********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 12 May 2016 Vol. XXIX No. 019 ______________________________________________________________________ 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 = -0.1 seconds beginning 24 Mar 2016 at 0000 UTC = -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 6 57514 0.04357 .00009 0.47911 .00009 -0.145016 0.000018 16 5 7 57515 0.04501 .00009 0.48027 .00009 -0.147033 0.000018 16 5 8 57516 0.04665 .00010 0.48154 .00009 -0.148896 0.000018 16 5 9 57517 0.04840 .00009 0.48286 .00009 -0.150522 0.000016 16 5 10 57518 0.05028 .00009 0.48413 .00009 -0.152037 0.000014 16 5 11 57519 0.05228 .00009 0.48529 .00009 -0.153451 0.000014 16 5 12 57520 0.05437 .00009 0.48636 .00009 -0.154825 0.000015 _______________________________________________________________________ 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 = 0.1080 - 0.0867 cos A + 0.1094 sin A + 0.0355 cos C + 0.0196 sin C y = 0.3643 + 0.1007 cos A + 0.0819 sin A + 0.0196 cos C - 0.0355 sin C UT1-UTC = -0.1272 - 0.00145 (MJD - 57528) - (UT2-UT1) where A = 2*pi*(MJD-57520)/365.25 and C = 2*pi*(MJD-57520)/435. TAI-UTC(MJD 57521) = 36.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57520)**0.80 S t = 0.00025 (MJD-57520)**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 13 57521 0.0565 0.4873 -0.15624 2016 5 14 57522 0.0586 0.4882 -0.15775 2016 5 15 57523 0.0607 0.4890 -0.15934 2016 5 16 57524 0.0628 0.4898 -0.16098 2016 5 17 57525 0.0649 0.4905 -0.16261 2016 5 18 57526 0.0671 0.4911 -0.16419 2016 5 19 57527 0.0693 0.4917 -0.16568 2016 5 20 57528 0.0715 0.4923 -0.16708 2016 5 21 57529 0.0737 0.4928 -0.16840 2016 5 22 57530 0.0760 0.4933 -0.16965 2016 5 23 57531 0.0783 0.4939 -0.17083 2016 5 24 57532 0.0806 0.4943 -0.17191 2016 5 25 57533 0.0828 0.4947 -0.17292 2016 5 26 57534 0.0851 0.4951 -0.17393 2016 5 27 57535 0.0875 0.4954 -0.17500 2016 5 28 57536 0.0898 0.4957 -0.17617 2016 5 29 57537 0.0921 0.4960 -0.17746 2016 5 30 57538 0.0944 0.4962 -0.17886 2016 5 31 57539 0.0967 0.4964 -0.18037 2016 6 1 57540 0.0990 0.4965 -0.18192 2016 6 2 57541 0.1013 0.4967 -0.18342 2016 6 3 57542 0.1036 0.4967 -0.18483 2016 6 4 57543 0.1059 0.4968 -0.18608 2016 6 5 57544 0.1083 0.4968 -0.18715 2016 6 6 57545 0.1106 0.4968 -0.18807 2016 6 7 57546 0.1129 0.4967 -0.18889 2016 6 8 57547 0.1152 0.4966 -0.18967 2016 6 9 57548 0.1175 0.4965 -0.19045 2016 6 10 57549 0.1198 0.4963 -0.19126 2016 6 11 57550 0.1221 0.4961 -0.19209 2016 6 12 57551 0.1244 0.4959 -0.19293 2016 6 13 57552 0.1267 0.4956 -0.19376 2016 6 14 57553 0.1290 0.4953 -0.19457 2016 6 15 57554 0.1312 0.4949 -0.19535 2016 6 16 57555 0.1335 0.4945 -0.19607 2016 6 17 57556 0.1358 0.4941 -0.19672 2016 6 18 57557 0.1380 0.4937 -0.19729 2016 6 19 57558 0.1403 0.4932 -0.19778 2016 6 20 57559 0.1425 0.4927 -0.19823 2016 6 21 57560 0.1447 0.4921 -0.19865 2016 6 22 57561 0.1470 0.4915 -0.19910 2016 6 23 57562 0.1492 0.4909 -0.19961 2016 6 24 57563 0.1514 0.4903 -0.20023 2016 6 25 57564 0.1536 0.4896 -0.20098 2016 6 26 57565 0.1557 0.4888 -0.20186 2016 6 27 57566 0.1579 0.4881 -0.20287 2016 6 28 57567 0.1600 0.4873 -0.20395 2016 6 29 57568 0.1622 0.4865 -0.20504 2016 6 30 57569 0.1643 0.4856 -0.20607 2016 7 1 57570 0.1664 0.4848 -0.20699 2016 7 2 57571 0.1685 0.4838 -0.20777 2016 7 3 57572 0.1705 0.4829 -0.20841 2016 7 4 57573 0.1726 0.4819 -0.20896 2016 7 5 57574 0.1746 0.4809 -0.20947 2016 7 6 57575 0.1766 0.4799 -0.20998 2016 7 7 57576 0.1786 0.4788 -0.21053 2016 7 8 57577 0.1806 0.4777 -0.21111 2016 7 9 57578 0.1826 0.4766 -0.21173 2016 7 10 57579 0.1845 0.4754 -0.21237 2016 7 11 57580 0.1864 0.4742 -0.21299 2016 7 12 57581 0.1883 0.4730 -0.21358 2016 7 13 57582 0.1902 0.4717 -0.21411 2016 7 14 57583 0.1921 0.4704 -0.21456 2016 7 15 57584 0.1939 0.4691 -0.21492 2016 7 16 57585 0.1957 0.4678 -0.21522 2016 7 17 57586 0.1975 0.4664 -0.21547 2016 7 18 57587 0.1992 0.4650 -0.21570 2016 7 19 57588 0.2010 0.4636 -0.21596 2016 7 20 57589 0.2027 0.4622 -0.21629 2016 7 21 57590 0.2043 0.4607 -0.21674 2016 7 22 57591 0.2060 0.4592 -0.21735 2016 7 23 57592 0.2076 0.4577 -0.21812 2016 7 24 57593 0.2092 0.4561 -0.21904 2016 7 25 57594 0.2108 0.4546 -0.22005 2016 7 26 57595 0.2123 0.4530 -0.22109 2016 7 27 57596 0.2138 0.4514 -0.22210 2016 7 28 57597 0.2153 0.4497 -0.22303 2016 7 29 57598 0.2168 0.4480 -0.22384 2016 7 30 57599 0.2182 0.4464 -0.22455 2016 7 31 57600 0.2196 0.4447 -0.22518 2016 8 1 57601 0.2210 0.4429 -0.22577 2016 8 2 57602 0.2223 0.4412 -0.22639 2016 8 3 57603 0.2236 0.4394 -0.22706 2016 8 4 57604 0.2249 0.4376 -0.22780 2016 8 5 57605 0.2261 0.4358 -0.22861 2016 8 6 57606 0.2273 0.4340 -0.22945 2016 8 7 57607 0.2285 0.4321 -0.23031 2016 8 8 57608 0.2296 0.4302 -0.23115 2016 8 9 57609 0.2307 0.4284 -0.23196 2016 8 10 57610 0.2318 0.4265 -0.23271 2016 8 11 57611 0.2328 0.4245 -0.23340 2016 8 12 57612 0.2338 0.4226 -0.23402 2016 8 13 57613 0.2348 0.4206 -0.23460 2016 8 14 57614 0.2357 0.4187 -0.23515 2016 8 15 57615 0.2366 0.4167 -0.23573 2016 8 16 57616 0.2375 0.4147 -0.23636 2016 8 17 57617 0.2383 0.4127 -0.23709 2016 8 18 57618 0.2391 0.4107 -0.23798 2016 8 19 57619 0.2399 0.4086 -0.23905 2016 8 20 57620 0.2406 0.4066 -0.24027 2016 8 21 57621 0.2413 0.4045 -0.24162 2016 8 22 57622 0.2419 0.4025 -0.24301 2016 8 23 57623 0.2425 0.4004 -0.24436 2016 8 24 57624 0.2431 0.3983 -0.24561 2016 8 25 57625 0.2436 0.3962 -0.24673 2016 8 26 57626 0.2441 0.3941 -0.24772 2016 8 27 57627 0.2446 0.3920 -0.24861 2016 8 28 57628 0.2450 0.3899 -0.24946 2016 8 29 57629 0.2454 0.3878 -0.25031 2016 8 30 57630 0.2457 0.3856 -0.25122 2016 8 31 57631 0.2460 0.3835 -0.25221 2016 9 1 57632 0.2463 0.3814 -0.25328 2016 9 2 57633 0.2465 0.3792 -0.25442 2016 9 3 57634 0.2467 0.3771 -0.25559 2016 9 4 57635 0.2469 0.3749 -0.25677 2016 9 5 57636 0.2470 0.3727 -0.25793 2016 9 6 57637 0.2471 0.3706 -0.25905 2016 9 7 57638 0.2471 0.3684 -0.26010 2016 9 8 57639 0.2471 0.3663 -0.26109 2016 9 9 57640 0.2471 0.3641 -0.26203 2016 9 10 57641 0.2470 0.3620 -0.26294 2016 9 11 57642 0.2469 0.3598 -0.26387 2016 9 12 57643 0.2468 0.3576 -0.26484 2016 9 13 57644 0.2466 0.3555 -0.26592 2016 9 14 57645 0.2463 0.3533 -0.26715 2016 9 15 57646 0.2461 0.3512 -0.26857 2016 9 16 57647 0.2458 0.3490 -0.27020 2016 9 17 57648 0.2454 0.3469 -0.27199 2016 9 18 57649 0.2450 0.3448 -0.27388 2016 9 19 57650 0.2446 0.3426 -0.27578 2016 9 20 57651 0.2442 0.3405 -0.27760 2016 9 21 57652 0.2437 0.3384 -0.27929 2016 9 22 57653 0.2431 0.3363 -0.28083 2016 9 23 57654 0.2426 0.3342 -0.28225 2016 9 24 57655 0.2420 0.3321 -0.28359 2016 9 25 57656 0.2413 0.3300 -0.28492 2016 9 26 57657 0.2406 0.3279 -0.28629 2016 9 27 57658 0.2399 0.3259 -0.28773 2016 9 28 57659 0.2392 0.3238 -0.28924 2016 9 29 57660 0.2384 0.3218 -0.29082 2016 9 30 57661 0.2376 0.3197 -0.29245 2016 10 1 57662 0.2367 0.3177 -0.29410 2016 10 2 57663 0.2358 0.3157 -0.29573 2016 10 3 57664 0.2349 0.3137 -0.29731 2016 10 4 57665 0.2339 0.3117 -0.29884 2016 10 5 57666 0.2329 0.3098 -0.30030 2016 10 6 57667 0.2319 0.3078 -0.30169 2016 10 7 57668 0.2308 0.3059 -0.30303 2016 10 8 57669 0.2297 0.3040 -0.30436 2016 10 9 57670 0.2286 0.3021 -0.30571 2016 10 10 57671 0.2274 0.3002 -0.30714 2016 10 11 57672 0.2262 0.2983 -0.30868 2016 10 12 57673 0.2249 0.2965 -0.31040 2016 10 13 57674 0.2237 0.2947 -0.31231 2016 10 14 57675 0.2224 0.2928 -0.31441 2016 10 15 57676 0.2210 0.2911 -0.31666 2016 10 16 57677 0.2197 0.2893 -0.31897 2016 10 17 57678 0.2183 0.2875 -0.32125 2016 10 18 57679 0.2168 0.2858 -0.32342 2016 10 19 57680 0.2154 0.2841 -0.32542 2016 10 20 57681 0.2139 0.2824 -0.32726 2016 10 21 57682 0.2124 0.2808 -0.32899 2016 10 22 57683 0.2108 0.2791 -0.33066 2016 10 23 57684 0.2093 0.2775 -0.33234 2016 10 24 57685 0.2077 0.2759 -0.33406 2016 10 25 57686 0.2060 0.2744 -0.33583 2016 10 26 57687 0.2044 0.2728 -0.33765 2016 10 27 57688 0.2027 0.2713 -0.33952 2016 10 28 57689 0.2010 0.2698 -0.34140 2016 10 29 57690 0.1993 0.2684 -0.34326 2016 10 30 57691 0.1975 0.2669 -0.34507 2016 10 31 57692 0.1957 0.2655 -0.34682 2016 11 1 57693 0.1939 0.2641 -0.34848 2016 11 2 57694 0.1921 0.2628 -0.35007 2016 11 3 57695 0.1902 0.2614 -0.35159 2016 11 4 57696 0.1883 0.2601 -0.35307 2016 11 5 57697 0.1864 0.2589 -0.35454 2016 11 6 57698 0.1845 0.2576 -0.35606 2016 11 7 57699 0.1826 0.2564 -0.35767 2016 11 8 57700 0.1806 0.2552 -0.35942 2016 11 9 57701 0.1786 0.2541 -0.36134 2016 11 10 57702 0.1766 0.2530 -0.36345 2016 11 11 57703 0.1746 0.2519 -0.36575 2016 11 12 57704 0.1725 0.2508 -0.36817 2016 11 13 57705 0.1705 0.2498 -0.37064 2016 11 14 57706 0.1684 0.2488 -0.37307 2016 11 15 57707 0.1663 0.2478 -0.37539 2016 11 16 57708 0.1642 0.2469 -0.37758 2016 11 17 57709 0.1620 0.2460 -0.37965 2016 11 18 57710 0.1599 0.2451 -0.38165 2016 11 19 57711 0.1577 0.2443 -0.38360 2016 11 20 57712 0.1556 0.2435 -0.38555 2016 11 21 57713 0.1534 0.2427 -0.38747 2016 11 22 57714 0.1512 0.2420 -0.38937 2016 11 23 57715 0.1490 0.2413 -0.39121 2016 11 24 57716 0.1468 0.2406 -0.39299 2016 11 25 57717 0.1445 0.2400 -0.39467 2016 11 26 57718 0.1423 0.2394 -0.39625 2016 11 27 57719 0.1400 0.2388 -0.39771 2016 11 28 57720 0.1378 0.2383 -0.39904 2016 11 29 57721 0.1355 0.2378 -0.40026 2016 11 30 57722 0.1332 0.2373 -0.40139 2016 12 1 57723 0.1309 0.2369 -0.40246 2016 12 2 57724 0.1286 0.2365 -0.40351 2016 12 3 57725 0.1263 0.2361 -0.40457 2016 12 4 57726 0.1240 0.2358 -0.40570 2016 12 5 57727 0.1217 0.2355 -0.40692 2016 12 6 57728 0.1194 0.2353 -0.40828 2016 12 7 57729 0.1171 0.2350 -0.40979 2016 12 8 57730 0.1148 0.2349 -0.41147 2016 12 9 57731 0.1125 0.2347 -0.41329 2016 12 10 57732 0.1101 0.2346 -0.41519 2016 12 11 57733 0.1078 0.2345 -0.41710 2016 12 12 57734 0.1055 0.2345 -0.41895 2016 12 13 57735 0.1032 0.2345 -0.42066 2016 12 14 57736 0.1008 0.2345 -0.42224 2016 12 15 57737 0.0985 0.2346 -0.42369 2016 12 16 57738 0.0962 0.2347 -0.42509 2016 12 17 57739 0.0939 0.2348 -0.42648 2016 12 18 57740 0.0916 0.2350 -0.42791 2016 12 19 57741 0.0893 0.2352 -0.42942 2016 12 20 57742 0.0870 0.2354 -0.43103 2016 12 21 57743 0.0847 0.2357 -0.43269 2016 12 22 57744 0.0824 0.2360 -0.43426 2016 12 23 57745 0.0801 0.2364 -0.43569 2016 12 24 57746 0.0778 0.2368 -0.43698 2016 12 25 57747 0.0755 0.2372 -0.43828 2016 12 26 57748 0.0733 0.2377 -0.43956 2016 12 27 57749 0.0710 0.2381 -0.44070 2016 12 28 57750 0.0688 0.2387 -0.44174 2016 12 29 57751 0.0666 0.2392 -0.44272 2016 12 30 57752 0.0643 0.2398 -0.44372 2016 12 31 57753 0.0621 0.2404 -0.44470 2017 1 1 57754 0.0599 0.2411 -0.44580 2017 1 2 57755 0.0577 0.2418 -0.44703 2017 1 3 57756 0.0556 0.2425 -0.44838 2017 1 4 57757 0.0534 0.2433 -0.44980 2017 1 5 57758 0.0513 0.2441 -0.45130 2017 1 6 57759 0.0491 0.2449 -0.45288 2017 1 7 57760 0.0470 0.2458 -0.45451 2017 1 8 57761 0.0449 0.2467 -0.45616 2017 1 9 57762 0.0429 0.2476 -0.45773 2017 1 10 57763 0.0408 0.2485 -0.45922 2017 1 11 57764 0.0388 0.2495 -0.46065 2017 1 12 57765 0.0367 0.2505 -0.46206 2017 1 13 57766 0.0347 0.2516 -0.46343 2017 1 14 57767 0.0327 0.2527 -0.46484 2017 1 15 57768 0.0308 0.2538 -0.46636 2017 1 16 57769 0.0288 0.2549 -0.46799 2017 1 17 57770 0.0269 0.2561 -0.46964 2017 1 18 57771 0.0250 0.2573 -0.47130 2017 1 19 57772 0.0231 0.2585 -0.47286 2017 1 20 57773 0.0213 0.2598 -0.47435 2017 1 21 57774 0.0194 0.2611 -0.47571 2017 1 22 57775 0.0176 0.2624 -0.47700 2017 1 23 57776 0.0158 0.2637 -0.47825 2017 1 24 57777 0.0141 0.2651 -0.47944 2017 1 25 57778 0.0123 0.2665 -0.48061 2017 1 26 57779 0.0106 0.2679 -0.48182 2017 1 27 57780 0.0090 0.2694 -0.48302 2017 1 28 57781 0.0073 0.2708 -0.48425 2017 1 29 57782 0.0057 0.2723 -0.48570 2017 1 30 57783 0.0041 0.2739 -0.48736 2017 1 31 57784 0.0025 0.2754 -0.48920 2017 2 1 57785 0.0009 0.2770 -0.49121 2017 2 2 57786 -0.0006 0.2786 -0.49330 2017 2 3 57787 -0.0021 0.2802 -0.49542 2017 2 4 57788 -0.0035 0.2819 -0.49748 2017 2 5 57789 -0.0049 0.2835 -0.49949 2017 2 6 57790 -0.0063 0.2852 -0.50137 2017 2 7 57791 -0.0077 0.2869 -0.50311 2017 2 8 57792 -0.0090 0.2887 -0.50478 2017 2 9 57793 -0.0103 0.2904 -0.50636 2017 2 10 57794 -0.0116 0.2922 -0.50799 2017 2 11 57795 -0.0129 0.2940 -0.50972 2017 2 12 57796 -0.0141 0.2958 -0.51155 2017 2 13 57797 -0.0152 0.2976 -0.51348 2017 2 14 57798 -0.0164 0.2995 -0.51541 2017 2 15 57799 -0.0175 0.3013 -0.51729 2017 2 16 57800 -0.0186 0.3032 -0.51912 2017 2 17 57801 -0.0196 0.3051 -0.52089 2017 2 18 57802 -0.0206 0.3070 -0.52255 2017 2 19 57803 -0.0216 0.3090 -0.52407 2017 2 20 57804 -0.0225 0.3109 -0.52549 2017 2 21 57805 -0.0234 0.3129 -0.52691 2017 2 22 57806 -0.0243 0.3148 -0.52837 2017 2 23 57807 -0.0251 0.3168 -0.52989 2017 2 24 57808 -0.0259 0.3188 -0.53152 2017 2 25 57809 -0.0267 0.3208 -0.53332 2017 2 26 57810 -0.0274 0.3229 -0.53523 2017 2 27 57811 -0.0281 0.3249 -0.53734 2017 2 28 57812 -0.0288 0.3269 -0.53957 2017 3 1 57813 -0.0294 0.3290 -0.54191 2017 3 2 57814 -0.0300 0.3311 -0.54430 2017 3 3 57815 -0.0305 0.3331 -0.54661 2017 3 4 57816 -0.0310 0.3352 -0.54880 2017 3 5 57817 -0.0315 0.3373 -0.55092 2017 3 6 57818 -0.0319 0.3394 -0.55285 2017 3 7 57819 -0.0323 0.3415 -0.55470 2017 3 8 57820 -0.0326 0.3436 -0.55653 2017 3 9 57821 -0.0330 0.3457 -0.55836 2017 3 10 57822 -0.0332 0.3478 -0.56027 2017 3 11 57823 -0.0335 0.3500 -0.56224 2017 3 12 57824 -0.0337 0.3521 -0.56426 2017 3 13 57825 -0.0339 0.3542 -0.56628 2017 3 14 57826 -0.0340 0.3564 -0.56836 2017 3 15 57827 -0.0341 0.3585 -0.57037 2017 3 16 57828 -0.0341 0.3606 -0.57229 2017 3 17 57829 -0.0342 0.3628 -0.57416 2017 3 18 57830 -0.0341 0.3649 -0.57584 2017 3 19 57831 -0.0341 0.3670 -0.57750 2017 3 20 57832 -0.0340 0.3692 -0.57909 2017 3 21 57833 -0.0338 0.3713 -0.58066 2017 3 22 57834 -0.0337 0.3734 -0.58220 2017 3 23 57835 -0.0335 0.3756 -0.58386 2017 3 24 57836 -0.0332 0.3777 -0.58566 2017 3 25 57837 -0.0329 0.3798 -0.58766 2017 3 26 57838 -0.0326 0.3819 -0.58980 2017 3 27 57839 -0.0322 0.3841 -0.59218 2017 3 28 57840 -0.0318 0.3862 -0.59471 2017 3 29 57841 -0.0314 0.3883 -0.59741 2017 3 30 57842 -0.0309 0.3904 -0.60015 2017 3 31 57843 -0.0304 0.3925 -0.60284 2017 4 1 57844 -0.0299 0.3945 -0.60535 2017 4 2 57845 -0.0293 0.3966 -0.60765 2017 4 3 57846 -0.0287 0.3987 -0.60990 2017 4 4 57847 -0.0280 0.4007 -0.61198 2017 4 5 57848 -0.0274 0.4028 -0.61411 2017 4 6 57849 -0.0266 0.4048 -0.61622 2017 4 7 57850 -0.0259 0.4068 -0.61835 2017 4 8 57851 -0.0251 0.4088 -0.62049 2017 4 9 57852 -0.0243 0.4108 -0.62268 2017 4 10 57853 -0.0234 0.4128 -0.62489 2017 4 11 57854 -0.0225 0.4148 -0.62708 2017 4 12 57855 -0.0216 0.4167 -0.62924 2017 4 13 57856 -0.0206 0.4187 -0.63132 2017 4 14 57857 -0.0196 0.4206 -0.63326 2017 4 15 57858 -0.0186 0.4225 -0.63502 2017 4 16 57859 -0.0175 0.4244 -0.63664 2017 4 17 57860 -0.0164 0.4263 -0.63816 2017 4 18 57861 -0.0153 0.4282 -0.63953 2017 4 19 57862 -0.0141 0.4300 -0.64094 2017 4 20 57863 -0.0129 0.4319 -0.64238 2017 4 21 57864 -0.0117 0.4337 -0.64383 2017 4 22 57865 -0.0104 0.4355 -0.64536 2017 4 23 57866 -0.0092 0.4372 -0.64695 2017 4 24 57867 -0.0078 0.4390 -0.64865 2017 4 25 57868 -0.0065 0.4407 -0.65055 2017 4 26 57869 -0.0051 0.4424 -0.65234 2017 4 27 57870 -0.0037 0.4441 -0.65411 2017 4 28 57871 -0.0023 0.4458 -0.65578 2017 4 29 57872 -0.0008 0.4474 -0.65729 2017 4 30 57873 0.0007 0.4491 -0.65867 2017 5 1 57874 0.0022 0.4507 -0.65999 2017 5 2 57875 0.0037 0.4522 -0.66138 2017 5 3 57876 0.0053 0.4538 -0.66282 2017 5 4 57877 0.0069 0.4553 -0.66427 2017 5 5 57878 0.0085 0.4568 -0.66575 2017 5 6 57879 0.0102 0.4583 -0.66723 2017 5 7 57880 0.0118 0.4598 -0.66874 2017 5 8 57881 0.0135 0.4612 -0.67015 2017 5 9 57882 0.0153 0.4626 -0.67149 2017 5 10 57883 0.0170 0.4640 -0.67273 2017 5 11 57884 0.0188 0.4653 -0.67389 2017 5 12 57885 0.0206 0.4666 -0.67493 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) 57498 -91.72 0.30 -13.09 0.05 57499 -91.88 0.30 -12.96 0.05 57500 -92.07 0.30 -13.02 0.05 57501 -92.22 0.30 -13.19 0.06 57502 -92.33 0.30 -13.33 0.04 57503 -92.41 0.30 -13.41 0.07 57504 -92.54 0.30 -13.51 0.08 57505 -92.66 0.10 -13.64 0.08 57506 -92.55 0.10 -13.69 0.08 57507 -92.09 0.10 -13.58 0.08 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57498 0.078 0.119 0.078 0.050 57499 0.067 0.119 0.083 0.050 57500 0.062 0.119 0.060 0.050 57501 0.057 0.119 0.039 0.060 57502 0.054 0.119 0.043 0.040 57503 0.074 0.119 0.064 0.070 57504 0.102 0.119 0.083 0.080 57505 0.130 0.040 0.112 0.080 57506 0.152 0.040 0.164 0.080 57507 0.157 0.040 0.209 0.080 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).