********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 May 2016 Vol. XXIX No. 021 ______________________________________________________________________ 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 19 May 2016 at 0000 UTC Beginning 1 July 2015: TAI-UTC = 36.000 000 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 by available by 20:00 UTC. * * * * 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 16 5 20 57528 0.06942 .00009 0.49214 .00009 -0.167882 0.000014 16 5 21 57529 0.07044 .00009 0.49302 .00009 -0.169393 0.000016 16 5 22 57530 0.07131 .00009 0.49359 .00009 -0.170862 0.000015 16 5 23 57531 0.07252 .00009 0.49385 .00009 -0.172357 0.000010 16 5 24 57532 0.07432 .00009 0.49422 .00009 -0.173809 0.000010 16 5 25 57533 0.07646 .00009 0.49482 .00009 -0.175261 0.000010 16 5 26 57534 0.07879 .00009 0.49547 .00009 -0.176662 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 = 0.1016 - 0.0603 cos A + 0.1274 sin A + 0.0408 cos C + 0.0128 sin C y = 0.3634 + 0.1179 cos A + 0.0579 sin A + 0.0128 cos C - 0.0408 sin C UT1-UTC = -0.1546 - 0.00146 (MJD - 57542) - (UT2-UT1) where A = 2*pi*(MJD-57534)/365.25 and C = 2*pi*(MJD-57534)/435. TAI-UTC(MJD 57535) = 36.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57534)**0.80 S t = 0.00025 (MJD-57534)**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) 2016 5 27 57535 0.0811 0.4961 -0.17804 2016 5 28 57536 0.0834 0.4967 -0.17949 2016 5 29 57537 0.0856 0.4972 -0.18104 2016 5 30 57538 0.0877 0.4975 -0.18270 2016 5 31 57539 0.0899 0.4978 -0.18444 2016 6 1 57540 0.0921 0.4980 -0.18618 2016 6 2 57541 0.0943 0.4982 -0.18787 2016 6 3 57542 0.0967 0.4984 -0.18945 2016 6 4 57543 0.0990 0.4986 -0.19088 2016 6 5 57544 0.1013 0.4987 -0.19219 2016 6 6 57545 0.1037 0.4989 -0.19341 2016 6 7 57546 0.1060 0.4990 -0.19458 2016 6 8 57547 0.1083 0.4991 -0.19579 2016 6 9 57548 0.1105 0.4991 -0.19705 2016 6 10 57549 0.1127 0.4990 -0.19834 2016 6 11 57550 0.1150 0.4989 -0.19963 2016 6 12 57551 0.1173 0.4988 -0.20093 2016 6 13 57552 0.1196 0.4986 -0.20220 2016 6 14 57553 0.1219 0.4984 -0.20340 2016 6 15 57554 0.1242 0.4982 -0.20450 2016 6 16 57555 0.1265 0.4980 -0.20550 2016 6 17 57556 0.1288 0.4977 -0.20638 2016 6 18 57557 0.1310 0.4974 -0.20715 2016 6 19 57558 0.1333 0.4970 -0.20781 2016 6 20 57559 0.1356 0.4966 -0.20838 2016 6 21 57560 0.1378 0.4962 -0.20890 2016 6 22 57561 0.1401 0.4957 -0.20941 2016 6 23 57562 0.1423 0.4952 -0.20996 2016 6 24 57563 0.1446 0.4946 -0.21059 2016 6 25 57564 0.1468 0.4941 -0.21134 2016 6 26 57565 0.1490 0.4935 -0.21222 2016 6 27 57566 0.1512 0.4929 -0.21319 2016 6 28 57567 0.1534 0.4922 -0.21421 2016 6 29 57568 0.1556 0.4915 -0.21522 2016 6 30 57569 0.1578 0.4907 -0.21618 2016 7 1 57570 0.1599 0.4900 -0.21701 2016 7 2 57571 0.1621 0.4892 -0.21770 2016 7 3 57572 0.1642 0.4883 -0.21825 2016 7 4 57573 0.1663 0.4875 -0.21871 2016 7 5 57574 0.1684 0.4866 -0.21913 2016 7 6 57575 0.1705 0.4856 -0.21958 2016 7 7 57576 0.1725 0.4847 -0.22008 2016 7 8 57577 0.1746 0.4837 -0.22064 2016 7 9 57578 0.1766 0.4826 -0.22123 2016 7 10 57579 0.1786 0.4816 -0.22185 2016 7 11 57580 0.1806 0.4805 -0.22246 2016 7 12 57581 0.1826 0.4794 -0.22305 2016 7 13 57582 0.1845 0.4782 -0.22358 2016 7 14 57583 0.1864 0.4770 -0.22404 2016 7 15 57584 0.1883 0.4758 -0.22443 2016 7 16 57585 0.1902 0.4746 -0.22475 2016 7 17 57586 0.1921 0.4733 -0.22501 2016 7 18 57587 0.1939 0.4720 -0.22526 2016 7 19 57588 0.1957 0.4707 -0.22553 2016 7 20 57589 0.1975 0.4694 -0.22587 2016 7 21 57590 0.1993 0.4680 -0.22632 2016 7 22 57591 0.2010 0.4666 -0.22692 2016 7 23 57592 0.2027 0.4651 -0.22768 2016 7 24 57593 0.2044 0.4637 -0.22856 2016 7 25 57594 0.2060 0.4622 -0.22953 2016 7 26 57595 0.2077 0.4607 -0.23050 2016 7 27 57596 0.2093 0.4592 -0.23141 2016 7 28 57597 0.2108 0.4576 -0.23223 2016 7 29 57598 0.2124 0.4560 -0.23291 2016 7 30 57599 0.2139 0.4544 -0.23348 2016 7 31 57600 0.2154 0.4528 -0.23397 2016 8 1 57601 0.2169 0.4511 -0.23443 2016 8 2 57602 0.2183 0.4494 -0.23490 2016 8 3 57603 0.2197 0.4477 -0.23543 2016 8 4 57604 0.2211 0.4460 -0.23603 2016 8 5 57605 0.2224 0.4443 -0.23668 2016 8 6 57606 0.2237 0.4425 -0.23738 2016 8 7 57607 0.2250 0.4407 -0.23811 2016 8 8 57608 0.2262 0.4389 -0.23882 2016 8 9 57609 0.2274 0.4371 -0.23951 2016 8 10 57610 0.2286 0.4353 -0.24015 2016 8 11 57611 0.2297 0.4334 -0.24073 2016 8 12 57612 0.2308 0.4315 -0.24125 2016 8 13 57613 0.2319 0.4296 -0.24174 2016 8 14 57614 0.2330 0.4277 -0.24222 2016 8 15 57615 0.2340 0.4258 -0.24274 2016 8 16 57616 0.2349 0.4239 -0.24333 2016 8 17 57617 0.2359 0.4219 -0.24405 2016 8 18 57618 0.2368 0.4199 -0.24495 2016 8 19 57619 0.2376 0.4179 -0.24604 2016 8 20 57620 0.2385 0.4159 -0.24731 2016 8 21 57621 0.2393 0.4139 -0.24870 2016 8 22 57622 0.2400 0.4119 -0.25015 2016 8 23 57623 0.2407 0.4099 -0.25156 2016 8 24 57624 0.2414 0.4078 -0.25287 2016 8 25 57625 0.2421 0.4058 -0.25406 2016 8 26 57626 0.2427 0.4037 -0.25512 2016 8 27 57627 0.2433 0.4016 -0.25609 2016 8 28 57628 0.2438 0.3995 -0.25702 2016 8 29 57629 0.2443 0.3974 -0.25796 2016 8 30 57630 0.2448 0.3953 -0.25896 2016 8 31 57631 0.2452 0.3932 -0.26004 2016 9 1 57632 0.2456 0.3911 -0.26121 2016 9 2 57633 0.2459 0.3890 -0.26244 2016 9 3 57634 0.2462 0.3868 -0.26370 2016 9 4 57635 0.2465 0.3847 -0.26498 2016 9 5 57636 0.2468 0.3826 -0.26623 2016 9 6 57637 0.2469 0.3804 -0.26743 2016 9 7 57638 0.2471 0.3783 -0.26856 2016 9 8 57639 0.2472 0.3761 -0.26962 2016 9 9 57640 0.2473 0.3740 -0.27062 2016 9 10 57641 0.2474 0.3718 -0.27158 2016 9 11 57642 0.2474 0.3697 -0.27255 2016 9 12 57643 0.2473 0.3675 -0.27357 2016 9 13 57644 0.2473 0.3654 -0.27469 2016 9 14 57645 0.2471 0.3632 -0.27596 2016 9 15 57646 0.2470 0.3610 -0.27743 2016 9 16 57647 0.2468 0.3589 -0.27908 2016 9 17 57648 0.2466 0.3568 -0.28091 2016 9 18 57649 0.2463 0.3546 -0.28284 2016 9 19 57650 0.2460 0.3525 -0.28477 2016 9 20 57651 0.2457 0.3503 -0.28662 2016 9 21 57652 0.2453 0.3482 -0.28833 2016 9 22 57653 0.2449 0.3461 -0.28988 2016 9 23 57654 0.2445 0.3440 -0.29132 2016 9 24 57655 0.2440 0.3418 -0.29267 2016 9 25 57656 0.2434 0.3397 -0.29402 2016 9 26 57657 0.2429 0.3376 -0.29539 2016 9 27 57658 0.2423 0.3355 -0.29683 2016 9 28 57659 0.2417 0.3335 -0.29835 2016 9 29 57660 0.2410 0.3314 -0.29993 2016 9 30 57661 0.2403 0.3293 -0.30156 2016 10 1 57662 0.2395 0.3273 -0.30321 2016 10 2 57663 0.2387 0.3252 -0.30483 2016 10 3 57664 0.2379 0.3232 -0.30641 2016 10 4 57665 0.2371 0.3212 -0.30793 2016 10 5 57666 0.2362 0.3192 -0.30938 2016 10 6 57667 0.2353 0.3172 -0.31077 2016 10 7 57668 0.2343 0.3152 -0.31210 2016 10 8 57669 0.2333 0.3133 -0.31342 2016 10 9 57670 0.2323 0.3113 -0.31476 2016 10 10 57671 0.2312 0.3094 -0.31617 2016 10 11 57672 0.2301 0.3075 -0.31771 2016 10 12 57673 0.2290 0.3056 -0.31941 2016 10 13 57674 0.2278 0.3037 -0.32130 2016 10 14 57675 0.2266 0.3018 -0.32339 2016 10 15 57676 0.2254 0.3000 -0.32562 2016 10 16 57677 0.2242 0.2982 -0.32792 2016 10 17 57678 0.2229 0.2964 -0.33018 2016 10 18 57679 0.2216 0.2946 -0.33233 2016 10 19 57680 0.2202 0.2928 -0.33431 2016 10 20 57681 0.2188 0.2911 -0.33614 2016 10 21 57682 0.2174 0.2893 -0.33786 2016 10 22 57683 0.2160 0.2876 -0.33952 2016 10 23 57684 0.2145 0.2859 -0.34118 2016 10 24 57685 0.2130 0.2843 -0.34288 2016 10 25 57686 0.2115 0.2826 -0.34463 2016 10 26 57687 0.2099 0.2810 -0.34644 2016 10 27 57688 0.2083 0.2794 -0.34828 2016 10 28 57689 0.2067 0.2779 -0.35014 2016 10 29 57690 0.2051 0.2763 -0.35197 2016 10 30 57691 0.2034 0.2748 -0.35376 2016 10 31 57692 0.2017 0.2733 -0.35548 2016 11 1 57693 0.2000 0.2719 -0.35712 2016 11 2 57694 0.1982 0.2704 -0.35868 2016 11 3 57695 0.1965 0.2690 -0.36016 2016 11 4 57696 0.1947 0.2676 -0.36160 2016 11 5 57697 0.1929 0.2663 -0.36304 2016 11 6 57698 0.1910 0.2649 -0.36451 2016 11 7 57699 0.1892 0.2636 -0.36606 2016 11 8 57700 0.1873 0.2623 -0.36774 2016 11 9 57701 0.1854 0.2611 -0.36959 2016 11 10 57702 0.1835 0.2599 -0.37161 2016 11 11 57703 0.1815 0.2587 -0.37379 2016 11 12 57704 0.1795 0.2575 -0.37608 2016 11 13 57705 0.1776 0.2564 -0.37840 2016 11 14 57706 0.1756 0.2553 -0.38065 2016 11 15 57707 0.1735 0.2542 -0.38277 2016 11 16 57708 0.1715 0.2532 -0.38472 2016 11 17 57709 0.1694 0.2522 -0.38654 2016 11 18 57710 0.1674 0.2512 -0.38827 2016 11 19 57711 0.1653 0.2503 -0.38997 2016 11 20 57712 0.1632 0.2494 -0.39170 2016 11 21 57713 0.1610 0.2485 -0.39348 2016 11 22 57714 0.1589 0.2477 -0.39530 2016 11 23 57715 0.1568 0.2469 -0.39716 2016 11 24 57716 0.1546 0.2461 -0.39905 2016 11 25 57717 0.1524 0.2453 -0.40092 2016 11 26 57718 0.1502 0.2446 -0.40278 2016 11 27 57719 0.1480 0.2439 -0.40459 2016 11 28 57720 0.1458 0.2433 -0.40634 2016 11 29 57721 0.1436 0.2427 -0.40805 2016 11 30 57722 0.1414 0.2421 -0.40972 2016 12 1 57723 0.1392 0.2416 -0.41138 2016 12 2 57724 0.1369 0.2410 -0.41304 2016 12 3 57725 0.1347 0.2406 -0.41474 2016 12 4 57726 0.1324 0.2401 -0.41650 2016 12 5 57727 0.1301 0.2397 -0.41835 2016 12 6 57728 0.1279 0.2394 -0.42030 2016 12 7 57729 0.1256 0.2390 -0.42233 2016 12 8 57730 0.1233 0.2387 -0.42445 2016 12 9 57731 0.1210 0.2384 -0.42660 2016 12 10 57732 0.1187 0.2382 -0.42875 2016 12 11 57733 0.1165 0.2380 -0.43082 2016 12 12 57734 0.1142 0.2379 -0.43275 2016 12 13 57735 0.1119 0.2377 -0.43450 2016 12 14 57736 0.1096 0.2376 -0.43606 2016 12 15 57737 0.1073 0.2376 -0.43747 2016 12 16 57738 0.1050 0.2376 -0.43878 2016 12 17 57739 0.1027 0.2376 -0.44006 2016 12 18 57740 0.1004 0.2376 -0.44135 2016 12 19 57741 0.0981 0.2377 -0.44267 2016 12 20 57742 0.0958 0.2378 -0.44402 2016 12 21 57743 0.0935 0.2380 -0.44540 2016 12 22 57744 0.0913 0.2382 -0.44679 2016 12 23 57745 0.0890 0.2384 -0.44815 2016 12 24 57746 0.0867 0.2387 -0.44946 2016 12 25 57747 0.0845 0.2390 -0.45067 2016 12 26 57748 0.0822 0.2393 -0.45178 2016 12 27 57749 0.0800 0.2396 -0.45280 2016 12 28 57750 0.0777 0.2400 -0.45374 2016 12 29 57751 0.0755 0.2405 -0.45463 2016 12 30 57752 0.0733 0.2409 -0.45552 2016 12 31 57753 0.0711 0.2414 -0.45642 2017 1 1 57754 0.0689 0.2420 -0.45739 2017 1 2 57755 0.0667 0.2425 -0.45850 2017 1 3 57756 0.0645 0.2432 -0.45979 2017 1 4 57757 0.0623 0.2438 -0.46127 2017 1 5 57758 0.0602 0.2445 -0.46287 2017 1 6 57759 0.0580 0.2452 -0.46457 2017 1 7 57760 0.0559 0.2459 -0.46628 2017 1 8 57761 0.0538 0.2467 -0.46801 2017 1 9 57762 0.0517 0.2475 -0.46962 2017 1 10 57763 0.0496 0.2483 -0.47111 2017 1 11 57764 0.0476 0.2492 -0.47247 2017 1 12 57765 0.0455 0.2501 -0.47379 2017 1 13 57766 0.0435 0.2510 -0.47510 2017 1 14 57767 0.0415 0.2519 -0.47645 2017 1 15 57768 0.0395 0.2529 -0.47786 2017 1 16 57769 0.0375 0.2540 -0.47937 2017 1 17 57770 0.0356 0.2550 -0.48100 2017 1 18 57771 0.0336 0.2561 -0.48266 2017 1 19 57772 0.0317 0.2572 -0.48422 2017 1 20 57773 0.0298 0.2583 -0.48560 2017 1 21 57774 0.0279 0.2595 -0.48686 2017 1 22 57775 0.0261 0.2607 -0.48811 2017 1 23 57776 0.0243 0.2619 -0.48936 2017 1 24 57777 0.0225 0.2632 -0.49048 2017 1 25 57778 0.0207 0.2645 -0.49155 2017 1 26 57779 0.0189 0.2658 -0.49257 2017 1 27 57780 0.0172 0.2671 -0.49366 2017 1 28 57781 0.0155 0.2685 -0.49478 2017 1 29 57782 0.0138 0.2699 -0.49607 2017 1 30 57783 0.0122 0.2713 -0.49751 2017 1 31 57784 0.0105 0.2727 -0.49908 2017 2 1 57785 0.0089 0.2742 -0.50070 2017 2 2 57786 0.0074 0.2757 -0.50237 2017 2 3 57787 0.0058 0.2772 -0.50405 2017 2 4 57788 0.0043 0.2787 -0.50574 2017 2 5 57789 0.0028 0.2803 -0.50740 2017 2 6 57790 0.0013 0.2819 -0.50898 2017 2 7 57791 -0.0001 0.2835 -0.51050 2017 2 8 57792 -0.0015 0.2851 -0.51202 2017 2 9 57793 -0.0029 0.2868 -0.51355 2017 2 10 57794 -0.0042 0.2885 -0.51510 2017 2 11 57795 -0.0055 0.2902 -0.51672 2017 2 12 57796 -0.0068 0.2919 -0.51846 2017 2 13 57797 -0.0081 0.2936 -0.52032 2017 2 14 57798 -0.0093 0.2954 -0.52220 2017 2 15 57799 -0.0105 0.2971 -0.52409 2017 2 16 57800 -0.0116 0.2989 -0.52585 2017 2 17 57801 -0.0127 0.3007 -0.52753 2017 2 18 57802 -0.0138 0.3026 -0.52908 2017 2 19 57803 -0.0149 0.3044 -0.53056 2017 2 20 57804 -0.0159 0.3063 -0.53201 2017 2 21 57805 -0.0169 0.3081 -0.53342 2017 2 22 57806 -0.0178 0.3100 -0.53484 2017 2 23 57807 -0.0188 0.3119 -0.53633 2017 2 24 57808 -0.0197 0.3138 -0.53784 2017 2 25 57809 -0.0205 0.3158 -0.53943 2017 2 26 57810 -0.0213 0.3177 -0.54127 2017 2 27 57811 -0.0221 0.3197 -0.54335 2017 2 28 57812 -0.0228 0.3216 -0.54559 2017 3 1 57813 -0.0236 0.3236 -0.54798 2017 3 2 57814 -0.0242 0.3256 -0.55041 2017 3 3 57815 -0.0249 0.3276 -0.55281 2017 3 4 57816 -0.0255 0.3296 -0.55508 2017 3 5 57817 -0.0260 0.3317 -0.55728 2017 3 6 57818 -0.0266 0.3337 -0.55934 2017 3 7 57819 -0.0271 0.3357 -0.56129 2017 3 8 57820 -0.0275 0.3378 -0.56319 2017 3 9 57821 -0.0279 0.3398 -0.56504 2017 3 10 57822 -0.0283 0.3419 -0.56695 2017 3 11 57823 -0.0287 0.3440 -0.56897 2017 3 12 57824 -0.0290 0.3460 -0.57109 2017 3 13 57825 -0.0293 0.3481 -0.57329 2017 3 14 57826 -0.0295 0.3502 -0.57547 2017 3 15 57827 -0.0297 0.3523 -0.57757 2017 3 16 57828 -0.0299 0.3544 -0.57961 2017 3 17 57829 -0.0300 0.3564 -0.58157 2017 3 18 57830 -0.0301 0.3585 -0.58342 2017 3 19 57831 -0.0301 0.3606 -0.58512 2017 3 20 57832 -0.0301 0.3627 -0.58673 2017 3 21 57833 -0.0301 0.3648 -0.58835 2017 3 22 57834 -0.0301 0.3669 -0.59003 2017 3 23 57835 -0.0300 0.3690 -0.59180 2017 3 24 57836 -0.0298 0.3711 -0.59369 2017 3 25 57837 -0.0297 0.3732 -0.59577 2017 3 26 57838 -0.0295 0.3753 -0.59798 2017 3 27 57839 -0.0292 0.3774 -0.60038 2017 3 28 57840 -0.0289 0.3794 -0.60289 2017 3 29 57841 -0.0286 0.3815 -0.60547 2017 3 30 57842 -0.0283 0.3836 -0.60805 2017 3 31 57843 -0.0279 0.3857 -0.61051 2017 4 1 57844 -0.0275 0.3877 -0.61279 2017 4 2 57845 -0.0270 0.3898 -0.61498 2017 4 3 57846 -0.0265 0.3918 -0.61699 2017 4 4 57847 -0.0260 0.3939 -0.61893 2017 4 5 57848 -0.0254 0.3959 -0.62086 2017 4 6 57849 -0.0248 0.3979 -0.62282 2017 4 7 57850 -0.0242 0.3999 -0.62484 2017 4 8 57851 -0.0235 0.4019 -0.62689 2017 4 9 57852 -0.0228 0.4039 -0.62897 2017 4 10 57853 -0.0221 0.4059 -0.63100 2017 4 11 57854 -0.0213 0.4079 -0.63306 2017 4 12 57855 -0.0205 0.4098 -0.63503 2017 4 13 57856 -0.0196 0.4118 -0.63687 2017 4 14 57857 -0.0187 0.4137 -0.63865 2017 4 15 57858 -0.0178 0.4156 -0.64024 2017 4 16 57859 -0.0169 0.4175 -0.64179 2017 4 17 57860 -0.0159 0.4194 -0.64328 2017 4 18 57861 -0.0149 0.4213 -0.64477 2017 4 19 57862 -0.0139 0.4232 -0.64624 2017 4 20 57863 -0.0128 0.4250 -0.64783 2017 4 21 57864 -0.0117 0.4268 -0.64958 2017 4 22 57865 -0.0106 0.4286 -0.65152 2017 4 23 57866 -0.0094 0.4304 -0.65360 2017 4 24 57867 -0.0082 0.4322 -0.65590 2017 4 25 57868 -0.0070 0.4340 -0.65832 2017 4 26 57869 -0.0057 0.4357 -0.66087 2017 4 27 57870 -0.0044 0.4374 -0.66342 2017 4 28 57871 -0.0031 0.4391 -0.66587 2017 4 29 57872 -0.0018 0.4408 -0.66812 2017 4 30 57873 -0.0004 0.4425 -0.67016 2017 5 1 57874 0.0010 0.4441 -0.67217 2017 5 2 57875 0.0024 0.4457 -0.67403 2017 5 3 57876 0.0039 0.4473 -0.67596 2017 5 4 57877 0.0053 0.4489 -0.67786 2017 5 5 57878 0.0068 0.4504 -0.67976 2017 5 6 57879 0.0084 0.4520 -0.68163 2017 5 7 57880 0.0099 0.4535 -0.68350 2017 5 8 57881 0.0115 0.4549 -0.68535 2017 5 9 57882 0.0131 0.4564 -0.68714 2017 5 10 57883 0.0147 0.4578 -0.68888 2017 5 11 57884 0.0164 0.4592 -0.69051 2017 5 12 57885 0.0181 0.4606 -0.69200 2017 5 13 57886 0.0198 0.4620 -0.69329 2017 5 14 57887 0.0215 0.4633 -0.69447 2017 5 15 57888 0.0232 0.4646 -0.69554 2017 5 16 57889 0.0250 0.4659 -0.69651 2017 5 17 57890 0.0268 0.4671 -0.69748 2017 5 18 57891 0.0286 0.4683 -0.69852 2017 5 19 57892 0.0304 0.4695 -0.69959 2017 5 20 57893 0.0322 0.4707 -0.70067 2017 5 21 57894 0.0341 0.4718 -0.70187 2017 5 22 57895 0.0359 0.4729 -0.70314 2017 5 23 57896 0.0378 0.4740 -0.70455 2017 5 24 57897 0.0397 0.4751 -0.70582 2017 5 25 57898 0.0417 0.4761 -0.70701 2017 5 26 57899 0.0436 0.4771 -0.70811 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) 57508 -91.57 0.30 -13.46 0.07 57509 -91.28 0.30 -13.35 0.03 57510 -91.36 0.30 -13.34 0.03 57511 -91.59 0.30 -13.30 0.03 57512 -91.78 0.30 -13.15 0.03 57513 -91.97 0.30 -13.02 0.03 57514 -92.31 0.30 -13.06 0.03 57515 -92.78 0.30 -13.24 0.03 57516 -93.18 0.18 -13.38 0.04 57517 -93.19 0.18 -13.42 0.04 57518 -92.73 0.18 -13.48 0.04 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57508 0.116 0.119 0.127 0.070 57509 0.085 0.119 0.064 0.030 57510 0.075 0.119 0.023 0.030 57511 0.084 0.119 0.040 0.030 57512 0.086 0.119 0.092 0.030 57513 0.084 0.119 0.129 0.030 57514 0.084 0.119 0.154 0.030 57515 0.088 0.119 0.167 0.030 57516 0.084 0.072 0.162 0.040 57517 0.093 0.072 0.144 0.040 57518 0.121 0.072 0.130 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).