********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 11 May 2017 Vol. XXX 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 = +0.4 seconds beginning 30 Mar 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. * * * * From Tuesday, 2 May 2017 through Friday, 12 May 2017 the Naval * * Observatory will perform scheduled network maintenance. Network * * degradations or outages impacting our product delivery are possible * * but should be temporary in nature. Please see above for details on * * accessing the backup EO server in the event of an outage. * * * * 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 5 5 57878 0.04317 .00009 0.43657 .00009 0.416081 0.000016 17 5 6 57879 0.04519 .00009 0.43786 .00009 0.414519 0.000014 17 5 7 57880 0.04763 .00009 0.43909 .00009 0.412901 0.000015 17 5 8 57881 0.04994 .00009 0.44045 .00009 0.411330 0.000014 17 5 9 57882 0.05194 .00009 0.44181 .00009 0.409887 0.000014 17 5 10 57883 0.05397 .00009 0.44311 .00009 0.408549 0.000014 17 5 11 57884 0.05622 .00009 0.44442 .00009 0.407259 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 = 0.1220 - 0.0245 cos A + 0.0920 sin A - 0.0405 cos C - 0.0146 sin C y = 0.3703 + 0.0848 cos A + 0.0271 sin A - 0.0146 cos C + 0.0405 sin C UT1-UTC = 0.4381 - 0.00115 (MJD - 57892) - (UT2-UT1) where A = 2*pi*(MJD-57884)/365.25 and C = 2*pi*(MJD-57884)/435. TAI-UTC(MJD 57885) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57884)**0.80 S t = 0.00025 (MJD-57884)**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 5 12 57885 0.0583 0.4458 0.40605 2017 5 13 57886 0.0603 0.4470 0.40492 2017 5 14 57887 0.0621 0.4480 0.40386 2017 5 15 57888 0.0638 0.4490 0.40286 2017 5 16 57889 0.0653 0.4499 0.40187 2017 5 17 57890 0.0668 0.4507 0.40087 2017 5 18 57891 0.0683 0.4514 0.39981 2017 5 19 57892 0.0700 0.4521 0.39865 2017 5 20 57893 0.0716 0.4528 0.39734 2017 5 21 57894 0.0732 0.4534 0.39586 2017 5 22 57895 0.0748 0.4540 0.39423 2017 5 23 57896 0.0763 0.4546 0.39255 2017 5 24 57897 0.0779 0.4551 0.39090 2017 5 25 57898 0.0796 0.4556 0.38938 2017 5 26 57899 0.0813 0.4560 0.38803 2017 5 27 57900 0.0829 0.4565 0.38685 2017 5 28 57901 0.0846 0.4569 0.38582 2017 5 29 57902 0.0864 0.4572 0.38487 2017 5 30 57903 0.0881 0.4576 0.38392 2017 5 31 57904 0.0899 0.4579 0.38293 2017 6 1 57905 0.0916 0.4582 0.38188 2017 6 2 57906 0.0934 0.4585 0.38079 2017 6 3 57907 0.0951 0.4587 0.37971 2017 6 4 57908 0.0968 0.4589 0.37864 2017 6 5 57909 0.0985 0.4591 0.37764 2017 6 6 57910 0.1002 0.4592 0.37675 2017 6 7 57911 0.1019 0.4593 0.37598 2017 6 8 57912 0.1036 0.4594 0.37536 2017 6 9 57913 0.1053 0.4594 0.37487 2017 6 10 57914 0.1070 0.4595 0.37451 2017 6 11 57915 0.1087 0.4595 0.37422 2017 6 12 57916 0.1104 0.4594 0.37398 2017 6 13 57917 0.1121 0.4594 0.37373 2017 6 14 57918 0.1138 0.4593 0.37343 2017 6 15 57919 0.1155 0.4591 0.37304 2017 6 16 57920 0.1172 0.4590 0.37253 2017 6 17 57921 0.1189 0.4588 0.37189 2017 6 18 57922 0.1206 0.4586 0.37114 2017 6 19 57923 0.1222 0.4584 0.37031 2017 6 20 57924 0.1239 0.4581 0.36948 2017 6 21 57925 0.1256 0.4578 0.36869 2017 6 22 57926 0.1273 0.4575 0.36802 2017 6 23 57927 0.1289 0.4572 0.36750 2017 6 24 57928 0.1306 0.4568 0.36710 2017 6 25 57929 0.1322 0.4564 0.36678 2017 6 26 57930 0.1338 0.4560 0.36647 2017 6 27 57931 0.1355 0.4556 0.36613 2017 6 28 57932 0.1371 0.4551 0.36574 2017 6 29 57933 0.1387 0.4546 0.36531 2017 6 30 57934 0.1403 0.4541 0.36488 2017 7 1 57935 0.1419 0.4535 0.36448 2017 7 2 57936 0.1434 0.4530 0.36413 2017 7 3 57937 0.1450 0.4524 0.36388 2017 7 4 57938 0.1465 0.4517 0.36373 2017 7 5 57939 0.1481 0.4511 0.36368 2017 7 6 57940 0.1496 0.4504 0.36372 2017 7 7 57941 0.1511 0.4497 0.36385 2017 7 8 57942 0.1526 0.4490 0.36404 2017 7 9 57943 0.1541 0.4483 0.36425 2017 7 10 57944 0.1555 0.4475 0.36443 2017 7 11 57945 0.1570 0.4467 0.36456 2017 7 12 57946 0.1584 0.4459 0.36458 2017 7 13 57947 0.1599 0.4450 0.36447 2017 7 14 57948 0.1613 0.4442 0.36423 2017 7 15 57949 0.1626 0.4433 0.36387 2017 7 16 57950 0.1640 0.4424 0.36341 2017 7 17 57951 0.1654 0.4415 0.36292 2017 7 18 57952 0.1667 0.4405 0.36243 2017 7 19 57953 0.1680 0.4395 0.36202 2017 7 20 57954 0.1693 0.4385 0.36171 2017 7 21 57955 0.1706 0.4375 0.36150 2017 7 22 57956 0.1718 0.4365 0.36134 2017 7 23 57957 0.1731 0.4354 0.36119 2017 7 24 57958 0.1743 0.4344 0.36098 2017 7 25 57959 0.1755 0.4333 0.36067 2017 7 26 57960 0.1766 0.4322 0.36027 2017 7 27 57961 0.1778 0.4310 0.35982 2017 7 28 57962 0.1789 0.4299 0.35935 2017 7 29 57963 0.1800 0.4287 0.35892 2017 7 30 57964 0.1811 0.4275 0.35856 2017 7 31 57965 0.1822 0.4263 0.35829 2017 8 1 57966 0.1832 0.4251 0.35814 2017 8 2 57967 0.1842 0.4239 0.35808 2017 8 3 57968 0.1852 0.4226 0.35811 2017 8 4 57969 0.1862 0.4213 0.35819 2017 8 5 57970 0.1871 0.4200 0.35829 2017 8 6 57971 0.1880 0.4187 0.35836 2017 8 7 57972 0.1889 0.4174 0.35836 2017 8 8 57973 0.1898 0.4161 0.35825 2017 8 9 57974 0.1907 0.4147 0.35799 2017 8 10 57975 0.1915 0.4134 0.35757 2017 8 11 57976 0.1923 0.4120 0.35701 2017 8 12 57977 0.1930 0.4106 0.35633 2017 8 13 57978 0.1938 0.4092 0.35560 2017 8 14 57979 0.1945 0.4078 0.35488 2017 8 15 57980 0.1952 0.4064 0.35421 2017 8 16 57981 0.1958 0.4049 0.35362 2017 8 17 57982 0.1964 0.4035 0.35312 2017 8 18 57983 0.1970 0.4020 0.35269 2017 8 19 57984 0.1976 0.4006 0.35226 2017 8 20 57985 0.1982 0.3991 0.35178 2017 8 21 57986 0.1987 0.3976 0.35120 2017 8 22 57987 0.1992 0.3961 0.35049 2017 8 23 57988 0.1996 0.3946 0.34967 2017 8 24 57989 0.2001 0.3931 0.34880 2017 8 25 57990 0.2005 0.3916 0.34792 2017 8 26 57991 0.2008 0.3900 0.34710 2017 8 27 57992 0.2012 0.3885 0.34635 2017 8 28 57993 0.2015 0.3870 0.34573 2017 8 29 57994 0.2018 0.3854 0.34521 2017 8 30 57995 0.2020 0.3839 0.34477 2017 8 31 57996 0.2023 0.3823 0.34440 2017 9 1 57997 0.2025 0.3808 0.34405 2017 9 2 57998 0.2026 0.3792 0.34369 2017 9 3 57999 0.2028 0.3776 0.34326 2017 9 4 58000 0.2029 0.3761 0.34272 2017 9 5 58001 0.2030 0.3745 0.34203 2017 9 6 58002 0.2030 0.3729 0.34117 2017 9 7 58003 0.2031 0.3713 0.34015 2017 9 8 58004 0.2030 0.3698 0.33900 2017 9 9 58005 0.2030 0.3682 0.33777 2017 9 10 58006 0.2029 0.3666 0.33654 2017 9 11 58007 0.2029 0.3650 0.33538 2017 9 12 58008 0.2027 0.3635 0.33431 2017 9 13 58009 0.2026 0.3619 0.33334 2017 9 14 58010 0.2024 0.3603 0.33245 2017 9 15 58011 0.2022 0.3588 0.33158 2017 9 16 58012 0.2019 0.3572 0.33068 2017 9 17 58013 0.2017 0.3556 0.32969 2017 9 18 58014 0.2014 0.3541 0.32858 2017 9 19 58015 0.2010 0.3525 0.32735 2017 9 20 58016 0.2007 0.3510 0.32604 2017 9 21 58017 0.2003 0.3494 0.32469 2017 9 22 58018 0.1999 0.3479 0.32337 2017 9 23 58019 0.1994 0.3463 0.32212 2017 9 24 58020 0.1990 0.3448 0.32097 2017 9 25 58021 0.1985 0.3433 0.31993 2017 9 26 58022 0.1979 0.3418 0.31899 2017 9 27 58023 0.1974 0.3403 0.31813 2017 9 28 58024 0.1968 0.3388 0.31731 2017 9 29 58025 0.1962 0.3373 0.31650 2017 9 30 58026 0.1955 0.3358 0.31564 2017 10 1 58027 0.1949 0.3343 0.31469 2017 10 2 58028 0.1942 0.3329 0.31361 2017 10 3 58029 0.1934 0.3314 0.31236 2017 10 4 58030 0.1927 0.3300 0.31094 2017 10 5 58031 0.1919 0.3286 0.30936 2017 10 6 58032 0.1911 0.3272 0.30768 2017 10 7 58033 0.1903 0.3258 0.30596 2017 10 8 58034 0.1894 0.3244 0.30429 2017 10 9 58035 0.1886 0.3230 0.30273 2017 10 10 58036 0.1876 0.3216 0.30130 2017 10 11 58037 0.1867 0.3203 0.29998 2017 10 12 58038 0.1858 0.3189 0.29873 2017 10 13 58039 0.1848 0.3176 0.29748 2017 10 14 58040 0.1838 0.3163 0.29617 2017 10 15 58041 0.1828 0.3150 0.29476 2017 10 16 58042 0.1817 0.3137 0.29325 2017 10 17 58043 0.1806 0.3125 0.29165 2017 10 18 58044 0.1795 0.3112 0.29000 2017 10 19 58045 0.1784 0.3100 0.28836 2017 10 20 58046 0.1773 0.3088 0.28678 2017 10 21 58047 0.1761 0.3076 0.28528 2017 10 22 58048 0.1749 0.3064 0.28391 2017 10 23 58049 0.1737 0.3053 0.28264 2017 10 24 58050 0.1725 0.3042 0.28148 2017 10 25 58051 0.1712 0.3030 0.28039 2017 10 26 58052 0.1700 0.3019 0.27934 2017 10 27 58053 0.1687 0.3009 0.27827 2017 10 28 58054 0.1674 0.2998 0.27714 2017 10 29 58055 0.1660 0.2988 0.27591 2017 10 30 58056 0.1647 0.2977 0.27454 2017 10 31 58057 0.1633 0.2968 0.27301 2017 11 1 58058 0.1619 0.2958 0.27132 2017 11 2 58059 0.1605 0.2948 0.26949 2017 11 3 58060 0.1591 0.2939 0.26759 2017 11 4 58061 0.1577 0.2930 0.26570 2017 11 5 58062 0.1562 0.2921 0.26389 2017 11 6 58063 0.1548 0.2912 0.26223 2017 11 7 58064 0.1533 0.2904 0.26070 2017 11 8 58065 0.1518 0.2896 0.25929 2017 11 9 58066 0.1503 0.2888 0.25791 2017 11 10 58067 0.1488 0.2880 0.25651 2017 11 11 58068 0.1472 0.2873 0.25504 2017 11 12 58069 0.1457 0.2865 0.25349 2017 11 13 58070 0.1441 0.2858 0.25186 2017 11 14 58071 0.1425 0.2852 0.25019 2017 11 15 58072 0.1409 0.2845 0.24852 2017 11 16 58073 0.1393 0.2839 0.24690 2017 11 17 58074 0.1377 0.2833 0.24535 2017 11 18 58075 0.1361 0.2827 0.24391 2017 11 19 58076 0.1345 0.2822 0.24257 2017 11 20 58077 0.1328 0.2817 0.24134 2017 11 21 58078 0.1312 0.2812 0.24019 2017 11 22 58079 0.1295 0.2807 0.23910 2017 11 23 58080 0.1279 0.2802 0.23802 2017 11 24 58081 0.1262 0.2798 0.23691 2017 11 25 58082 0.1245 0.2794 0.23572 2017 11 26 58083 0.1228 0.2791 0.23443 2017 11 27 58084 0.1211 0.2787 0.23302 2017 11 28 58085 0.1194 0.2784 0.23147 2017 11 29 58086 0.1177 0.2781 0.22978 2017 11 30 58087 0.1160 0.2779 0.22799 2017 12 1 58088 0.1143 0.2776 0.22614 2017 12 2 58089 0.1126 0.2774 0.22433 2017 12 3 58090 0.1109 0.2772 0.22262 2017 12 4 58091 0.1092 0.2771 0.22106 2017 12 5 58092 0.1074 0.2770 0.21965 2017 12 6 58093 0.1057 0.2769 0.21834 2017 12 7 58094 0.1040 0.2768 0.21706 2017 12 8 58095 0.1023 0.2768 0.21576 2017 12 9 58096 0.1005 0.2767 0.21440 2017 12 10 58097 0.0988 0.2768 0.21299 2017 12 11 58098 0.0971 0.2768 0.21155 2017 12 12 58099 0.0954 0.2769 0.21012 2017 12 13 58100 0.0937 0.2770 0.20871 2017 12 14 58101 0.0919 0.2771 0.20737 2017 12 15 58102 0.0902 0.2772 0.20613 2017 12 16 58103 0.0885 0.2774 0.20501 2017 12 17 58104 0.0868 0.2776 0.20399 2017 12 18 58105 0.0851 0.2778 0.20307 2017 12 19 58106 0.0834 0.2781 0.20221 2017 12 20 58107 0.0817 0.2784 0.20137 2017 12 21 58108 0.0800 0.2787 0.20052 2017 12 22 58109 0.0784 0.2790 0.19963 2017 12 23 58110 0.0767 0.2794 0.19868 2017 12 24 58111 0.0750 0.2798 0.19763 2017 12 25 58112 0.0734 0.2802 0.19645 2017 12 26 58113 0.0717 0.2807 0.19518 2017 12 27 58114 0.0701 0.2811 0.19383 2017 12 28 58115 0.0685 0.2816 0.19244 2017 12 29 58116 0.0669 0.2821 0.19103 2017 12 30 58117 0.0653 0.2827 0.18966 2017 12 31 58118 0.0637 0.2833 0.18839 2018 1 1 58119 0.0621 0.2839 0.18723 2018 1 2 58120 0.0605 0.2845 0.18617 2018 1 3 58121 0.0590 0.2851 0.18508 2018 1 4 58122 0.0574 0.2858 0.18389 2018 1 5 58123 0.0559 0.2865 0.18257 2018 1 6 58124 0.0544 0.2872 0.18113 2018 1 7 58125 0.0529 0.2880 0.17966 2018 1 8 58126 0.0514 0.2887 0.17823 2018 1 9 58127 0.0499 0.2895 0.17681 2018 1 10 58128 0.0484 0.2904 0.17548 2018 1 11 58129 0.0470 0.2912 0.17429 2018 1 12 58130 0.0456 0.2921 0.17323 2018 1 13 58131 0.0442 0.2930 0.17230 2018 1 14 58132 0.0428 0.2939 0.17150 2018 1 15 58133 0.0414 0.2948 0.17078 2018 1 16 58134 0.0401 0.2958 0.17013 2018 1 17 58135 0.0387 0.2967 0.16953 2018 1 18 58136 0.0374 0.2977 0.16889 2018 1 19 58137 0.0361 0.2987 0.16813 2018 1 20 58138 0.0348 0.2998 0.16723 2018 1 21 58139 0.0336 0.3008 0.16619 2018 1 22 58140 0.0323 0.3019 0.16505 2018 1 23 58141 0.0311 0.3030 0.16371 2018 1 24 58142 0.0299 0.3042 0.16223 2018 1 25 58143 0.0287 0.3053 0.16073 2018 1 26 58144 0.0276 0.3065 0.15926 2018 1 27 58145 0.0265 0.3076 0.15780 2018 1 28 58146 0.0254 0.3088 0.15643 2018 1 29 58147 0.0243 0.3100 0.15513 2018 1 30 58148 0.0232 0.3113 0.15385 2018 1 31 58149 0.0222 0.3125 0.15254 2018 2 1 58150 0.0212 0.3138 0.15116 2018 2 2 58151 0.0202 0.3151 0.14970 2018 2 3 58152 0.0192 0.3164 0.14815 2018 2 4 58153 0.0183 0.3177 0.14653 2018 2 5 58154 0.0174 0.3190 0.14491 2018 2 6 58155 0.0165 0.3203 0.14338 2018 2 7 58156 0.0156 0.3217 0.14193 2018 2 8 58157 0.0148 0.3231 0.14054 2018 2 9 58158 0.0140 0.3245 0.13925 2018 2 10 58159 0.0132 0.3259 0.13806 2018 2 11 58160 0.0124 0.3273 0.13698 2018 2 12 58161 0.0117 0.3287 0.13596 2018 2 13 58162 0.0110 0.3301 0.13496 2018 2 14 58163 0.0103 0.3316 0.13393 2018 2 15 58164 0.0097 0.3330 0.13278 2018 2 16 58165 0.0090 0.3345 0.13149 2018 2 17 58166 0.0084 0.3360 0.13005 2018 2 18 58167 0.0079 0.3375 0.12850 2018 2 19 58168 0.0073 0.3390 0.12682 2018 2 20 58169 0.0068 0.3405 0.12507 2018 2 21 58170 0.0063 0.3420 0.12333 2018 2 22 58171 0.0059 0.3435 0.12159 2018 2 23 58172 0.0055 0.3450 0.11986 2018 2 24 58173 0.0051 0.3466 0.11814 2018 2 25 58174 0.0047 0.3481 0.11647 2018 2 26 58175 0.0044 0.3497 0.11480 2018 2 27 58176 0.0041 0.3512 0.11313 2018 2 28 58177 0.0038 0.3528 0.11138 2018 3 1 58178 0.0035 0.3544 0.10949 2018 3 2 58179 0.0033 0.3559 0.10747 2018 3 3 58180 0.0031 0.3575 0.10535 2018 3 4 58181 0.0030 0.3591 0.10320 2018 3 5 58182 0.0028 0.3607 0.10110 2018 3 6 58183 0.0027 0.3623 0.09916 2018 3 7 58184 0.0026 0.3638 0.09737 2018 3 8 58185 0.0026 0.3654 0.09572 2018 3 9 58186 0.0026 0.3670 0.09423 2018 3 10 58187 0.0026 0.3686 0.09290 2018 3 11 58188 0.0027 0.3702 0.09169 2018 3 12 58189 0.0027 0.3718 0.09056 2018 3 13 58190 0.0028 0.3734 0.08944 2018 3 14 58191 0.0030 0.3750 0.08829 2018 3 15 58192 0.0031 0.3766 0.08700 2018 3 16 58193 0.0033 0.3781 0.08551 2018 3 17 58194 0.0036 0.3797 0.08383 2018 3 18 58195 0.0038 0.3813 0.08200 2018 3 19 58196 0.0041 0.3829 0.08007 2018 3 20 58197 0.0044 0.3844 0.07814 2018 3 21 58198 0.0047 0.3860 0.07625 2018 3 22 58199 0.0051 0.3876 0.07447 2018 3 23 58200 0.0055 0.3891 0.07279 2018 3 24 58201 0.0059 0.3907 0.07117 2018 3 25 58202 0.0064 0.3922 0.06955 2018 3 26 58203 0.0069 0.3937 0.06791 2018 3 27 58204 0.0074 0.3953 0.06621 2018 3 28 58205 0.0079 0.3968 0.06433 2018 3 29 58206 0.0085 0.3983 0.06223 2018 3 30 58207 0.0091 0.3998 0.06002 2018 3 31 58208 0.0097 0.4013 0.05777 2018 4 1 58209 0.0104 0.4028 0.05553 2018 4 2 58210 0.0111 0.4043 0.05331 2018 4 3 58211 0.0118 0.4057 0.05117 2018 4 4 58212 0.0125 0.4072 0.04914 2018 4 5 58213 0.0133 0.4086 0.04720 2018 4 6 58214 0.0141 0.4100 0.04544 2018 4 7 58215 0.0149 0.4115 0.04383 2018 4 8 58216 0.0157 0.4129 0.04227 2018 4 9 58217 0.0166 0.4143 0.04074 2018 4 10 58218 0.0175 0.4156 0.03921 2018 4 11 58219 0.0184 0.4170 0.03763 2018 4 12 58220 0.0193 0.4183 0.03595 2018 4 13 58221 0.0203 0.4197 0.03419 2018 4 14 58222 0.0213 0.4210 0.03232 2018 4 15 58223 0.0223 0.4223 0.03036 2018 4 16 58224 0.0233 0.4236 0.02838 2018 4 17 58225 0.0244 0.4249 0.02645 2018 4 18 58226 0.0255 0.4261 0.02460 2018 4 19 58227 0.0266 0.4274 0.02288 2018 4 20 58228 0.0277 0.4286 0.02126 2018 4 21 58229 0.0289 0.4298 0.01976 2018 4 22 58230 0.0300 0.4310 0.01827 2018 4 23 58231 0.0312 0.4321 0.01673 2018 4 24 58232 0.0324 0.4333 0.01508 2018 4 25 58233 0.0337 0.4344 0.01328 2018 4 26 58234 0.0349 0.4355 0.01134 2018 4 27 58235 0.0362 0.4366 0.00931 2018 4 28 58236 0.0375 0.4377 0.00725 2018 4 29 58237 0.0388 0.4387 0.00517 2018 4 30 58238 0.0402 0.4398 0.00316 2018 5 1 58239 0.0415 0.4408 0.00126 2018 5 2 58240 0.0429 0.4418 -0.00048 2018 5 3 58241 0.0443 0.4427 -0.00208 2018 5 4 58242 0.0457 0.4437 -0.00359 2018 5 5 58243 0.0471 0.4446 -0.00505 2018 5 6 58244 0.0485 0.4455 -0.00649 2018 5 7 58245 0.0500 0.4464 -0.00793 2018 5 8 58246 0.0515 0.4472 -0.00946 2018 5 9 58247 0.0530 0.4480 -0.01113 2018 5 10 58248 0.0545 0.4488 -0.01291 2018 5 11 58249 0.0560 0.4496 -0.01484 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) 57857 -98.38 0.30 -12.53 0.03 57858 -98.59 0.30 -12.61 0.03 57859 -98.64 0.30 -12.73 0.03 57860 -98.64 0.30 -12.86 0.07 57861 -98.54 0.30 -12.95 0.07 57862 -98.22 0.30 -12.93 0.07 57863 -97.72 0.30 -12.82 0.07 57864 -97.43 0.30 -12.78 0.07 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57857 -0.126 0.119 -0.012 0.030 57858 -0.152 0.119 0.003 0.030 57859 -0.152 0.119 0.014 0.030 57860 -0.151 0.119 0.032 0.070 57861 -0.146 0.119 0.051 0.070 57862 -0.142 0.119 0.075 0.070 57863 -0.140 0.119 0.095 0.070 57864 -0.165 0.119 0.065 0.070 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).