********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 11 January 2018 Vol. XXXI No. 002 ______________________________________________________________________ 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 18 1 5 58123 0.05349 .00009 0.25161 .00009 0.213164 0.000015 18 1 6 58124 0.05244 .00009 0.25293 .00009 0.212274 0.000013 18 1 7 58125 0.05095 .00009 0.25413 .00009 0.211407 0.000013 18 1 8 58126 0.04934 .00009 0.25501 .00009 0.210577 0.000017 18 1 9 58127 0.04801 .00009 0.25590 .00009 0.209880 0.000019 18 1 10 58128 0.04666 .00009 0.25712 .00009 0.209335 0.000018 18 1 11 58129 0.04508 .00009 0.25851 .00009 0.208915 0.000018 _______________________________________________________________________ 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 = 0.1209 - 0.0496 cos A - 0.1282 sin A - 0.0285 cos C + 0.0180 sin C y = 0.3575 - 0.1181 cos A + 0.0408 sin A + 0.0180 cos C + 0.0285 sin C UT1-UTC = 0.2181 - 0.00099 (MJD - 58137) - (UT2-UT1) where A = 2*pi*(MJD-58129)/365.25 and C = 2*pi*(MJD-58129)/435. TAI-UTC(MJD 58130) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58129)**0.80 S t = 0.00025 (MJD-58129)**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) 2018 1 12 58130 0.0434 0.2598 0.20856 2018 1 13 58131 0.0418 0.2612 0.20831 2018 1 14 58132 0.0401 0.2625 0.20818 2018 1 15 58133 0.0384 0.2638 0.20816 2018 1 16 58134 0.0368 0.2650 0.20819 2018 1 17 58135 0.0352 0.2662 0.20823 2018 1 18 58136 0.0336 0.2675 0.20822 2018 1 19 58137 0.0320 0.2688 0.20811 2018 1 20 58138 0.0305 0.2701 0.20788 2018 1 21 58139 0.0289 0.2715 0.20752 2018 1 22 58140 0.0274 0.2728 0.20700 2018 1 23 58141 0.0260 0.2742 0.20636 2018 1 24 58142 0.0246 0.2756 0.20565 2018 1 25 58143 0.0232 0.2770 0.20491 2018 1 26 58144 0.0218 0.2784 0.20415 2018 1 27 58145 0.0204 0.2799 0.20341 2018 1 28 58146 0.0191 0.2813 0.20272 2018 1 29 58147 0.0178 0.2828 0.20205 2018 1 30 58148 0.0165 0.2844 0.20137 2018 1 31 58149 0.0153 0.2859 0.20061 2018 2 1 58150 0.0141 0.2874 0.19972 2018 2 2 58151 0.0129 0.2890 0.19868 2018 2 3 58152 0.0117 0.2906 0.19751 2018 2 4 58153 0.0106 0.2922 0.19628 2018 2 5 58154 0.0095 0.2938 0.19505 2018 2 6 58155 0.0084 0.2955 0.19388 2018 2 7 58156 0.0074 0.2971 0.19281 2018 2 8 58157 0.0064 0.2988 0.19183 2018 2 9 58158 0.0054 0.3005 0.19096 2018 2 10 58159 0.0045 0.3022 0.19018 2018 2 11 58160 0.0035 0.3039 0.18946 2018 2 12 58161 0.0027 0.3056 0.18878 2018 2 13 58162 0.0018 0.3074 0.18808 2018 2 14 58163 0.0010 0.3091 0.18734 2018 2 15 58164 0.0002 0.3109 0.18652 2018 2 16 58165 -0.0005 0.3127 0.18557 2018 2 17 58166 -0.0013 0.3145 0.18450 2018 2 18 58167 -0.0019 0.3163 0.18328 2018 2 19 58168 -0.0026 0.3181 0.18196 2018 2 20 58169 -0.0032 0.3199 0.18057 2018 2 21 58170 -0.0038 0.3218 0.17915 2018 2 22 58171 -0.0044 0.3236 0.17776 2018 2 23 58172 -0.0049 0.3255 0.17644 2018 2 24 58173 -0.0054 0.3273 0.17522 2018 2 25 58174 -0.0058 0.3292 0.17408 2018 2 26 58175 -0.0062 0.3311 0.17297 2018 2 27 58176 -0.0066 0.3330 0.17184 2018 2 28 58177 -0.0069 0.3349 0.17061 2018 3 1 58178 -0.0073 0.3368 0.16924 2018 3 2 58179 -0.0075 0.3387 0.16773 2018 3 3 58180 -0.0078 0.3406 0.16611 2018 3 4 58181 -0.0080 0.3425 0.16447 2018 3 5 58182 -0.0082 0.3444 0.16287 2018 3 6 58183 -0.0083 0.3464 0.16137 2018 3 7 58184 -0.0084 0.3483 0.16000 2018 3 8 58185 -0.0085 0.3502 0.15878 2018 3 9 58186 -0.0085 0.3522 0.15770 2018 3 10 58187 -0.0085 0.3541 0.15673 2018 3 11 58188 -0.0085 0.3560 0.15583 2018 3 12 58189 -0.0084 0.3580 0.15496 2018 3 13 58190 -0.0083 0.3599 0.15406 2018 3 14 58191 -0.0081 0.3618 0.15310 2018 3 15 58192 -0.0080 0.3638 0.15203 2018 3 16 58193 -0.0077 0.3657 0.15082 2018 3 17 58194 -0.0075 0.3676 0.14946 2018 3 18 58195 -0.0072 0.3695 0.14797 2018 3 19 58196 -0.0069 0.3715 0.14640 2018 3 20 58197 -0.0065 0.3734 0.14480 2018 3 21 58198 -0.0061 0.3753 0.14324 2018 3 22 58199 -0.0057 0.3772 0.14176 2018 3 23 58200 -0.0053 0.3791 0.14040 2018 3 24 58201 -0.0048 0.3810 0.13914 2018 3 25 58202 -0.0042 0.3829 0.13794 2018 3 26 58203 -0.0037 0.3848 0.13675 2018 3 27 58204 -0.0031 0.3866 0.13548 2018 3 28 58205 -0.0025 0.3885 0.13410 2018 3 29 58206 -0.0018 0.3904 0.13257 2018 3 30 58207 -0.0011 0.3922 0.13093 2018 3 31 58208 -0.0004 0.3940 0.12921 2018 4 1 58209 0.0004 0.3959 0.12751 2018 4 2 58210 0.0012 0.3977 0.12589 2018 4 3 58211 0.0020 0.3995 0.12439 2018 4 4 58212 0.0029 0.4013 0.12305 2018 4 5 58213 0.0037 0.4031 0.12186 2018 4 6 58214 0.0047 0.4048 0.12079 2018 4 7 58215 0.0056 0.4066 0.11982 2018 4 8 58216 0.0066 0.4083 0.11890 2018 4 9 58217 0.0076 0.4101 0.11796 2018 4 10 58218 0.0087 0.4118 0.11697 2018 4 11 58219 0.0098 0.4135 0.11589 2018 4 12 58220 0.0109 0.4152 0.11467 2018 4 13 58221 0.0120 0.4168 0.11330 2018 4 14 58222 0.0132 0.4185 0.11179 2018 4 15 58223 0.0144 0.4201 0.11016 2018 4 16 58224 0.0156 0.4217 0.10848 2018 4 17 58225 0.0168 0.4233 0.10681 2018 4 18 58226 0.0181 0.4249 0.10522 2018 4 19 58227 0.0194 0.4265 0.10377 2018 4 20 58228 0.0208 0.4280 0.10244 2018 4 21 58229 0.0221 0.4296 0.10121 2018 4 22 58230 0.0235 0.4311 0.10003 2018 4 23 58231 0.0250 0.4325 0.09881 2018 4 24 58232 0.0264 0.4340 0.09750 2018 4 25 58233 0.0279 0.4354 0.09608 2018 4 26 58234 0.0294 0.4369 0.09454 2018 4 27 58235 0.0309 0.4383 0.09292 2018 4 28 58236 0.0324 0.4396 0.09129 2018 4 29 58237 0.0340 0.4410 0.08971 2018 4 30 58238 0.0356 0.4423 0.08833 2018 5 1 58239 0.0372 0.4436 0.08710 2018 5 2 58240 0.0389 0.4449 0.08602 2018 5 3 58241 0.0405 0.4462 0.08509 2018 5 4 58242 0.0422 0.4474 0.08428 2018 5 5 58243 0.0439 0.4486 0.08354 2018 5 6 58244 0.0456 0.4498 0.08283 2018 5 7 58245 0.0474 0.4509 0.08210 2018 5 8 58246 0.0491 0.4521 0.08131 2018 5 9 58247 0.0509 0.4532 0.08041 2018 5 10 58248 0.0527 0.4543 0.07939 2018 5 11 58249 0.0546 0.4553 0.07824 2018 5 12 58250 0.0564 0.4563 0.07698 2018 5 13 58251 0.0583 0.4573 0.07564 2018 5 14 58252 0.0601 0.4583 0.07429 2018 5 15 58253 0.0620 0.4593 0.07299 2018 5 16 58254 0.0639 0.4602 0.07182 2018 5 17 58255 0.0659 0.4611 0.07081 2018 5 18 58256 0.0678 0.4619 0.06992 2018 5 19 58257 0.0697 0.4627 0.06911 2018 5 20 58258 0.0717 0.4635 0.06831 2018 5 21 58259 0.0737 0.4643 0.06744 2018 5 22 58260 0.0757 0.4651 0.06649 2018 5 23 58261 0.0777 0.4658 0.06544 2018 5 24 58262 0.0797 0.4665 0.06433 2018 5 25 58263 0.0817 0.4671 0.06322 2018 5 26 58264 0.0838 0.4677 0.06215 2018 5 27 58265 0.0858 0.4683 0.06118 2018 5 28 58266 0.0879 0.4689 0.06035 2018 5 29 58267 0.0899 0.4694 0.05967 2018 5 30 58268 0.0920 0.4699 0.05915 2018 5 31 58269 0.0941 0.4704 0.05876 2018 6 1 58270 0.0962 0.4708 0.05847 2018 6 2 58271 0.0983 0.4712 0.05822 2018 6 3 58272 0.1003 0.4716 0.05798 2018 6 4 58273 0.1025 0.4719 0.05769 2018 6 5 58274 0.1046 0.4723 0.05732 2018 6 6 58275 0.1067 0.4725 0.05684 2018 6 7 58276 0.1088 0.4728 0.05625 2018 6 8 58277 0.1109 0.4730 0.05555 2018 6 9 58278 0.1130 0.4732 0.05475 2018 6 10 58279 0.1152 0.4733 0.05391 2018 6 11 58280 0.1173 0.4735 0.05309 2018 6 12 58281 0.1194 0.4735 0.05235 2018 6 13 58282 0.1215 0.4736 0.05174 2018 6 14 58283 0.1237 0.4736 0.05126 2018 6 15 58284 0.1258 0.4736 0.05089 2018 6 16 58285 0.1279 0.4736 0.05053 2018 6 17 58286 0.1300 0.4735 0.05013 2018 6 18 58287 0.1321 0.4734 0.04963 2018 6 19 58288 0.1342 0.4733 0.04903 2018 6 20 58289 0.1363 0.4731 0.04836 2018 6 21 58290 0.1385 0.4729 0.04767 2018 6 22 58291 0.1405 0.4727 0.04704 2018 6 23 58292 0.1426 0.4724 0.04650 2018 6 24 58293 0.1447 0.4722 0.04610 2018 6 25 58294 0.1468 0.4718 0.04585 2018 6 26 58295 0.1489 0.4715 0.04575 2018 6 27 58296 0.1509 0.4711 0.04577 2018 6 28 58297 0.1530 0.4707 0.04590 2018 6 29 58298 0.1550 0.4702 0.04609 2018 6 30 58299 0.1571 0.4698 0.04629 2018 7 1 58300 0.1591 0.4692 0.04646 2018 7 2 58301 0.1611 0.4687 0.04655 2018 7 3 58302 0.1631 0.4681 0.04655 2018 7 4 58303 0.1651 0.4675 0.04644 2018 7 5 58304 0.1671 0.4669 0.04622 2018 7 6 58305 0.1690 0.4663 0.04592 2018 7 7 58306 0.1710 0.4656 0.04557 2018 7 8 58307 0.1729 0.4649 0.04521 2018 7 9 58308 0.1749 0.4641 0.04490 2018 7 10 58309 0.1768 0.4633 0.04471 2018 7 11 58310 0.1787 0.4625 0.04465 2018 7 12 58311 0.1805 0.4617 0.04471 2018 7 13 58312 0.1824 0.4608 0.04485 2018 7 14 58313 0.1842 0.4600 0.04497 2018 7 15 58314 0.1860 0.4590 0.04502 2018 7 16 58315 0.1879 0.4581 0.04499 2018 7 17 58316 0.1896 0.4571 0.04487 2018 7 18 58317 0.1914 0.4561 0.04475 2018 7 19 58318 0.1931 0.4551 0.04466 2018 7 20 58319 0.1949 0.4540 0.04465 2018 7 21 58320 0.1966 0.4530 0.04473 2018 7 22 58321 0.1983 0.4519 0.04489 2018 7 23 58322 0.1999 0.4507 0.04512 2018 7 24 58323 0.2016 0.4496 0.04538 2018 7 25 58324 0.2032 0.4484 0.04564 2018 7 26 58325 0.2048 0.4472 0.04587 2018 7 27 58326 0.2063 0.4460 0.04604 2018 7 28 58327 0.2079 0.4447 0.04613 2018 7 29 58328 0.2094 0.4435 0.04609 2018 7 30 58329 0.2109 0.4422 0.04593 2018 7 31 58330 0.2124 0.4408 0.04564 2018 8 1 58331 0.2138 0.4395 0.04522 2018 8 2 58332 0.2153 0.4381 0.04468 2018 8 3 58333 0.2167 0.4368 0.04407 2018 8 4 58334 0.2180 0.4354 0.04342 2018 8 5 58335 0.2194 0.4339 0.04278 2018 8 6 58336 0.2207 0.4325 0.04219 2018 8 7 58337 0.2220 0.4310 0.04170 2018 8 8 58338 0.2232 0.4295 0.04132 2018 8 9 58339 0.2245 0.4280 0.04098 2018 8 10 58340 0.2257 0.4265 0.04063 2018 8 11 58341 0.2268 0.4250 0.04018 2018 8 12 58342 0.2280 0.4234 0.03957 2018 8 13 58343 0.2291 0.4218 0.03880 2018 8 14 58344 0.2302 0.4202 0.03793 2018 8 15 58345 0.2312 0.4186 0.03703 2018 8 16 58346 0.2323 0.4170 0.03621 2018 8 17 58347 0.2332 0.4154 0.03553 2018 8 18 58348 0.2342 0.4137 0.03502 2018 8 19 58349 0.2351 0.4120 0.03464 2018 8 20 58350 0.2360 0.4103 0.03441 2018 8 21 58351 0.2369 0.4087 0.03432 2018 8 22 58352 0.2377 0.4069 0.03426 2018 8 23 58353 0.2385 0.4052 0.03417 2018 8 24 58354 0.2393 0.4035 0.03402 2018 8 25 58355 0.2401 0.4017 0.03372 2018 8 26 58356 0.2408 0.4000 0.03329 2018 8 27 58357 0.2414 0.3982 0.03272 2018 8 28 58358 0.2421 0.3964 0.03198 2018 8 29 58359 0.2427 0.3946 0.03106 2018 8 30 58360 0.2433 0.3928 0.03006 2018 8 31 58361 0.2438 0.3910 0.02901 2018 9 1 58362 0.2443 0.3892 0.02792 2018 9 2 58363 0.2448 0.3874 0.02684 2018 9 3 58364 0.2452 0.3856 0.02577 2018 9 4 58365 0.2456 0.3837 0.02475 2018 9 5 58366 0.2460 0.3819 0.02378 2018 9 6 58367 0.2463 0.3800 0.02276 2018 9 7 58368 0.2466 0.3782 0.02161 2018 9 8 58369 0.2469 0.3763 0.02029 2018 9 9 58370 0.2471 0.3745 0.01882 2018 9 10 58371 0.2473 0.3726 0.01722 2018 9 11 58372 0.2475 0.3707 0.01558 2018 9 12 58373 0.2476 0.3689 0.01403 2018 9 13 58374 0.2477 0.3670 0.01258 2018 9 14 58375 0.2478 0.3651 0.01120 2018 9 15 58376 0.2478 0.3633 0.00997 2018 9 16 58377 0.2478 0.3614 0.00889 2018 9 17 58378 0.2478 0.3595 0.00797 2018 9 18 58379 0.2477 0.3576 0.00717 2018 9 19 58380 0.2476 0.3558 0.00644 2018 9 20 58381 0.2474 0.3539 0.00569 2018 9 21 58382 0.2473 0.3520 0.00485 2018 9 22 58383 0.2470 0.3502 0.00386 2018 9 23 58384 0.2468 0.3483 0.00267 2018 9 24 58385 0.2465 0.3465 0.00131 2018 9 25 58386 0.2462 0.3446 -0.00009 2018 9 26 58387 0.2459 0.3428 -0.00160 2018 9 27 58388 0.2455 0.3409 -0.00318 2018 9 28 58389 0.2451 0.3391 -0.00473 2018 9 29 58390 0.2446 0.3372 -0.00620 2018 9 30 58391 0.2441 0.3354 -0.00755 2018 10 1 58392 0.2436 0.3336 -0.00875 2018 10 2 58393 0.2431 0.3318 -0.00984 2018 10 3 58394 0.2425 0.3300 -0.01103 2018 10 4 58395 0.2419 0.3282 -0.01229 2018 10 5 58396 0.2412 0.3264 -0.01364 2018 10 6 58397 0.2406 0.3247 -0.01508 2018 10 7 58398 0.2399 0.3229 -0.01668 2018 10 8 58399 0.2391 0.3211 -0.01845 2018 10 9 58400 0.2384 0.3194 -0.02028 2018 10 10 58401 0.2376 0.3177 -0.02205 2018 10 11 58402 0.2367 0.3160 -0.02369 2018 10 12 58403 0.2359 0.3143 -0.02519 2018 10 13 58404 0.2350 0.3126 -0.02657 2018 10 14 58405 0.2341 0.3109 -0.02790 2018 10 15 58406 0.2331 0.3092 -0.02912 2018 10 16 58407 0.2321 0.3076 -0.03029 2018 10 17 58408 0.2311 0.3060 -0.03145 2018 10 18 58409 0.2301 0.3044 -0.03264 2018 10 19 58410 0.2290 0.3028 -0.03391 2018 10 20 58411 0.2279 0.3012 -0.03526 2018 10 21 58412 0.2268 0.2996 -0.03683 2018 10 22 58413 0.2256 0.2981 -0.03857 2018 10 23 58414 0.2245 0.2965 -0.04043 2018 10 24 58415 0.2233 0.2950 -0.04229 2018 10 25 58416 0.2220 0.2935 -0.04409 2018 10 26 58417 0.2208 0.2921 -0.04580 2018 10 27 58418 0.2195 0.2906 -0.04738 2018 10 28 58419 0.2182 0.2892 -0.04874 2018 10 29 58420 0.2169 0.2878 -0.04989 2018 10 30 58421 0.2155 0.2864 -0.05094 2018 10 31 58422 0.2141 0.2850 -0.05205 2018 11 1 58423 0.2127 0.2836 -0.05328 2018 11 2 58424 0.2113 0.2823 -0.05462 2018 11 3 58425 0.2098 0.2810 -0.05611 2018 11 4 58426 0.2084 0.2797 -0.05766 2018 11 5 58427 0.2069 0.2785 -0.05930 2018 11 6 58428 0.2054 0.2772 -0.06092 2018 11 7 58429 0.2038 0.2760 -0.06248 2018 11 8 58430 0.2023 0.2748 -0.06392 2018 11 9 58431 0.2007 0.2736 -0.06517 2018 11 10 58432 0.1991 0.2725 -0.06625 2018 11 11 58433 0.1975 0.2714 -0.06721 2018 11 12 58434 0.1959 0.2703 -0.06807 2018 11 13 58435 0.1942 0.2692 -0.06886 2018 11 14 58436 0.1925 0.2682 -0.06971 2018 11 15 58437 0.1908 0.2671 -0.07063 2018 11 16 58438 0.1891 0.2662 -0.07165 2018 11 17 58439 0.1874 0.2652 -0.07285 2018 11 18 58440 0.1857 0.2642 -0.07414 2018 11 19 58441 0.1839 0.2633 -0.07551 2018 11 20 58442 0.1822 0.2624 -0.07694 2018 11 21 58443 0.1804 0.2616 -0.07836 2018 11 22 58444 0.1786 0.2608 -0.07975 2018 11 23 58445 0.1768 0.2600 -0.08104 2018 11 24 58446 0.1750 0.2592 -0.08222 2018 11 25 58447 0.1732 0.2584 -0.08332 2018 11 26 58448 0.1713 0.2577 -0.08440 2018 11 27 58449 0.1695 0.2570 -0.08547 2018 11 28 58450 0.1676 0.2564 -0.08653 2018 11 29 58451 0.1657 0.2557 -0.08768 2018 11 30 58452 0.1639 0.2551 -0.08895 2018 12 1 58453 0.1620 0.2545 -0.09037 2018 12 2 58454 0.1601 0.2540 -0.09186 2018 12 3 58455 0.1582 0.2535 -0.09333 2018 12 4 58456 0.1563 0.2530 -0.09467 2018 12 5 58457 0.1543 0.2525 -0.09589 2018 12 6 58458 0.1524 0.2521 -0.09691 2018 12 7 58459 0.1505 0.2517 -0.09772 2018 12 8 58460 0.1486 0.2513 -0.09835 2018 12 9 58461 0.1466 0.2510 -0.09890 2018 12 10 58462 0.1447 0.2507 -0.09940 2018 12 11 58463 0.1427 0.2504 -0.09986 2018 12 12 58464 0.1408 0.2502 -0.10036 2018 12 13 58465 0.1388 0.2499 -0.10098 2018 12 14 58466 0.1369 0.2497 -0.10175 2018 12 15 58467 0.1349 0.2496 -0.10272 2018 12 16 58468 0.1330 0.2495 -0.10377 2018 12 17 58469 0.1310 0.2494 -0.10493 2018 12 18 58470 0.1291 0.2493 -0.10618 2018 12 19 58471 0.1271 0.2493 -0.10747 2018 12 20 58472 0.1252 0.2492 -0.10877 2018 12 21 58473 0.1232 0.2493 -0.11009 2018 12 22 58474 0.1213 0.2493 -0.11133 2018 12 23 58475 0.1194 0.2494 -0.11251 2018 12 24 58476 0.1174 0.2495 -0.11364 2018 12 25 58477 0.1155 0.2497 -0.11481 2018 12 26 58478 0.1136 0.2498 -0.11608 2018 12 27 58479 0.1117 0.2500 -0.11747 2018 12 28 58480 0.1097 0.2503 -0.11894 2018 12 29 58481 0.1078 0.2505 -0.12046 2018 12 30 58482 0.1059 0.2508 -0.12195 2018 12 31 58483 0.1041 0.2511 -0.12335 2019 1 1 58484 0.1022 0.2515 -0.12461 2019 1 2 58485 0.1003 0.2518 -0.12568 2019 1 3 58486 0.0985 0.2523 -0.12656 2019 1 4 58487 0.0966 0.2527 -0.12727 2019 1 5 58488 0.0948 0.2532 -0.12785 2019 1 6 58489 0.0929 0.2536 -0.12837 2019 1 7 58490 0.0911 0.2542 -0.12886 2019 1 8 58491 0.0893 0.2547 -0.12940 2019 1 9 58492 0.0875 0.2553 -0.13004 2019 1 10 58493 0.0858 0.2559 -0.13078 2019 1 11 58494 0.0840 0.2565 -0.13167 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) 58107 -103.37 0.30 -8.77 0.05 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58107 0.264 0.119 -0.250 0.050 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).