 58099 0.0913 0.2519 0.23711 2017 12 13 58100 0.0892 0.2524 0.23576 2017 12 14 58101 0.0871 0.2528 0.23449 2017 12 15 58102 0.0850 0.2534 0.23334 2017 12 16 58103 0.0830 0.2539 0.23230 2017 12 17 58104 0.0809 0.2545 0.23139 2017 12 18 58105 0.0788 0.2551 0.23057 2017 12 19 58106 0.0767 0.2557 0.22982 2017 12 20 58107 0.0747 0.2564 0.22910 2017 12 21 58108 0.0726 0.2571 0.22838 2017 12 22 58109 0.0706 0.2578 0.22759 2017 12 23 58110 0.0686 0.2586 0.22671 2017 12 24 58111 0.0666 0.2594 0.22571 2017 12 25 58112 0.0646 0.2602 0.22456 2017 12 26 58113 0.0626 0.2611 0.22328 2017 12 27 58114 0.0607 0.2620 0.22189 2017 12 28 58115 0.0587 0.2629 0.22042 2017 12 29 58116 0.0568 0.2638 0.21894 2017 12 30 58117 0.0548 0.2648 0.21751 2017 12 31 58118 0.0529 0.2658 0.21617 2018 1 1 58119 0.0511 0.2668 0.21494 2018 1 2 58120 0.0492 0.2679 0.21378 2018 1 3 58121 0.0473 0.2690 0.21263 2018 1 4 58122 0.0455 0.2701 0.21142 2018 1 5 58123 0.0437 0.2712 0.21011 2018 1 6 58124 0.0419 0.2724 0.20870 2018 1 7 58125 0.0401 0.2736 0.20723 2018 1 8 58126 0.0384 0.2748 0.20576 2018 1 9 58127 0.0366 0.2761 0.20433 2018 1 10 58128 0.0349 0.2773 0.20300 2018 1 11 58129 0.0332 0.2786 0.20178 2018 1 12 58130 0.0316 0.2800 0.20068 2018 1 13 58131 0.0299 0.2813 0.19970 2018 1 14 58132 0.0283 0.2827 0.19883 2018 1 15 58133 0.0267 0.2841 0.19803 2018 1 16 58134 0.0251 0.2855 0.19726 2018 1 17 58135 0.0236 0.2870 0.19649 2018 1 18 58136 0.0221 0.2885 0.19565 2018 1 19 58137 0.0206 0.2900 0.19472 2018 1 20 58138 0.0191 0.2915 0.19367 2018 1 21 58139 0.0176 0.2930 0.19248 2018 1 22 58140 0.0162 0.2946 0.19116 2018 1 23 58141 0.0148 0.2962 0.18973 2018 1 24 58142 0.0135 0.2978 0.18824 2018 1 25 58143 0.0121 0.2994 0.18673 2018 1 26 58144 0.0108 0.3011 0.18526 2018 1 27 58145 0.0096 0.3028 0.18387 2018 1 28 58146 0.0083 0.3045 0.18257 2018 1 29 58147 0.0071 0.3062 0.18145 2018 1 30 58148 0.0059 0.3079 0.18034 2018 1 31 58149 0.0048 0.3097 0.17918 2018 2 1 58150 0.0036 0.3114 0.17790 2018 2 2 58151 0.0025 0.3132 0.17649 2018 2 3 58152 0.0015 0.3150 0.17497 2018 2 4 58153 0.0004 0.3168 0.17340 2018 2 5 58154 -0.0006 0.3187 0.17185 2018 2 6 58155 -0.0015 0.3205 0.17037 2018 2 7 58156 -0.0025 0.3224 0.16901 2018 2 8 58157 -0.0034 0.3243 0.16778 2018 2 9 58158 -0.0042 0.3262 0.16667 2018 2 10 58159 -0.0051 0.3281 0.16568 2018 2 11 58160 -0.0059 0.3300 0.16475 2018 2 12 58161 -0.0066 0.3319 0.16387 2018 2 13 58162 -0.0074 0.3339 0.16298 2018 2 14 58163 -0.0081 0.3358 0.16204 2018 2 15 58164 -0.0087 0.3378 0.16101 2018 2 16 58165 -0.0093 0.3398 0.15985 2018 2 17 58166 -0.0099 0.3418 0.15855 2018 2 18 58167 -0.0105 0.3438 0.15711 2018 2 19 58168 -0.0110 0.3458 0.15555 2018 2 20 58169 -0.0115 0.3478 0.15392 2018 2 21 58170 -0.0120 0.3498 0.15227 2018 2 22 58171 -0.0124 0.3518 0.15066 2018 2 23 58172 -0.0127 0.3539 0.14911 2018 2 24 58173 -0.0131 0.3559 0.14766 2018 2 25 58174 -0.0134 0.3580 0.14628 2018 2 26 58175 -0.0137 0.3600 0.14494 2018 2 27 58176 -0.0139 0.3621 0.14356 2018 2 28 58177 -0.0141 0.3642 0.14207 2018 3 1 58178 -0.0143 0.3662 0.14045 2018 3 2 58179 -0.0144 0.3683 0.13868 2018 3 3 58180 -0.0145 0.3704 0.13681 2018 3 4 58181 -0.0145 0.3725 0.13491 2018 3 5 58182 -0.0145 0.3745 0.13306 2018 3 6 58183 -0.0145 0.3766 0.13131 2018 3 7 58184 -0.0144 0.3787 0.12969 2018 3 8 58185 -0.0143 0.3808 0.12822 2018 3 9 58186 -0.0142 0.3829 0.12688 2018 3 10 58187 -0.0140 0.3849 0.12563 2018 3 11 58188 -0.0138 0.3870 0.12445 2018 3 12 58189 -0.0136 0.3891 0.12329 2018 3 13 58190 -0.0133 0.3912 0.12209 2018 3 14 58191 -0.0130 0.3932 0.12081 2018 3 15 58192 -0.0126 0.3953 0.11941 2018 3 16 58193 -0.0122 0.3973 0.11788 2018 3 17 58194 -0.0118 0.3994 0.11619 2018 3 18 58195 -0.0113 0.4014 0.11437 2018 3 19 58196 -0.0108 0.4035 0.11246 2018 3 20 58197 -0.0103 0.4055 0.11053 2018 3 21 58198 -0.0097 0.4076 0.10863 2018 3 22 58199 -0.0091 0.4096 0.10683 2018 3 23 58200 -0.0084 0.4116 0.10513 2018 3 24 58201 -0.0077 0.4136 0.10353 2018 3 25 58202 -0.0070 0.4156 0.10200 2018 3 26 58203 -0.0062 0.4176 0.10047 2018 3 27 58204 -0.0054 0.4195 0.09887 2018 3 28 58205 -0.0046 0.4215 0.09714 2018 3 29 58206 -0.0038 0.4234 0.09528 2018 3 30 58207 -0.0029 0.4254 0.09329 2018 3 31 58208 -0.0019 0.4273 0.09123 2018 4 1 58209 -0.0009 0.4292 0.08918 2018 4 2 58210 0.0001 0.4311 0.08720 2018 4 3 58211 0.0011 0.4330 0.08535 2018 4 4 58212 0.0022 0.4349 0.08365 2018 4 5 58213 0.0033 0.4367 0.08209 2018 4 6 58214 0.0044 0.4386 0.08066 2018 4 7 58215 0.0056 0.4404 0.07931 2018 4 8 58216 0.0068 0.4422 0.07800 2018 4 9 58217 0.0080 0.4440 0.07667 2018 4 10 58218 0.0093 0.4458 0.07529 2018 4 11 58219 0.0106 0.4475 0.07379 2018 4 12 58220 0.0119 0.4492 0.07216 2018 4 13 58221 0.0133 0.4510 0.07036 2018 4 14 58222 0.0146 0.4527 0.06839 2018 4 15 58223 0.0161 0.4543 0.06629 2018 4 16 58224 0.0175 0.4560 0.06410 2018 4 17 58225 0.0190 0.4576 0.06190 2018 4 18 58226 0.0205 0.4592 0.05975 2018 4 19 58227 0.0220 0.4608 0.05769 2018 4 20 58228 0.0236 0.4624 0.05575 2018 4 21 58229 0.0252 0.4639 0.05390 2018 4 22 58230 0.0268 0.4655 0.05208 2018 4 23 58231 0.0285 0.4670 0.05027 2018 4 24 58232 0.0302 0.4684 0.04840 2018 4 25 58233 0.0319 0.4699 0.04646 2018 4 26 58234 0.0336 0.4713 0.04446 2018 4 27 58235 0.0353 0.4727 0.04244 2018 4 28 58236 0.0371 0.4741 0.04044 2018 4 29 58237 0.0389 0.4754 0.03853 2018 4 30 58238 0.0407 0.4768 0.03676 2018 5 1 58239 0.0426 0.4781 0.03517 2018 5 2 58240 0.0445 0.4793 0.03377 2018 5 3 58241 0.0464 0.4806 0.03256 2018 5 4 58242 0.0483 0.4818 0.03152 2018 5 5 58243 0.0502 0.4830 0.03061 2018 5 6 58244 0.0522 0.4841 0.02978 2018 5 7 58245 0.0542 0.4853 0.02898 2018 5 8 58246 0.0562 0.4864 0.02814 2018 5 9 58247 0.0582 0.4875 0.02723 2018 5 10 58248 0.0602 0.4885 0.02620 2018 5 11 58249 0.0623 0.4895 0.02504 2018 5 12 58250 0.0643 0.4905 0.02377 2018 5 13 58251 0.0664 0.4915 0.02242 2018 5 14 58252 0.0685 0.4924 0.02105 2018 5 15 58253 0.0707 0.4933 0.01975 2018 5 16 58254 0.0728 0.4941 0.01856 2018 5 17 58255 0.0750 0.4950 0.01751 2018 5 18 58256 0.0771 0.4958 0.01658 2018 5 19 58257 0.0793 0.4965 0.01571 2018 5 20 58258 0.0815 0.4973 0.01485 2018 5 21 58259 0.0837 0.4980 0.01395 2018 5 22 58260 0.0859 0.4986 0.01300 2018 5 23 58261 0.0882 0.4993 0.01199 2018 5 24 58262 0.0904 0.4999 0.01093 2018 5 25 58263 0.0927 0.5004 0.00987 2018 5 26 58264 0.0949 0.5010 0.00885 2018 5 27 58265 0.0972 0.5015 0.00788 2018 5 28 58266 0.0995 0.5020 0.00700 2018 5 29 58267 0.1018 0.5024 0.00627 2018 5 30 58268 0.1041 0.5028 0.00575 2018 5 31 58269 0.1064 0.5032 0.00540 2018 6 1 58270 0.1087 0.5035 0.00516 2018 6 2 58271 0.1110 0.5038 0.00495 2018 6 3 58272 0.1133 0.5041 0.00473 2018 6 4 58273 0.1157 0.5043 0.00450 2018 6 5 58274 0.1180 0.5045 0.00424 2018 6 6 58275 0.1203 0.5047 0.00386 2018 6 7 58276 0.1227 0.5048 0.00340 2018 6 8 58277 0.1250 0.5049 0.00288 2018 6 9 58278 0.1273 0.5050 0.00229 2018 6 10 58279 0.1297 0.5050 0.00163 2018 6 11 58280 0.1320 0.5050 0.00098 2018 6 12 58281 0.1344 0.5050 0.00045 2018 6 13 58282 0.1367 0.5049 0.00005 2018 6 14 58283 0.1390 0.5048 -0.00025 2018 6 15 58284 0.1414 0.5047 -0.00051 2018 6 16 58285 0.1437 0.5045 -0.00081 2018 6 17 58286 0.1460 0.5043 -0.00115 2018 6 18 58287 0.1483 0.5040 -0.00158 2018 6 19 58288 0.1506 0.5038 -0.00216 2018 6 20 58289 0.1530 0.5034 -0.00284 2018 6 21 58290 0.1553 0.5031 -0.00360 2018 6 22 58291 0.1576 0.5027 -0.00441 2018 6 23 58292 0.1598 0.5023 -0.00518 2018 6 24 58293 0.1621 0.5019 -0.00585 2018 6 25 58294 0.1644 0.5014 -0.00635 2018 6 26 58295 0.1667 0.5009 -0.00670 2018 6 27 58296 0.1689 0.5003 -0.00689 2018 6 28 58297 0.1712 0.4997 -0.00696 2018 6 29 58298 0.1734 0.4991 -0.00692 2018 6 30 58299 0.1756 0.4985 -0.00685 2018 7 1 58300 0.1778 0.4978 -0.00678 2018 7 2 58301 0.1800 0.4971 -0.00677 2018 7 3 58302 0.1822 0.4964 -0.00686 2018 7 4 58303 0.1844 0.4956 -0.00702 2018 7 5 58304 0.1865 0.4948 -0.00727 2018 7 6 58305 0.1886 0.4939 -0.00759 2018 7 7 58306 0.1908 0.4931 -0.00796 2018 7 8 58307 0.1929 0.4922 -0.00834 2018 7 9 58308 0.1949 0.4912 -0.00868 2018 7 10 58309 0.1970 0.4903 -0.00894 2018 7 11 58310 0.1991 0.4893 -0.00912 2018 7 12 58311 0.2011 0.4883 -0.00920 2018 7 13 58312 0.2031 0.4872 -0.00928 2018 7 14 58313 0.2051 0.4861 -0.00940 2018 7 15 58314 0.2071 0.4850 -0.00967 2018 7 16 58315 0.2090 0.4839 -0.01010 2018 7 17 58316 0.2110 0.4827 -0.01064 2018 7 18 58317 0.2129 0.4815 -0.01126 2018 7 19 58318 0.2148 0.4803 -0.01185 2018 7 20 58319 0.2166 0.4790 -0.01232 2018 7 21 58320 0.2185 0.4777 -0.01261 2018 7 22 58321 0.2203 0.4764 -0.01278 2018 7 23 58322 0.2221 0.4751 -0.01283 2018 7 24 58323 0.2239 0.4737 -0.01282 2018 7 25 58324 0.2256 0.4724 -0.01276 2018 7 26 58325 0.2273 0.4709 -0.01265 2018 7 27 58326 0.2290 0.4695 -0.01253 2018 7 28 58327 0.2307 0.4680 -0.01246 2018 7 29 58328 0.2323 0.4666 -0.01245 2018 7 30 58329 0.2339 0.4650 -0.01255 2018 7 31 58330 0.2355 0.4635 -0.01282 2018 8 1 58331 0.2371 0.4620 -0.01321 2018 8 2 58332 0.2386 0.4604 -0.01369 2018 8 3 58333 0.2401 0.4588 -0.01423 2018 8 4 58334 0.2415 0.4572 -0.01482 2018 8 5 58335 0.2430 0.4555 -0.01542 2018 8 6 58336 0.2444 0.4538 -0.01591 2018 8 7 58337 0.2458 0.4522 -0.01631 2018 8 8 58338 0.2471 0.4505 -0.01664 2018 8 9 58339 0.2484 0.4487 -0.01691 2018 8 10 58340 0.2497 0.4470 -0.01720 2018 8 11 58341 0.2510 0.4452 -0.01763 2018 8 12 58342 0.2522 0.4434 -0.01821 2018 8 13 58343 0.2534 0.4416 -0.01895 2018 8 14 58344 0.2545 0.4398 -0.01980 2018 8 15 58345 0.2556 0.4380 -0.02067 2018 8 16 58346 0.2567 0.4361 -0.02150 2018 8 17 58347 0.2578 0.4343 -0.02221 2018 8 18 58348 0.2588 0.4324 -0.02277 2018 8 19 58349 0.2598 0.4305 -0.02315 2018 8 20 58350 0.2607 0.4286 -0.02339 2018 8 21 58351 0.2616 0.4267 -0.02353 2018 8 22 58352 0.2625 0.4247 -0.02363 2018 8 23 58353 0.2634 0.4228 -0.02377 2018 8 24 58354 0.2642 0.4208 -0.02400 2018 8 25 58355 0.2649 0.4188 -0.02429 2018 8 26 58356 0.2657 0.4169 -0.02464 2018 8 27 58357 0.2664 0.4149 -0.02512 2018 8 28 58358 0.2670 0.4129 -0.02579 2018 8 29 58359 0.2677 0.4108 -0.02660 2018 8 30 58360 0.2683 0.4088 -0.02753 2018 8 31 58361 0.2688 0.4068 -0.02850 2018 9 1 58362 0.2693 0.4047 -0.02945 2018 9 2 58363 0.2698 0.4027 -0.03034 2018 9 3 58364 0.2702 0.4006 -0.03119 2018 9 4 58365 0.2707 0.3986 -0.03201 2018 9 5 58366 0.2710 0.3965 -0.03283 2018 9 6 58367 0.2713 0.3945 -0.03367 2018 9 7 58368 0.2716 0.3924 -0.03466 2018 9 8 58369 0.2719 0.3903 -0.03583 2018 9 9 58370 0.2721 0.3882 -0.03718 2018 9 10 58371 0.2723 0.3861 -0.03867 2018 9 11 58372 0.2724 0.3841 -0.04021 2018 9 12 58373 0.2725 0.3820 -0.04175 2018 9 13 58374 0.2726 0.3799 -0.04320 2018 9 14 58375 0.2726 0.3778 -0.04450 2018 9 15 58376 0.2726 0.3757 -0.04562 2018 9 16 58377 0.2726 0.3736 -0.04654 2018 9 17 58378 0.2725 0.3715 -0.04730 2018 9 18 58379 0.2724 0.3694 -0.04797 2018 9 19 58380 0.2722 0.3674 -0.04855 2018 9 20 58381 0.2720 0.3653 -0.04913 2018 9 21 58382 0.2718 0.3632 -0.04975 2018 9 22 58383 0.2715 0.3611 -0.05047 2018 9 23 58384 0.2712 0.3591 -0.05132 2018 9 24 58385 0.2709 0.3570 -0.05239 2018 9 25 58386 0.2705 0.3549 -0.05368 2018 9 26 58387 0.2701 0.3529 -0.05511 2018 9 27 58388 0.2696 0.3508 -0.05664 2018 9 28 58389 0.2691 0.3488 -0.05819 2018 9 29 58390 0.2686 0.3468 -0.05968 2018 9 30 58391 0.2680 0.3448 -0.06110 2018 10 1 58392 0.2674 0.3427 -0.06243 2018 10 2 58393 0.2668 0.3407 -0.06373 2018 10 3 58394 0.2661 0.3388 -0.06501 2018 10 4 58395 0.2654 0.3368 -0.06629 2018 10 5 58396 0.2646 0.3348 -0.06766 2018 10 6 58397 0.2639 0.3328 -0.06918 2018 10 7 58398 0.2631 0.3309 -0.07087 2018 10 8 58399 0.2622 0.3290 -0.07267 2018 10 9 58400 0.2613 0.3270 -0.07450 2018 10 10 58401 0.2604 0.3251 -0.07629 2018 10 11 58402 0.2594 0.3232 -0.07793 2018 10 12 58403 0.2585 0.3214 -0.07936 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) 58016 -110.34 0.30 -11.65 0.03 58017 -110.38 0.30 -11.65 0.03 58018 -110.49 0.30 -11.62 0.03 58019 -110.63 0.30 -11.55 0.05 58020 -110.69 0.30 -11.54 0.10 58021 -110.53 0.30 -11.61 0.10 58022 -110.09 0.25 -11.68 0.21 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58016 0.219 0.119 0.153 0.030 58017 0.217 0.119 0.145 0.030 58018 0.216 0.119 0.146 0.030 58019 0.216 0.119 0.171 0.050 58020 0.219 0.119 0.192 0.100 58021 0.226 0.119 0.220 0.100 58022 0.250 0.099 0.274 0.210 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).