********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 19 October 2017 Vol. XXX No. 042 ______________________________________________________________________ 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 13 58039 0.20867 .00009 0.28347 .00009 0.304149 0.000008 17 10 14 58040 0.20715 .00009 0.28158 .00009 0.303281 0.000009 17 10 15 58041 0.20579 .00009 0.27980 .00009 0.302307 0.000010 17 10 16 58042 0.20475 .00009 0.27823 .00009 0.301196 0.000006 17 10 17 58043 0.20375 .00009 0.27686 .00009 0.299938 0.000007 17 10 18 58044 0.20253 .00009 0.27539 .00009 0.298574 0.000006 17 10 19 58045 0.20121 .00009 0.27376 .00009 0.297184 0.000006 _______________________________________________________________________ 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 = 0.1169 + 0.1141 cos A - 0.0843 sin A - 0.0278 cos C - 0.0010 sin C y = 0.3470 - 0.0710 cos A - 0.1038 sin A - 0.0010 cos C + 0.0278 sin C UT1-UTC = 0.2769 - 0.00106 (MJD - 58053) - (UT2-UT1) where A = 2*pi*(MJD-58045)/365.25 and C = 2*pi*(MJD-58045)/435. TAI-UTC(MJD 58046) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58045)**0.80 S t = 0.00025 (MJD-58045)**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 20 58046 0.1998 0.2722 0.29585 2017 10 21 58047 0.1983 0.2707 0.29463 2017 10 22 58048 0.1968 0.2692 0.29354 2017 10 23 58049 0.1953 0.2678 0.29256 2017 10 24 58050 0.1938 0.2665 0.29169 2017 10 25 58051 0.1923 0.2653 0.29092 2017 10 26 58052 0.1907 0.2642 0.29021 2017 10 27 58053 0.1890 0.2631 0.28949 2017 10 28 58054 0.1874 0.2620 0.28871 2017 10 29 58055 0.1856 0.2611 0.28780 2017 10 30 58056 0.1838 0.2601 0.28674 2017 10 31 58057 0.1820 0.2592 0.28550 2017 11 1 58058 0.1800 0.2583 0.28410 2017 11 2 58059 0.1780 0.2575 0.28258 2017 11 3 58060 0.1761 0.2566 0.28102 2017 11 4 58061 0.1741 0.2557 0.27951 2017 11 5 58062 0.1722 0.2549 0.27813 2017 11 6 58063 0.1702 0.2541 0.27690 2017 11 7 58064 0.1683 0.2533 0.27585 2017 11 8 58065 0.1664 0.2525 0.27491 2017 11 9 58066 0.1644 0.2518 0.27403 2017 11 10 58067 0.1625 0.2510 0.27310 2017 11 11 58068 0.1605 0.2504 0.27209 2017 11 12 58069 0.1584 0.2497 0.27098 2017 11 13 58070 0.1564 0.2491 0.26979 2017 11 14 58071 0.1544 0.2486 0.26856 2017 11 15 58072 0.1523 0.2480 0.26732 2017 11 16 58073 0.1503 0.2475 0.26611 2017 11 17 58074 0.1482 0.2471 0.26498 2017 11 18 58075 0.1462 0.2467 0.26396 2017 11 19 58076 0.1441 0.2463 0.26306 2017 11 20 58077 0.1420 0.2460 0.26227 2017 11 21 58078 0.1399 0.2457 0.26158 2017 11 22 58079 0.1378 0.2454 0.26093 2017 11 23 58080 0.1356 0.2452 0.26031 2017 11 24 58081 0.1335 0.2450 0.25965 2017 11 25 58082 0.1313 0.2448 0.25891 2017 11 26 58083 0.1292 0.2447 0.25806 2017 11 27 58084 0.1270 0.2446 0.25708 2017 11 28 58085 0.1248 0.2445 0.25595 2017 11 29 58086 0.1227 0.2445 0.25469 2017 11 30 58087 0.1205 0.2445 0.25332 2017 12 1 58088 0.1184 0.2445 0.25191 2017 12 2 58089 0.1162 0.2445 0.25054 2017 12 3 58090 0.1140 0.2446 0.24926 2017 12 4 58091 0.1119 0.2447 0.24811 2017 12 5 58092 0.1097 0.2449 0.24708 2017 12 6 58093 0.1075 0.2451 0.24610 2017 12 7 58094 0.1054 0.2453 0.24510 2017 12 8 58095 0.1032 0.2455 0.24403 2017 12 9 58096 0.1011 0.2458 0.24287 2017 12 10 58097 0.0989 0.2462 0.24163 2017 12 11 58098 0.0968 0.2465 0.24033 2017 12 12 58099 0.0946 0.2469 0.23904 2017 12 13 58100 0.0925 0.2473 0.23779 2017 12 14 58101 0.0903 0.2478 0.23662 2017 12 15 58102 0.0882 0.2483 0.23556 2017 12 16 58103 0.0861 0.2488 0.23462 2017 12 17 58104 0.0840 0.2493 0.23379 2017 12 18 58105 0.0819 0.2499 0.23305 2017 12 19 58106 0.0798 0.2505 0.23238 2017 12 20 58107 0.0777 0.2512 0.23172 2017 12 21 58108 0.0756 0.2518 0.23105 2017 12 22 58109 0.0736 0.2526 0.23030 2017 12 23 58110 0.0715 0.2533 0.22945 2017 12 24 58111 0.0695 0.2541 0.22848 2017 12 25 58112 0.0675 0.2549 0.22737 2017 12 26 58113 0.0654 0.2557 0.22613 2017 12 27 58114 0.0634 0.2566 0.22477 2017 12 28 58115 0.0615 0.2574 0.22336 2017 12 29 58116 0.0595 0.2584 0.22193 2017 12 30 58117 0.0575 0.2593 0.22057 2017 12 31 58118 0.0556 0.2603 0.21931 2018 1 1 58119 0.0537 0.2613 0.21816 2018 1 2 58120 0.0518 0.2623 0.21709 2018 1 3 58121 0.0499 0.2634 0.21602 2018 1 4 58122 0.0480 0.2645 0.21489 2018 1 5 58123 0.0462 0.2656 0.21366 2018 1 6 58124 0.0443 0.2668 0.21233 2018 1 7 58125 0.0425 0.2680 0.21094 2018 1 8 58126 0.0407 0.2692 0.20953 2018 1 9 58127 0.0389 0.2704 0.20816 2018 1 10 58128 0.0372 0.2717 0.20688 2018 1 11 58129 0.0355 0.2730 0.20570 2018 1 12 58130 0.0338 0.2743 0.20465 2018 1 13 58131 0.0321 0.2756 0.20371 2018 1 14 58132 0.0304 0.2770 0.20286 2018 1 15 58133 0.0288 0.2784 0.20209 2018 1 16 58134 0.0272 0.2798 0.20134 2018 1 17 58135 0.0256 0.2813 0.20059 2018 1 18 58136 0.0240 0.2827 0.19977 2018 1 19 58137 0.0225 0.2842 0.19886 2018 1 20 58138 0.0210 0.2857 0.19783 2018 1 21 58139 0.0195 0.2873 0.19666 2018 1 22 58140 0.0180 0.2888 0.19536 2018 1 23 58141 0.0166 0.2904 0.19395 2018 1 24 58142 0.0152 0.2920 0.19248 2018 1 25 58143 0.0138 0.2936 0.19099 2018 1 26 58144 0.0124 0.2953 0.18953 2018 1 27 58145 0.0111 0.2969 0.18815 2018 1 28 58146 0.0098 0.2986 0.18685 2018 1 29 58147 0.0086 0.3003 0.18562 2018 1 30 58148 0.0073 0.3021 0.18441 2018 1 31 58149 0.0061 0.3038 0.18313 2018 2 1 58150 0.0050 0.3056 0.18174 2018 2 2 58151 0.0038 0.3073 0.18022 2018 2 3 58152 0.0027 0.3091 0.17859 2018 2 4 58153 0.0016 0.3110 0.17692 2018 2 5 58154 0.0006 0.3128 0.17538 2018 2 6 58155 -0.0004 0.3146 0.17392 2018 2 7 58156 -0.0014 0.3165 0.17257 2018 2 8 58157 -0.0023 0.3184 0.17135 2018 2 9 58158 -0.0033 0.3203 0.17026 2018 2 10 58159 -0.0041 0.3222 0.16928 2018 2 11 58160 -0.0050 0.3241 0.16838 2018 2 12 58161 -0.0058 0.3260 0.16751 2018 2 13 58162 -0.0066 0.3280 0.16665 2018 2 14 58163 -0.0073 0.3299 0.16573 2018 2 15 58164 -0.0080 0.3319 0.16472 2018 2 16 58165 -0.0087 0.3339 0.16359 2018 2 17 58166 -0.0094 0.3359 0.16231 2018 2 18 58167 -0.0100 0.3379 0.16089 2018 2 19 58168 -0.0105 0.3399 0.15936 2018 2 20 58169 -0.0111 0.3419 0.15775 2018 2 21 58170 -0.0116 0.3440 0.15613 2018 2 22 58171 -0.0120 0.3460 0.15453 2018 2 23 58172 -0.0125 0.3480 0.15301 2018 2 24 58173 -0.0128 0.3501 0.15157 2018 2 25 58174 -0.0132 0.3522 0.15021 2018 2 26 58175 -0.0135 0.3542 0.14888 2018 2 27 58176 -0.0138 0.3563 0.14752 2018 2 28 58177 -0.0140 0.3584 0.14604 2018 3 1 58178 -0.0142 0.3604 0.14443 2018 3 2 58179 -0.0144 0.3625 0.14266 2018 3 3 58180 -0.0146 0.3646 0.14080 2018 3 4 58181 -0.0147 0.3667 0.13890 2018 3 5 58182 -0.0147 0.3688 0.13706 2018 3 6 58183 -0.0147 0.3709 0.13531 2018 3 7 58184 -0.0147 0.3730 0.13370 2018 3 8 58185 -0.0147 0.3751 0.13223 2018 3 9 58186 -0.0146 0.3772 0.13088 2018 3 10 58187 -0.0145 0.3793 0.12964 2018 3 11 58188 -0.0143 0.3813 0.12846 2018 3 12 58189 -0.0141 0.3834 0.12730 2018 3 13 58190 -0.0139 0.3855 0.12610 2018 3 14 58191 -0.0136 0.3876 0.12483 2018 3 15 58192 -0.0133 0.3897 0.12344 2018 3 16 58193 -0.0129 0.3918 0.12191 2018 3 17 58194 -0.0126 0.3938 0.12024 2018 3 18 58195 -0.0121 0.3959 0.11843 2018 3 19 58196 -0.0117 0.3980 0.11655 2018 3 20 58197 -0.0112 0.4000 0.11463 2018 3 21 58198 -0.0107 0.4021 0.11276 2018 3 22 58199 -0.0101 0.4041 0.11097 2018 3 23 58200 -0.0095 0.4061 0.10930 2018 3 24 58201 -0.0089 0.4082 0.10773 2018 3 25 58202 -0.0082 0.4102 0.10623 2018 3 26 58203 -0.0075 0.4122 0.10472 2018 3 27 58204 -0.0067 0.4142 0.10315 2018 3 28 58205 -0.0059 0.4162 0.10145 2018 3 29 58206 -0.0051 0.4181 0.09961 2018 3 30 58207 -0.0043 0.4201 0.09765 2018 3 31 58208 -0.0034 0.4220 0.09562 2018 4 1 58209 -0.0025 0.4240 0.09360 2018 4 2 58210 -0.0015 0.4259 0.09166 2018 4 3 58211 -0.0005 0.4278 0.08984 2018 4 4 58212 0.0005 0.4297 0.08817 2018 4 5 58213 0.0015 0.4316 0.08665 2018 4 6 58214 0.0026 0.4335 0.08525 2018 4 7 58215 0.0037 0.4353 0.08395 2018 4 8 58216 0.0049 0.4371 0.08269 2018 4 9 58217 0.0061 0.4390 0.08142 2018 4 10 58218 0.0073 0.4408 0.08010 2018 4 11 58219 0.0086 0.4425 0.07869 2018 4 12 58220 0.0098 0.4443 0.07714 2018 4 13 58221 0.0111 0.4460 0.07545 2018 4 14 58222 0.0125 0.4478 0.07362 2018 4 15 58223 0.0139 0.4495 0.07167 2018 4 16 58224 0.0153 0.4512 0.06967 2018 4 17 58225 0.0167 0.4528 0.06767 2018 4 18 58226 0.0182 0.4545 0.06574 2018 4 19 58227 0.0197 0.4561 0.06393 2018 4 20 58228 0.0212 0.4577 0.06224 2018 4 21 58229 0.0227 0.4593 0.06061 2018 4 22 58230 0.0243 0.4609 0.05900 2018 4 23 58231 0.0259 0.4624 0.05733 2018 4 24 58232 0.0275 0.4639 0.05553 2018 4 25 58233 0.0292 0.4654 0.05358 2018 4 26 58234 0.0309 0.4669 0.05149 2018 4 27 58235 0.0326 0.4683 0.04931 2018 4 28 58236 0.0343 0.4697 0.04709 2018 4 29 58237 0.0361 0.4711 0.04494 2018 4 30 58238 0.0379 0.4725 0.04291 2018 5 1 58239 0.0397 0.4738 0.04105 2018 5 2 58240 0.0415 0.4751 0.03939 2018 5 3 58241 0.0433 0.4764 0.03793 2018 5 4 58242 0.0452 0.4776 0.03662 2018 5 5 58243 0.0471 0.4789 0.03543 2018 5 6 58244 0.0490 0.4801 0.03431 2018 5 7 58245 0.0510 0.4813 0.03319 2018 5 8 58246 0.0529 0.4824 0.03202 2018 5 9 58247 0.0549 0.4835 0.03076 2018 5 10 58248 0.0569 0.4846 0.02939 2018 5 11 58249 0.0589 0.4857 0.02790 2018 5 12 58250 0.0610 0.4867 0.02632 2018 5 13 58251 0.0630 0.4877 0.02470 2018 5 14 58252 0.0651 0.4887 0.02311 2018 5 15 58253 0.0672 0.4896 0.02163 2018 5 16 58254 0.0693 0.4905 0.02032 2018 5 17 58255 0.0714 0.4914 0.01922 2018 5 18 58256 0.0735 0.4922 0.01830 2018 5 19 58257 0.0757 0.4930 0.01748 2018 5 20 58258 0.0779 0.4938 0.01668 2018 5 21 58259 0.0800 0.4946 0.01584 2018 5 22 58260 0.0822 0.4953 0.01492 2018 5 23 58261 0.0844 0.4960 0.01391 2018 5 24 58262 0.0866 0.4966 0.01282 2018 5 25 58263 0.0888 0.4973 0.01172 2018 5 26 58264 0.0911 0.4978 0.01066 2018 5 27 58265 0.0933 0.4984 0.00971 2018 5 28 58266 0.0956 0.4989 0.00890 2018 5 29 58267 0.0978 0.4994 0.00827 2018 5 30 58268 0.1001 0.4999 0.00776 2018 5 31 58269 0.1024 0.5003 0.00737 2018 6 1 58270 0.1047 0.5007 0.00708 2018 6 2 58271 0.1069 0.5010 0.00679 2018 6 3 58272 0.1092 0.5014 0.00653 2018 6 4 58273 0.1115 0.5017 0.00625 2018 6 5 58274 0.1138 0.5019 0.00592 2018 6 6 58275 0.1161 0.5021 0.00552 2018 6 7 58276 0.1185 0.5023 0.00502 2018 6 8 58277 0.1208 0.5025 0.00440 2018 6 9 58278 0.1231 0.5026 0.00369 2018 6 10 58279 0.1254 0.5027 0.00288 2018 6 11 58280 0.1277 0.5027 0.00203 2018 6 12 58281 0.1300 0.5028 0.00126 2018 6 13 58282 0.1323 0.5027 0.00068 2018 6 14 58283 0.1347 0.5027 0.00027 2018 6 15 58284 0.1370 0.5026 -0.00003 2018 6 16 58285 0.1393 0.5025 -0.00034 2018 6 17 58286 0.1416 0.5023 -0.00070 2018 6 18 58287 0.1439 0.5022 -0.00113 2018 6 19 58288 0.1462 0.5019 -0.00161 2018 6 20 58289 0.1485 0.5017 -0.00216 2018 6 21 58290 0.1508 0.5014 -0.00270 2018 6 22 58291 0.1530 0.5011 -0.00314 2018 6 23 58292 0.1553 0.5007 -0.00345 2018 6 24 58293 0.1576 0.5003 -0.00366 2018 6 25 58294 0.1598 0.4999 -0.00372 2018 6 26 58295 0.1621 0.4995 -0.00360 2018 6 27 58296 0.1643 0.4990 -0.00334 2018 6 28 58297 0.1666 0.4985 -0.00303 2018 6 29 58298 0.1688 0.4979 -0.00271 2018 6 30 58299 0.1710 0.4973 -0.00245 2018 7 1 58300 0.1732 0.4967 -0.00221 2018 7 2 58301 0.1754 0.4961 -0.00206 2018 7 3 58302 0.1776 0.4954 -0.00204 2018 7 4 58303 0.1797 0.4947 -0.00218 2018 7 5 58304 0.1819 0.4939 -0.00250 2018 7 6 58305 0.1840 0.4931 -0.00303 2018 7 7 58306 0.1861 0.4923 -0.00367 2018 7 8 58307 0.1882 0.4915 -0.00435 2018 7 9 58308 0.1903 0.4906 -0.00499 2018 7 10 58309 0.1924 0.4897 -0.00554 2018 7 11 58310 0.1944 0.4888 -0.00595 2018 7 12 58311 0.1964 0.4878 -0.00624 2018 7 13 58312 0.1985 0.4868 -0.00645 2018 7 14 58313 0.2005 0.4858 -0.00669 2018 7 15 58314 0.2024 0.4848 -0.00700 2018 7 16 58315 0.2044 0.4837 -0.00744 2018 7 17 58316 0.2063 0.4826 -0.00798 2018 7 18 58317 0.2082 0.4814 -0.00853 2018 7 19 58318 0.2101 0.4803 -0.00902 2018 7 20 58319 0.2120 0.4791 -0.00940 2018 7 21 58320 0.2139 0.4779 -0.00964 2018 7 22 58321 0.2157 0.4766 -0.00972 2018 7 23 58322 0.2175 0.4754 -0.00965 2018 7 24 58323 0.2193 0.4741 -0.00946 2018 7 25 58324 0.2210 0.4727 -0.00921 2018 7 26 58325 0.2228 0.4714 -0.00890 2018 7 27 58326 0.2245 0.4700 -0.00862 2018 7 28 58327 0.2261 0.4686 -0.00837 2018 7 29 58328 0.2278 0.4672 -0.00824 2018 7 30 58329 0.2294 0.4657 -0.00824 2018 7 31 58330 0.2310 0.4643 -0.00837 2018 8 1 58331 0.2326 0.4628 -0.00866 2018 8 2 58332 0.2341 0.4613 -0.00904 2018 8 3 58333 0.2356 0.4597 -0.00946 2018 8 4 58334 0.2371 0.4582 -0.00988 2018 8 5 58335 0.2386 0.4566 -0.01032 2018 8 6 58336 0.2400 0.4550 -0.01072 2018 8 7 58337 0.2414 0.4533 -0.01110 2018 8 8 58338 0.2428 0.4517 -0.01146 2018 8 9 58339 0.2441 0.4500 -0.01178 2018 8 10 58340 0.2454 0.4484 -0.01214 2018 8 11 58341 0.2467 0.4467 -0.01262 2018 8 12 58342 0.2480 0.4449 -0.01326 2018 8 13 58343 0.2492 0.4432 -0.01406 2018 8 14 58344 0.2504 0.4414 -0.01501 2018 8 15 58345 0.2515 0.4397 -0.01599 2018 8 16 58346 0.2526 0.4379 -0.01690 2018 8 17 58347 0.2537 0.4361 -0.01768 2018 8 18 58348 0.2548 0.4342 -0.01832 2018 8 19 58349 0.2558 0.4324 -0.01883 2018 8 20 58350 0.2568 0.4306 -0.01915 2018 8 21 58351 0.2577 0.4287 -0.01936 2018 8 22 58352 0.2586 0.4268 -0.01953 2018 8 23 58353 0.2595 0.4249 -0.01967 2018 8 24 58354 0.2604 0.4230 -0.01983 2018 8 25 58355 0.2612 0.4211 -0.02010 2018 8 26 58356 0.2619 0.4192 -0.02046 2018 8 27 58357 0.2627 0.4172 -0.02095 2018 8 28 58358 0.2634 0.4153 -0.02159 2018 8 29 58359 0.2641 0.4133 -0.02233 2018 8 30 58360 0.2647 0.4114 -0.02316 2018 8 31 58361 0.2653 0.4094 -0.02404 2018 9 1 58362 0.2659 0.4074 -0.02491 2018 9 2 58363 0.2664 0.4054 -0.02571 2018 9 3 58364 0.2669 0.4034 -0.02642 2018 9 4 58365 0.2673 0.4014 -0.02707 2018 9 5 58366 0.2677 0.3994 -0.02768 2018 9 6 58367 0.2681 0.3974 -0.02836 2018 9 7 58368 0.2685 0.3954 -0.02918 2018 9 8 58369 0.2688 0.3933 -0.03015 2018 9 9 58370 0.2690 0.3913 -0.03126 2018 9 10 58371 0.2693 0.3893 -0.03253 2018 9 11 58372 0.2695 0.3872 -0.03395 2018 9 12 58373 0.2696 0.3852 -0.03538 2018 9 13 58374 0.2698 0.3832 -0.03676 2018 9 14 58375 0.2698 0.3811 -0.03800 2018 9 15 58376 0.2699 0.3791 -0.03906 2018 9 16 58377 0.2699 0.3770 -0.03996 2018 9 17 58378 0.2699 0.3750 -0.04077 2018 9 18 58379 0.2698 0.3730 -0.04155 2018 9 19 58380 0.2697 0.3709 -0.04235 2018 9 20 58381 0.2696 0.3689 -0.04318 2018 9 21 58382 0.2694 0.3668 -0.04413 2018 9 22 58383 0.2692 0.3648 -0.04521 2018 9 23 58384 0.2690 0.3628 -0.04640 2018 9 24 58385 0.2687 0.3608 -0.04770 2018 9 25 58386 0.2684 0.3588 -0.04911 2018 9 26 58387 0.2680 0.3567 -0.05060 2018 9 27 58388 0.2676 0.3547 -0.05214 2018 9 28 58389 0.2672 0.3527 -0.05368 2018 9 29 58390 0.2667 0.3508 -0.05513 2018 9 30 58391 0.2662 0.3488 -0.05645 2018 10 1 58392 0.2657 0.3468 -0.05763 2018 10 2 58393 0.2651 0.3448 -0.05872 2018 10 3 58394 0.2645 0.3429 -0.05975 2018 10 4 58395 0.2639 0.3409 -0.06081 2018 10 5 58396 0.2632 0.3390 -0.06196 2018 10 6 58397 0.2625 0.3371 -0.06328 2018 10 7 58398 0.2618 0.3352 -0.06479 2018 10 8 58399 0.2610 0.3333 -0.06650 2018 10 9 58400 0.2602 0.3314 -0.06835 2018 10 10 58401 0.2594 0.3295 -0.07020 2018 10 11 58402 0.2585 0.3276 -0.07197 2018 10 12 58403 0.2576 0.3258 -0.07362 2018 10 13 58404 0.2566 0.3239 -0.07509 2018 10 14 58405 0.2557 0.3221 -0.07643 2018 10 15 58406 0.2546 0.3203 -0.07766 2018 10 16 58407 0.2536 0.3185 -0.07887 2018 10 17 58408 0.2525 0.3168 -0.08007 2018 10 18 58409 0.2514 0.3150 -0.08126 2018 10 19 58410 0.2503 0.3133 -0.08249 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) 58023 -109.76 0.19 -11.87 0.12 58024 -109.46 0.19 -11.81 0.12 58025 -109.48 0.19 -11.76 0.12 58026 -109.66 0.12 -11.81 0.07 58027 -109.75 0.30 -11.93 0.04 58028 -109.67 0.30 -12.02 0.04 58029 -109.52 0.30 -11.94 0.02 58030 -109.39 0.30 -11.65 0.02 58031 -109.29 0.30 -11.26 0.02 58032 -109.25 0.30 -11.03 0.02 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58023 0.203 0.076 0.139 0.120 58024 0.222 0.076 0.159 0.120 58025 0.228 0.076 0.147 0.120 58026 0.230 0.048 0.110 0.070 58027 0.246 0.119 0.097 0.040 58028 0.274 0.119 0.103 0.040 58029 0.294 0.119 0.114 0.020 58030 0.299 0.119 0.105 0.020 58031 0.297 0.119 0.088 0.020 58032 0.287 0.119 0.040 0.020 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).