********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 8 June 2017 Vol. XXX No. 023 ______________________________________________________________________ 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 = +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 6 2 57906 0.09774 .00009 0.45787 .00009 0.379345 0.000021 17 6 3 57907 0.09950 .00009 0.45825 .00009 0.377968 0.000023 17 6 4 57908 0.10115 .00009 0.45853 .00009 0.376658 0.000025 17 6 5 57909 0.10263 .00009 0.45855 .00009 0.375447 0.000022 17 6 6 57910 0.10397 .00009 0.45846 .00009 0.374347 0.000023 17 6 7 57911 0.10536 .00009 0.45832 .00009 0.373383 0.000020 17 6 8 57912 0.10688 .00009 0.45810 .00009 0.372574 0.000017 _______________________________________________________________________ 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 = 0.1164 + 0.0246 cos A + 0.1108 sin A - 0.0348 cos C - 0.0133 sin C y = 0.3608 + 0.1036 cos A - 0.0158 sin A - 0.0133 cos C + 0.0348 sin C UT1-UTC = 0.3956 - 0.00115 (MJD - 57920) - (UT2-UT1) where A = 2*pi*(MJD-57912)/365.25 and C = 2*pi*(MJD-57912)/435. TAI-UTC(MJD 57913) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57912)**0.80 S t = 0.00025 (MJD-57912)**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 6 9 57913 0.1085 0.4579 0.37192 2017 6 10 57914 0.1102 0.4578 0.37139 2017 6 11 57915 0.1119 0.4577 0.37094 2017 6 12 57916 0.1136 0.4576 0.37054 2017 6 13 57917 0.1152 0.4576 0.37016 2017 6 14 57918 0.1167 0.4575 0.36975 2017 6 15 57919 0.1183 0.4573 0.36927 2017 6 16 57920 0.1200 0.4572 0.36868 2017 6 17 57921 0.1216 0.4570 0.36796 2017 6 18 57922 0.1233 0.4568 0.36708 2017 6 19 57923 0.1249 0.4566 0.36607 2017 6 20 57924 0.1266 0.4564 0.36500 2017 6 21 57925 0.1282 0.4561 0.36394 2017 6 22 57926 0.1298 0.4559 0.36295 2017 6 23 57927 0.1314 0.4556 0.36206 2017 6 24 57928 0.1330 0.4553 0.36127 2017 6 25 57929 0.1346 0.4550 0.36055 2017 6 26 57930 0.1361 0.4546 0.35986 2017 6 27 57931 0.1376 0.4542 0.35914 2017 6 28 57932 0.1391 0.4537 0.35836 2017 6 29 57933 0.1407 0.4533 0.35755 2017 6 30 57934 0.1422 0.4528 0.35674 2017 7 1 57935 0.1437 0.4523 0.35596 2017 7 2 57936 0.1452 0.4518 0.35525 2017 7 3 57937 0.1467 0.4512 0.35464 2017 7 4 57938 0.1482 0.4507 0.35414 2017 7 5 57939 0.1496 0.4501 0.35376 2017 7 6 57940 0.1511 0.4495 0.35351 2017 7 7 57941 0.1525 0.4488 0.35335 2017 7 8 57942 0.1539 0.4482 0.35326 2017 7 9 57943 0.1553 0.4475 0.35322 2017 7 10 57944 0.1567 0.4468 0.35316 2017 7 11 57945 0.1581 0.4461 0.35305 2017 7 12 57946 0.1595 0.4453 0.35283 2017 7 13 57947 0.1609 0.4445 0.35248 2017 7 14 57948 0.1622 0.4438 0.35199 2017 7 15 57949 0.1635 0.4429 0.35139 2017 7 16 57950 0.1648 0.4421 0.35068 2017 7 17 57951 0.1661 0.4413 0.34994 2017 7 18 57952 0.1674 0.4404 0.34921 2017 7 19 57953 0.1686 0.4395 0.34857 2017 7 20 57954 0.1698 0.4386 0.34804 2017 7 21 57955 0.1710 0.4376 0.34764 2017 7 22 57956 0.1722 0.4367 0.34732 2017 7 23 57957 0.1734 0.4357 0.34702 2017 7 24 57958 0.1746 0.4347 0.34668 2017 7 25 57959 0.1757 0.4337 0.34626 2017 7 26 57960 0.1768 0.4327 0.34576 2017 7 27 57961 0.1779 0.4316 0.34521 2017 7 28 57962 0.1790 0.4305 0.34467 2017 7 29 57963 0.1800 0.4294 0.34417 2017 7 30 57964 0.1811 0.4283 0.34376 2017 7 31 57965 0.1821 0.4272 0.34345 2017 8 1 57966 0.1831 0.4261 0.34325 2017 8 2 57967 0.1840 0.4249 0.34317 2017 8 3 57968 0.1850 0.4238 0.34317 2017 8 4 57969 0.1859 0.4226 0.34323 2017 8 5 57970 0.1868 0.4214 0.34332 2017 8 6 57971 0.1876 0.4202 0.34339 2017 8 7 57972 0.1885 0.4189 0.34340 2017 8 8 57973 0.1893 0.4177 0.34330 2017 8 9 57974 0.1901 0.4164 0.34308 2017 8 10 57975 0.1909 0.4151 0.34270 2017 8 11 57976 0.1916 0.4139 0.34220 2017 8 12 57977 0.1923 0.4126 0.34160 2017 8 13 57978 0.1930 0.4112 0.34094 2017 8 14 57979 0.1937 0.4099 0.34030 2017 8 15 57980 0.1944 0.4086 0.33971 2017 8 16 57981 0.1950 0.4072 0.33919 2017 8 17 57982 0.1956 0.4059 0.33876 2017 8 18 57983 0.1961 0.4045 0.33839 2017 8 19 57984 0.1967 0.4031 0.33802 2017 8 20 57985 0.1972 0.4017 0.33760 2017 8 21 57986 0.1977 0.4003 0.33707 2017 8 22 57987 0.1981 0.3989 0.33643 2017 8 23 57988 0.1986 0.3975 0.33569 2017 8 24 57989 0.1990 0.3961 0.33489 2017 8 25 57990 0.1994 0.3947 0.33410 2017 8 26 57991 0.1997 0.3932 0.33336 2017 8 27 57992 0.2000 0.3918 0.33270 2017 8 28 57993 0.2003 0.3903 0.33214 2017 8 29 57994 0.2006 0.3889 0.33168 2017 8 30 57995 0.2008 0.3874 0.33131 2017 8 31 57996 0.2011 0.3859 0.33100 2017 9 1 57997 0.2012 0.3845 0.33071 2017 9 2 57998 0.2014 0.3830 0.33039 2017 9 3 57999 0.2015 0.3815 0.33001 2017 9 4 58000 0.2016 0.3800 0.32951 2017 9 5 58001 0.2017 0.3785 0.32886 2017 9 6 58002 0.2017 0.3770 0.32804 2017 9 7 58003 0.2017 0.3756 0.32705 2017 9 8 58004 0.2017 0.3741 0.32592 2017 9 9 58005 0.2017 0.3726 0.32473 2017 9 10 58006 0.2016 0.3711 0.32353 2017 9 11 58007 0.2015 0.3696 0.32239 2017 9 12 58008 0.2014 0.3681 0.32134 2017 9 13 58009 0.2012 0.3666 0.32040 2017 9 14 58010 0.2011 0.3651 0.31953 2017 9 15 58011 0.2008 0.3636 0.31869 2017 9 16 58012 0.2006 0.3621 0.31782 2017 9 17 58013 0.2003 0.3606 0.31685 2017 9 18 58014 0.2000 0.3592 0.31576 2017 9 19 58015 0.1997 0.3577 0.31455 2017 9 20 58016 0.1994 0.3562 0.31324 2017 9 21 58017 0.1990 0.3547 0.31191 2017 9 22 58018 0.1986 0.3533 0.31059 2017 9 23 58019 0.1981 0.3518 0.30933 2017 9 24 58020 0.1977 0.3503 0.30817 2017 9 25 58021 0.1972 0.3489 0.30709 2017 9 26 58022 0.1967 0.3475 0.30611 2017 9 27 58023 0.1961 0.3460 0.30521 2017 9 28 58024 0.1956 0.3446 0.30436 2017 9 29 58025 0.1950 0.3432 0.30350 2017 9 30 58026 0.1943 0.3417 0.30260 2017 10 1 58027 0.1937 0.3403 0.30161 2017 10 2 58028 0.1930 0.3389 0.30049 2017 10 3 58029 0.1923 0.3376 0.29921 2017 10 4 58030 0.1916 0.3362 0.29775 2017 10 5 58031 0.1908 0.3348 0.29614 2017 10 6 58032 0.1901 0.3335 0.29443 2017 10 7 58033 0.1893 0.3321 0.29268 2017 10 8 58034 0.1884 0.3308 0.29098 2017 10 9 58035 0.1876 0.3295 0.28940 2017 10 10 58036 0.1867 0.3281 0.28795 2017 10 11 58037 0.1858 0.3269 0.28661 2017 10 12 58038 0.1849 0.3256 0.28533 2017 10 13 58039 0.1839 0.3243 0.28406 2017 10 14 58040 0.1830 0.3230 0.28273 2017 10 15 58041 0.1820 0.3218 0.28131 2017 10 16 58042 0.1810 0.3206 0.27978 2017 10 17 58043 0.1799 0.3194 0.27816 2017 10 18 58044 0.1789 0.3182 0.27650 2017 10 19 58045 0.1778 0.3170 0.27485 2017 10 20 58046 0.1767 0.3158 0.27325 2017 10 21 58047 0.1755 0.3147 0.27175 2017 10 22 58048 0.1744 0.3135 0.27037 2017 10 23 58049 0.1732 0.3124 0.26910 2017 10 24 58050 0.1720 0.3113 0.26793 2017 10 25 58051 0.1708 0.3102 0.26684 2017 10 26 58052 0.1696 0.3092 0.26579 2017 10 27 58053 0.1684 0.3081 0.26472 2017 10 28 58054 0.1671 0.3071 0.26360 2017 10 29 58055 0.1658 0.3061 0.26237 2017 10 30 58056 0.1645 0.3051 0.26101 2017 10 31 58057 0.1632 0.3041 0.25948 2017 11 1 58058 0.1619 0.3032 0.25780 2017 11 2 58059 0.1605 0.3023 0.25599 2017 11 3 58060 0.1591 0.3013 0.25410 2017 11 4 58061 0.1578 0.3005 0.25222 2017 11 5 58062 0.1564 0.2996 0.25043 2017 11 6 58063 0.1549 0.2987 0.24878 2017 11 7 58064 0.1535 0.2979 0.24727 2017 11 8 58065 0.1521 0.2971 0.24587 2017 11 9 58066 0.1506 0.2963 0.24451 2017 11 10 58067 0.1491 0.2956 0.24313 2017 11 11 58068 0.1476 0.2948 0.24168 2017 11 12 58069 0.1462 0.2941 0.24016 2017 11 13 58070 0.1446 0.2934 0.23856 2017 11 14 58071 0.1431 0.2928 0.23693 2017 11 15 58072 0.1416 0.2921 0.23531 2017 11 16 58073 0.1400 0.2915 0.23375 2017 11 17 58074 0.1385 0.2909 0.23227 2017 11 18 58075 0.1369 0.2903 0.23092 2017 11 19 58076 0.1354 0.2898 0.22969 2017 11 20 58077 0.1338 0.2893 0.22858 2017 11 21 58078 0.1322 0.2888 0.22756 2017 11 22 58079 0.1306 0.2883 0.22661 2017 11 23 58080 0.1290 0.2878 0.22567 2017 11 24 58081 0.1274 0.2874 0.22471 2017 11 25 58082 0.1257 0.2870 0.22368 2017 11 26 58083 0.1241 0.2866 0.22254 2017 11 27 58084 0.1225 0.2863 0.22127 2017 11 28 58085 0.1208 0.2860 0.21985 2017 11 29 58086 0.1192 0.2857 0.21830 2017 11 30 58087 0.1175 0.2854 0.21665 2017 12 1 58088 0.1159 0.2851 0.21496 2017 12 2 58089 0.1142 0.2849 0.21332 2017 12 3 58090 0.1126 0.2847 0.21179 2017 12 4 58091 0.1109 0.2845 0.21041 2017 12 5 58092 0.1093 0.2844 0.20915 2017 12 6 58093 0.1076 0.2843 0.20797 2017 12 7 58094 0.1059 0.2842 0.20681 2017 12 8 58095 0.1043 0.2841 0.20559 2017 12 9 58096 0.1026 0.2841 0.20431 2017 12 10 58097 0.1010 0.2841 0.20297 2017 12 11 58098 0.0993 0.2841 0.20161 2017 12 12 58099 0.0976 0.2841 0.20026 2017 12 13 58100 0.0960 0.2842 0.19898 2017 12 14 58101 0.0943 0.2843 0.19778 2017 12 15 58102 0.0927 0.2844 0.19669 2017 12 16 58103 0.0910 0.2845 0.19571 2017 12 17 58104 0.0894 0.2847 0.19483 2017 12 18 58105 0.0877 0.2849 0.19403 2017 12 19 58106 0.0861 0.2851 0.19328 2017 12 20 58107 0.0845 0.2853 0.19254 2017 12 21 58108 0.0828 0.2856 0.19178 2017 12 22 58109 0.0812 0.2859 0.19095 2017 12 23 58110 0.0796 0.2862 0.19002 2017 12 24 58111 0.0780 0.2866 0.18895 2017 12 25 58112 0.0764 0.2869 0.18775 2017 12 26 58113 0.0748 0.2873 0.18640 2017 12 27 58114 0.0733 0.2877 0.18492 2017 12 28 58115 0.0717 0.2882 0.18336 2017 12 29 58116 0.0701 0.2887 0.18178 2017 12 30 58117 0.0686 0.2892 0.18023 2017 12 31 58118 0.0670 0.2897 0.17876 2018 1 1 58119 0.0655 0.2902 0.17740 2018 1 2 58120 0.0640 0.2908 0.17610 2018 1 3 58121 0.0625 0.2914 0.17480 2018 1 4 58122 0.0610 0.2920 0.17347 2018 1 5 58123 0.0595 0.2926 0.17205 2018 1 6 58124 0.0581 0.2933 0.17056 2018 1 7 58125 0.0566 0.2940 0.16905 2018 1 8 58126 0.0552 0.2947 0.16756 2018 1 9 58127 0.0538 0.2954 0.16616 2018 1 10 58128 0.0524 0.2962 0.16490 2018 1 11 58129 0.0510 0.2970 0.16379 2018 1 12 58130 0.0496 0.2978 0.16283 2018 1 13 58131 0.0482 0.2986 0.16202 2018 1 14 58132 0.0469 0.2995 0.16129 2018 1 15 58133 0.0456 0.3003 0.16059 2018 1 16 58134 0.0443 0.3012 0.15984 2018 1 17 58135 0.0430 0.3021 0.15903 2018 1 18 58136 0.0417 0.3031 0.15813 2018 1 19 58137 0.0404 0.3040 0.15709 2018 1 20 58138 0.0392 0.3050 0.15593 2018 1 21 58139 0.0380 0.3060 0.15463 2018 1 22 58140 0.0368 0.3070 0.15318 2018 1 23 58141 0.0356 0.3080 0.15160 2018 1 24 58142 0.0345 0.3091 0.14996 2018 1 25 58143 0.0333 0.3101 0.14835 2018 1 26 58144 0.0322 0.3112 0.14683 2018 1 27 58145 0.0311 0.3123 0.14540 2018 1 28 58146 0.0301 0.3135 0.14408 2018 1 29 58147 0.0290 0.3146 0.14285 2018 1 30 58148 0.0280 0.3158 0.14166 2018 1 31 58149 0.0270 0.3169 0.14042 2018 2 1 58150 0.0260 0.3181 0.13909 2018 2 2 58151 0.0251 0.3193 0.13768 2018 2 3 58152 0.0241 0.3206 0.13620 2018 2 4 58153 0.0232 0.3218 0.13467 2018 2 5 58154 0.0224 0.3231 0.13312 2018 2 6 58155 0.0215 0.3243 0.13164 2018 2 7 58156 0.0207 0.3256 0.13022 2018 2 8 58157 0.0199 0.3269 0.12889 2018 2 9 58158 0.0191 0.3282 0.12771 2018 2 10 58159 0.0183 0.3295 0.12665 2018 2 11 58160 0.0176 0.3309 0.12563 2018 2 12 58161 0.0169 0.3322 0.12465 2018 2 13 58162 0.0162 0.3336 0.12367 2018 2 14 58163 0.0155 0.3350 0.12261 2018 2 15 58164 0.0149 0.3364 0.12147 2018 2 16 58165 0.0143 0.3378 0.12022 2018 2 17 58166 0.0137 0.3392 0.11887 2018 2 18 58167 0.0132 0.3406 0.11739 2018 2 19 58168 0.0127 0.3420 0.11581 2018 2 20 58169 0.0122 0.3434 0.11419 2018 2 21 58170 0.0117 0.3449 0.11259 2018 2 22 58171 0.0113 0.3463 0.11104 2018 2 23 58172 0.0109 0.3478 0.10954 2018 2 24 58173 0.0105 0.3493 0.10812 2018 2 25 58174 0.0101 0.3507 0.10677 2018 2 26 58175 0.0098 0.3522 0.10545 2018 2 27 58176 0.0095 0.3537 0.10412 2018 2 28 58177 0.0092 0.3552 0.10265 2018 3 1 58178 0.0090 0.3567 0.10098 2018 3 2 58179 0.0088 0.3582 0.09914 2018 3 3 58180 0.0086 0.3597 0.09717 2018 3 4 58181 0.0084 0.3612 0.09521 2018 3 5 58182 0.0083 0.3627 0.09332 2018 3 6 58183 0.0082 0.3642 0.09151 2018 3 7 58184 0.0081 0.3658 0.08982 2018 3 8 58185 0.0081 0.3673 0.08831 2018 3 9 58186 0.0081 0.3688 0.08692 2018 3 10 58187 0.0081 0.3703 0.08565 2018 3 11 58188 0.0081 0.3719 0.08447 2018 3 12 58189 0.0082 0.3734 0.08331 2018 3 13 58190 0.0083 0.3749 0.08217 2018 3 14 58191 0.0084 0.3764 0.08099 2018 3 15 58192 0.0086 0.3780 0.07972 2018 3 16 58193 0.0088 0.3795 0.07829 2018 3 17 58194 0.0090 0.3810 0.07668 2018 3 18 58195 0.0092 0.3825 0.07494 2018 3 19 58196 0.0095 0.3840 0.07314 2018 3 20 58197 0.0098 0.3856 0.07123 2018 3 21 58198 0.0101 0.3871 0.06928 2018 3 22 58199 0.0105 0.3886 0.06742 2018 3 23 58200 0.0108 0.3901 0.06567 2018 3 24 58201 0.0113 0.3916 0.06397 2018 3 25 58202 0.0117 0.3931 0.06233 2018 3 26 58203 0.0122 0.3945 0.06069 2018 3 27 58204 0.0127 0.3960 0.05898 2018 3 28 58205 0.0132 0.3975 0.05718 2018 3 29 58206 0.0137 0.3990 0.05528 2018 3 30 58207 0.0143 0.4004 0.05332 2018 3 31 58208 0.0149 0.4019 0.05130 2018 4 1 58209 0.0155 0.4033 0.04928 2018 4 2 58210 0.0162 0.4047 0.04731 2018 4 3 58211 0.0169 0.4061 0.04549 2018 4 4 58212 0.0176 0.4076 0.04377 2018 4 5 58213 0.0183 0.4090 0.04214 2018 4 6 58214 0.0191 0.4103 0.04061 2018 4 7 58215 0.0198 0.4117 0.03917 2018 4 8 58216 0.0206 0.4131 0.03781 2018 4 9 58217 0.0215 0.4145 0.03646 2018 4 10 58218 0.0223 0.4158 0.03509 2018 4 11 58219 0.0232 0.4171 0.03364 2018 4 12 58220 0.0241 0.4184 0.03206 2018 4 13 58221 0.0250 0.4197 0.03030 2018 4 14 58222 0.0260 0.4210 0.02842 2018 4 15 58223 0.0270 0.4223 0.02645 2018 4 16 58224 0.0280 0.4236 0.02442 2018 4 17 58225 0.0290 0.4248 0.02242 2018 4 18 58226 0.0300 0.4261 0.02054 2018 4 19 58227 0.0311 0.4273 0.01875 2018 4 20 58228 0.0322 0.4285 0.01704 2018 4 21 58229 0.0333 0.4297 0.01536 2018 4 22 58230 0.0344 0.4308 0.01368 2018 4 23 58231 0.0356 0.4320 0.01197 2018 4 24 58232 0.0368 0.4331 0.01019 2018 4 25 58233 0.0379 0.4342 0.00833 2018 4 26 58234 0.0392 0.4353 0.00638 2018 4 27 58235 0.0404 0.4364 0.00436 2018 4 28 58236 0.0416 0.4375 0.00232 2018 4 29 58237 0.0429 0.4385 0.00035 2018 4 30 58238 0.0442 0.4395 -0.00149 2018 5 1 58239 0.0455 0.4405 -0.00314 2018 5 2 58240 0.0468 0.4415 -0.00460 2018 5 3 58241 0.0481 0.4425 -0.00591 2018 5 4 58242 0.0495 0.4434 -0.00708 2018 5 5 58243 0.0509 0.4443 -0.00811 2018 5 6 58244 0.0523 0.4452 -0.00905 2018 5 7 58245 0.0537 0.4461 -0.00994 2018 5 8 58246 0.0551 0.4470 -0.01085 2018 5 9 58247 0.0565 0.4478 -0.01182 2018 5 10 58248 0.0579 0.4486 -0.01292 2018 5 11 58249 0.0594 0.4494 -0.01421 2018 5 12 58250 0.0609 0.4502 -0.01566 2018 5 13 58251 0.0624 0.4509 -0.01721 2018 5 14 58252 0.0639 0.4516 -0.01877 2018 5 15 58253 0.0654 0.4523 -0.02025 2018 5 16 58254 0.0669 0.4530 -0.02161 2018 5 17 58255 0.0684 0.4536 -0.02280 2018 5 18 58256 0.0700 0.4543 -0.02386 2018 5 19 58257 0.0715 0.4549 -0.02488 2018 5 20 58258 0.0731 0.4555 -0.02597 2018 5 21 58259 0.0746 0.4560 -0.02713 2018 5 22 58260 0.0762 0.4565 -0.02837 2018 5 23 58261 0.0778 0.4570 -0.02977 2018 5 24 58262 0.0794 0.4575 -0.03130 2018 5 25 58263 0.0810 0.4580 -0.03283 2018 5 26 58264 0.0826 0.4584 -0.03428 2018 5 27 58265 0.0842 0.4588 -0.03563 2018 5 28 58266 0.0858 0.4592 -0.03689 2018 5 29 58267 0.0875 0.4596 -0.03804 2018 5 30 58268 0.0891 0.4599 -0.03909 2018 5 31 58269 0.0907 0.4602 -0.04006 2018 6 1 58270 0.0924 0.4605 -0.04088 2018 6 2 58271 0.0940 0.4607 -0.04159 2018 6 3 58272 0.0957 0.4609 -0.04229 2018 6 4 58273 0.0973 0.4612 -0.04301 2018 6 5 58274 0.0990 0.4613 -0.04375 2018 6 6 58275 0.1006 0.4615 -0.04457 2018 6 7 58276 0.1023 0.4616 -0.04547 2018 6 8 58277 0.1039 0.4617 -0.04643 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) 57890 -99.36 0.30 -13.25 0.05 57891 -98.90 0.30 -13.13 0.05 57892 -98.43 0.30 -12.90 0.05 57893 -98.40 0.30 -12.78 0.04 57894 -98.79 0.30 -12.80 0.03 57895 -99.20 0.30 -12.79 0.03 57896 -99.39 0.30 -12.67 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57890 -0.193 0.119 0.207 0.050 57891 -0.186 0.119 0.203 0.050 57892 -0.186 0.119 0.199 0.050 57893 -0.195 0.119 0.153 0.040 57894 -0.192 0.119 0.108 0.030 57895 -0.178 0.119 0.107 0.030 57896 -0.160 0.119 0.114 0.150 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).