********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 1 June 2017 Vol. XXX No. 022 ______________________________________________________________________ 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 5 26 57899 0.08391 .00009 0.45600 .00009 0.387828 0.000015 17 5 27 57900 0.08555 .00009 0.45629 .00009 0.386532 0.000015 17 5 28 57901 0.08754 .00009 0.45643 .00009 0.385422 0.000015 17 5 29 57902 0.08985 .00009 0.45665 .00009 0.384367 0.000012 17 5 30 57903 0.09207 .00009 0.45708 .00009 0.383236 0.000011 17 5 31 57904 0.09403 .00009 0.45740 .00009 0.382003 0.000010 17 6 1 57905 0.09589 .00009 0.45755 .00009 0.380696 0.000007 IERS Final Values MJD x y UT1-UTC " " s 17 4 2 57845 0.0057 0.3791 0.46891 17 4 3 57846 0.0062 0.3798 0.46750 17 4 4 57847 0.0072 0.3808 0.46615 17 4 5 57848 0.0084 0.3825 0.46480 17 4 6 57849 0.0096 0.3846 0.46338 17 4 7 57850 0.0104 0.3866 0.46190 17 4 8 57851 0.0106 0.3884 0.46034 17 4 9 57852 0.0106 0.3901 0.45870 17 4 10 57853 0.0110 0.3918 0.45706 17 4 11 57854 0.0116 0.3936 0.45542 17 4 12 57855 0.0124 0.3952 0.45382 17 4 13 57856 0.0142 0.3968 0.45226 17 4 14 57857 0.0163 0.3988 0.45072 17 4 15 57858 0.0182 0.4011 0.44922 17 4 16 57859 0.0197 0.4035 0.44774 17 4 17 57860 0.0212 0.4058 0.44629 17 4 18 57861 0.0227 0.4077 0.44485 17 4 19 57862 0.0239 0.4098 0.44340 17 4 20 57863 0.0247 0.4114 0.44193 17 4 21 57864 0.0261 0.4127 0.44037 17 4 22 57865 0.0279 0.4150 0.43863 17 4 23 57866 0.0292 0.4175 0.43672 17 4 24 57867 0.0298 0.4198 0.43463 17 4 25 57868 0.0305 0.4216 0.43246 17 4 26 57869 0.0315 0.4232 0.43027 17 4 27 57870 0.0322 0.4246 0.42818 17 4 28 57871 0.0332 0.4259 0.42627 17 4 29 57872 0.0346 0.4275 0.42456 17 4 30 57873 0.0363 0.4295 0.42301 17 5 1 57874 0.0379 0.4314 0.42160 _______________________________________________________________________ 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 = 0.1203 + 0.0112 cos A + 0.1086 sin A - 0.0357 cos C - 0.0133 sin C y = 0.3628 + 0.1012 cos A - 0.0037 sin A - 0.0133 cos C + 0.0357 sin C UT1-UTC = 0.4052 - 0.00115 (MJD - 57913) - (UT2-UT1) where A = 2*pi*(MJD-57905)/365.25 and C = 2*pi*(MJD-57905)/435. TAI-UTC(MJD 57906) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57905)**0.80 S t = 0.00025 (MJD-57905)**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 2 57906 0.0977 0.4577 0.37935 2017 6 3 57907 0.0995 0.4578 0.37800 2017 6 4 57908 0.1014 0.4579 0.37671 2017 6 5 57909 0.1032 0.4580 0.37552 2017 6 6 57910 0.1050 0.4581 0.37446 2017 6 7 57911 0.1068 0.4582 0.37356 2017 6 8 57912 0.1085 0.4583 0.37281 2017 6 9 57913 0.1103 0.4584 0.37220 2017 6 10 57914 0.1121 0.4584 0.37167 2017 6 11 57915 0.1138 0.4584 0.37117 2017 6 12 57916 0.1155 0.4584 0.37064 2017 6 13 57917 0.1172 0.4583 0.37005 2017 6 14 57918 0.1188 0.4582 0.36940 2017 6 15 57919 0.1205 0.4581 0.36866 2017 6 16 57920 0.1221 0.4579 0.36783 2017 6 17 57921 0.1237 0.4578 0.36688 2017 6 18 57922 0.1254 0.4575 0.36582 2017 6 19 57923 0.1270 0.4573 0.36470 2017 6 20 57924 0.1287 0.4569 0.36357 2017 6 21 57925 0.1304 0.4566 0.36250 2017 6 22 57926 0.1320 0.4563 0.36154 2017 6 23 57927 0.1337 0.4559 0.36072 2017 6 24 57928 0.1353 0.4555 0.36003 2017 6 25 57929 0.1369 0.4551 0.35943 2017 6 26 57930 0.1385 0.4546 0.35885 2017 6 27 57931 0.1401 0.4541 0.35823 2017 6 28 57932 0.1417 0.4537 0.35756 2017 6 29 57933 0.1433 0.4531 0.35687 2017 6 30 57934 0.1448 0.4526 0.35617 2017 7 1 57935 0.1464 0.4521 0.35549 2017 7 2 57936 0.1479 0.4515 0.35488 2017 7 3 57937 0.1494 0.4509 0.35435 2017 7 4 57938 0.1509 0.4502 0.35393 2017 7 5 57939 0.1524 0.4496 0.35362 2017 7 6 57940 0.1538 0.4489 0.35341 2017 7 7 57941 0.1552 0.4482 0.35329 2017 7 8 57942 0.1567 0.4475 0.35324 2017 7 9 57943 0.1581 0.4468 0.35323 2017 7 10 57944 0.1595 0.4460 0.35322 2017 7 11 57945 0.1608 0.4452 0.35316 2017 7 12 57946 0.1622 0.4444 0.35301 2017 7 13 57947 0.1636 0.4435 0.35275 2017 7 14 57948 0.1649 0.4427 0.35237 2017 7 15 57949 0.1662 0.4418 0.35188 2017 7 16 57950 0.1675 0.4409 0.35131 2017 7 17 57951 0.1688 0.4399 0.35071 2017 7 18 57952 0.1700 0.4390 0.35013 2017 7 19 57953 0.1713 0.4380 0.34963 2017 7 20 57954 0.1725 0.4370 0.34924 2017 7 21 57955 0.1737 0.4360 0.34896 2017 7 22 57956 0.1749 0.4350 0.34876 2017 7 23 57957 0.1761 0.4340 0.34857 2017 7 24 57958 0.1772 0.4329 0.34833 2017 7 25 57959 0.1783 0.4318 0.34800 2017 7 26 57960 0.1794 0.4307 0.34759 2017 7 27 57961 0.1805 0.4296 0.34713 2017 7 28 57962 0.1815 0.4285 0.34667 2017 7 29 57963 0.1826 0.4273 0.34626 2017 7 30 57964 0.1836 0.4261 0.34594 2017 7 31 57965 0.1845 0.4250 0.34572 2017 8 1 57966 0.1855 0.4237 0.34561 2017 8 2 57967 0.1864 0.4225 0.34561 2017 8 3 57968 0.1873 0.4213 0.34569 2017 8 4 57969 0.1882 0.4200 0.34583 2017 8 5 57970 0.1891 0.4188 0.34598 2017 8 6 57971 0.1899 0.4175 0.34609 2017 8 7 57972 0.1907 0.4162 0.34613 2017 8 8 57973 0.1915 0.4149 0.34605 2017 8 9 57974 0.1923 0.4136 0.34583 2017 8 10 57975 0.1930 0.4122 0.34546 2017 8 11 57976 0.1937 0.4109 0.34494 2017 8 12 57977 0.1944 0.4095 0.34432 2017 8 13 57978 0.1951 0.4082 0.34366 2017 8 14 57979 0.1957 0.4068 0.34300 2017 8 15 57980 0.1963 0.4054 0.34240 2017 8 16 57981 0.1969 0.4040 0.34189 2017 8 17 57982 0.1975 0.4026 0.34147 2017 8 18 57983 0.1980 0.4011 0.34111 2017 8 19 57984 0.1985 0.3997 0.34075 2017 8 20 57985 0.1990 0.3983 0.34034 2017 8 21 57986 0.1994 0.3968 0.33982 2017 8 22 57987 0.1998 0.3954 0.33918 2017 8 23 57988 0.2002 0.3939 0.33843 2017 8 24 57989 0.2006 0.3924 0.33762 2017 8 25 57990 0.2009 0.3909 0.33681 2017 8 26 57991 0.2012 0.3895 0.33605 2017 8 27 57992 0.2015 0.3880 0.33537 2017 8 28 57993 0.2017 0.3865 0.33479 2017 8 29 57994 0.2019 0.3850 0.33431 2017 8 30 57995 0.2021 0.3835 0.33392 2017 8 31 57996 0.2023 0.3819 0.33358 2017 9 1 57997 0.2024 0.3804 0.33327 2017 9 2 57998 0.2025 0.3789 0.33294 2017 9 3 57999 0.2026 0.3774 0.33254 2017 9 4 58000 0.2027 0.3759 0.33203 2017 9 5 58001 0.2027 0.3743 0.33136 2017 9 6 58002 0.2027 0.3728 0.33053 2017 9 7 58003 0.2026 0.3713 0.32954 2017 9 8 58004 0.2026 0.3698 0.32841 2017 9 9 58005 0.2025 0.3682 0.32720 2017 9 10 58006 0.2023 0.3667 0.32599 2017 9 11 58007 0.2022 0.3652 0.32483 2017 9 12 58008 0.2020 0.3637 0.32377 2017 9 13 58009 0.2018 0.3621 0.32280 2017 9 14 58010 0.2015 0.3606 0.32191 2017 9 15 58011 0.2013 0.3591 0.32104 2017 9 16 58012 0.2010 0.3576 0.32013 2017 9 17 58013 0.2006 0.3561 0.31913 2017 9 18 58014 0.2003 0.3546 0.31799 2017 9 19 58015 0.1999 0.3531 0.31674 2017 9 20 58016 0.1995 0.3516 0.31540 2017 9 21 58017 0.1991 0.3501 0.31403 2017 9 22 58018 0.1986 0.3486 0.31268 2017 9 23 58019 0.1981 0.3471 0.31141 2017 9 24 58020 0.1976 0.3456 0.31023 2017 9 25 58021 0.1970 0.3442 0.30916 2017 9 26 58022 0.1965 0.3427 0.30820 2017 9 27 58023 0.1959 0.3412 0.30732 2017 9 28 58024 0.1952 0.3398 0.30648 2017 9 29 58025 0.1946 0.3384 0.30565 2017 9 30 58026 0.1939 0.3369 0.30476 2017 10 1 58027 0.1932 0.3355 0.30379 2017 10 2 58028 0.1925 0.3341 0.30268 2017 10 3 58029 0.1917 0.3327 0.30141 2017 10 4 58030 0.1909 0.3313 0.29997 2017 10 5 58031 0.1901 0.3300 0.29837 2017 10 6 58032 0.1893 0.3286 0.29667 2017 10 7 58033 0.1884 0.3273 0.29493 2017 10 8 58034 0.1875 0.3259 0.29324 2017 10 9 58035 0.1866 0.3246 0.29166 2017 10 10 58036 0.1857 0.3233 0.29021 2017 10 11 58037 0.1847 0.3220 0.28888 2017 10 12 58038 0.1837 0.3207 0.28761 2017 10 13 58039 0.1827 0.3195 0.28635 2017 10 14 58040 0.1817 0.3182 0.28503 2017 10 15 58041 0.1806 0.3170 0.28362 2017 10 16 58042 0.1796 0.3157 0.28210 2017 10 17 58043 0.1785 0.3145 0.28050 2017 10 18 58044 0.1773 0.3134 0.27885 2017 10 19 58045 0.1762 0.3122 0.27720 2017 10 20 58046 0.1750 0.3110 0.27562 2017 10 21 58047 0.1739 0.3099 0.27413 2017 10 22 58048 0.1727 0.3088 0.27275 2017 10 23 58049 0.1714 0.3077 0.27149 2017 10 24 58050 0.1702 0.3066 0.27033 2017 10 25 58051 0.1689 0.3055 0.26925 2017 10 26 58052 0.1676 0.3045 0.26820 2017 10 27 58053 0.1663 0.3034 0.26714 2017 10 28 58054 0.1650 0.3024 0.26602 2017 10 29 58055 0.1637 0.3015 0.26479 2017 10 30 58056 0.1623 0.3005 0.26343 2017 10 31 58057 0.1610 0.2995 0.26191 2017 11 1 58058 0.1596 0.2986 0.26023 2017 11 2 58059 0.1582 0.2977 0.25842 2017 11 3 58060 0.1567 0.2968 0.25654 2017 11 4 58061 0.1553 0.2960 0.25466 2017 11 5 58062 0.1539 0.2951 0.25288 2017 11 6 58063 0.1524 0.2943 0.25124 2017 11 7 58064 0.1509 0.2935 0.24974 2017 11 8 58065 0.1494 0.2927 0.24835 2017 11 9 58066 0.1479 0.2920 0.24700 2017 11 10 58067 0.1464 0.2913 0.24563 2017 11 11 58068 0.1449 0.2906 0.24420 2017 11 12 58069 0.1433 0.2899 0.24269 2017 11 13 58070 0.1418 0.2892 0.24111 2017 11 14 58071 0.1402 0.2886 0.23949 2017 11 15 58072 0.1386 0.2880 0.23788 2017 11 16 58073 0.1370 0.2874 0.23633 2017 11 17 58074 0.1354 0.2869 0.23486 2017 11 18 58075 0.1338 0.2863 0.23352 2017 11 19 58076 0.1322 0.2858 0.23229 2017 11 20 58077 0.1306 0.2853 0.23119 2017 11 21 58078 0.1289 0.2849 0.23018 2017 11 22 58079 0.1273 0.2845 0.22924 2017 11 23 58080 0.1256 0.2840 0.22831 2017 11 24 58081 0.1240 0.2837 0.22735 2017 11 25 58082 0.1223 0.2833 0.22633 2017 11 26 58083 0.1207 0.2830 0.22520 2017 11 27 58084 0.1190 0.2827 0.22393 2017 11 28 58085 0.1173 0.2824 0.22253 2017 11 29 58086 0.1156 0.2821 0.22099 2017 11 30 58087 0.1140 0.2819 0.21935 2017 12 1 58088 0.1123 0.2817 0.21768 2017 12 2 58089 0.1106 0.2815 0.21606 2017 12 3 58090 0.1089 0.2814 0.21455 2017 12 4 58091 0.1072 0.2813 0.21318 2017 12 5 58092 0.1055 0.2812 0.21194 2017 12 6 58093 0.1038 0.2811 0.21076 2017 12 7 58094 0.1021 0.2811 0.20959 2017 12 8 58095 0.1004 0.2811 0.20835 2017 12 9 58096 0.0987 0.2811 0.20702 2017 12 10 58097 0.0971 0.2811 0.20560 2017 12 11 58098 0.0954 0.2812 0.20414 2017 12 12 58099 0.0937 0.2813 0.20267 2017 12 13 58100 0.0920 0.2814 0.20125 2017 12 14 58101 0.0903 0.2815 0.19991 2017 12 15 58102 0.0886 0.2817 0.19867 2017 12 16 58103 0.0870 0.2819 0.19754 2017 12 17 58104 0.0853 0.2821 0.19652 2017 12 18 58105 0.0836 0.2824 0.19558 2017 12 19 58106 0.0820 0.2827 0.19469 2017 12 20 58107 0.0803 0.2830 0.19382 2017 12 21 58108 0.0787 0.2833 0.19292 2017 12 22 58109 0.0771 0.2836 0.19195 2017 12 23 58110 0.0754 0.2840 0.19089 2017 12 24 58111 0.0738 0.2844 0.18972 2017 12 25 58112 0.0722 0.2849 0.18844 2017 12 26 58113 0.0706 0.2853 0.18706 2017 12 27 58114 0.0690 0.2858 0.18560 2017 12 28 58115 0.0674 0.2863 0.18412 2017 12 29 58116 0.0659 0.2868 0.18267 2017 12 30 58117 0.0643 0.2874 0.18130 2017 12 31 58118 0.0628 0.2880 0.18004 2018 1 1 58119 0.0612 0.2886 0.17887 2018 1 2 58120 0.0597 0.2892 0.17774 2018 1 3 58121 0.0582 0.2899 0.17656 2018 1 4 58122 0.0567 0.2906 0.17527 2018 1 5 58123 0.0552 0.2913 0.17385 2018 1 6 58124 0.0538 0.2920 0.17232 2018 1 7 58125 0.0523 0.2927 0.17072 2018 1 8 58126 0.0509 0.2935 0.16910 2018 1 9 58127 0.0494 0.2943 0.16751 2018 1 10 58128 0.0480 0.2951 0.16602 2018 1 11 58129 0.0466 0.2960 0.16470 2018 1 12 58130 0.0453 0.2968 0.16354 2018 1 13 58131 0.0439 0.2977 0.16253 2018 1 14 58132 0.0426 0.2986 0.16164 2018 1 15 58133 0.0413 0.2996 0.16085 2018 1 16 58134 0.0400 0.3005 0.16011 2018 1 17 58135 0.0387 0.3015 0.15936 2018 1 18 58136 0.0374 0.3025 0.15859 2018 1 19 58137 0.0362 0.3035 0.15777 2018 1 20 58138 0.0349 0.3045 0.15687 2018 1 21 58139 0.0337 0.3056 0.15583 2018 1 22 58140 0.0325 0.3067 0.15463 2018 1 23 58141 0.0314 0.3077 0.15331 2018 1 24 58142 0.0302 0.3089 0.15187 2018 1 25 58143 0.0291 0.3100 0.15037 2018 1 26 58144 0.0280 0.3111 0.14892 2018 1 27 58145 0.0270 0.3123 0.14755 2018 1 28 58146 0.0259 0.3135 0.14624 2018 1 29 58147 0.0249 0.3147 0.14500 2018 1 30 58148 0.0239 0.3159 0.14377 2018 1 31 58149 0.0229 0.3171 0.14248 2018 2 1 58150 0.0219 0.3184 0.14106 2018 2 2 58151 0.0210 0.3197 0.13954 2018 2 3 58152 0.0201 0.3209 0.13794 2018 2 4 58153 0.0192 0.3222 0.13631 2018 2 5 58154 0.0183 0.3235 0.13472 2018 2 6 58155 0.0175 0.3249 0.13323 2018 2 7 58156 0.0167 0.3262 0.13189 2018 2 8 58157 0.0159 0.3276 0.13070 2018 2 9 58158 0.0151 0.3289 0.12962 2018 2 10 58159 0.0144 0.3303 0.12864 2018 2 11 58160 0.0137 0.3317 0.12773 2018 2 12 58161 0.0130 0.3331 0.12686 2018 2 13 58162 0.0124 0.3345 0.12600 2018 2 14 58163 0.0117 0.3359 0.12506 2018 2 15 58164 0.0111 0.3374 0.12398 2018 2 16 58165 0.0106 0.3388 0.12275 2018 2 17 58166 0.0100 0.3403 0.12134 2018 2 18 58167 0.0095 0.3417 0.11983 2018 2 19 58168 0.0090 0.3432 0.11823 2018 2 20 58169 0.0086 0.3447 0.11653 2018 2 21 58170 0.0081 0.3462 0.11481 2018 2 22 58171 0.0077 0.3477 0.11315 2018 2 23 58172 0.0073 0.3492 0.11157 2018 2 24 58173 0.0070 0.3507 0.11009 2018 2 25 58174 0.0067 0.3522 0.10871 2018 2 26 58175 0.0064 0.3537 0.10737 2018 2 27 58176 0.0061 0.3553 0.10604 2018 2 28 58177 0.0059 0.3568 0.10465 2018 3 1 58178 0.0057 0.3584 0.10315 2018 3 2 58179 0.0055 0.3599 0.10147 2018 3 3 58180 0.0054 0.3614 0.09967 2018 3 4 58181 0.0053 0.3630 0.09783 2018 3 5 58182 0.0052 0.3645 0.09607 2018 3 6 58183 0.0051 0.3661 0.09432 2018 3 7 58184 0.0051 0.3677 0.09264 2018 3 8 58185 0.0051 0.3692 0.09108 2018 3 9 58186 0.0051 0.3708 0.08966 2018 3 10 58187 0.0052 0.3723 0.08829 2018 3 11 58188 0.0052 0.3739 0.08697 2018 3 12 58189 0.0054 0.3754 0.08567 2018 3 13 58190 0.0055 0.3770 0.08434 2018 3 14 58191 0.0057 0.3786 0.08295 2018 3 15 58192 0.0059 0.3801 0.08149 2018 3 16 58193 0.0061 0.3817 0.07995 2018 3 17 58194 0.0064 0.3832 0.07827 2018 3 18 58195 0.0067 0.3848 0.07645 2018 3 19 58196 0.0070 0.3863 0.07452 2018 3 20 58197 0.0073 0.3878 0.07258 2018 3 21 58198 0.0077 0.3894 0.07064 2018 3 22 58199 0.0081 0.3909 0.06871 2018 3 23 58200 0.0085 0.3924 0.06687 2018 3 24 58201 0.0090 0.3939 0.06513 2018 3 25 58202 0.0095 0.3954 0.06349 2018 3 26 58203 0.0100 0.3969 0.06187 2018 3 27 58204 0.0105 0.3984 0.06020 2018 3 28 58205 0.0111 0.3999 0.05843 2018 3 29 58206 0.0117 0.4014 0.05649 2018 3 30 58207 0.0123 0.4029 0.05442 2018 3 31 58208 0.0130 0.4043 0.05227 2018 4 1 58209 0.0136 0.4058 0.05017 2018 4 2 58210 0.0143 0.4072 0.04812 2018 4 3 58211 0.0151 0.4087 0.04621 2018 4 4 58212 0.0158 0.4101 0.04447 2018 4 5 58213 0.0166 0.4115 0.04286 2018 4 6 58214 0.0174 0.4129 0.04130 2018 4 7 58215 0.0182 0.4143 0.03977 2018 4 8 58216 0.0191 0.4156 0.03825 2018 4 9 58217 0.0200 0.4170 0.03671 2018 4 10 58218 0.0209 0.4183 0.03515 2018 4 11 58219 0.0218 0.4197 0.03351 2018 4 12 58220 0.0228 0.4210 0.03177 2018 4 13 58221 0.0238 0.4223 0.02989 2018 4 14 58222 0.0248 0.4236 0.02788 2018 4 15 58223 0.0258 0.4249 0.02577 2018 4 16 58224 0.0268 0.4261 0.02361 2018 4 17 58225 0.0279 0.4274 0.02153 2018 4 18 58226 0.0290 0.4286 0.01957 2018 4 19 58227 0.0301 0.4298 0.01773 2018 4 20 58228 0.0313 0.4310 0.01606 2018 4 21 58229 0.0324 0.4322 0.01455 2018 4 22 58230 0.0336 0.4333 0.01315 2018 4 23 58231 0.0348 0.4345 0.01178 2018 4 24 58232 0.0360 0.4356 0.01037 2018 4 25 58233 0.0373 0.4367 0.00890 2018 4 26 58234 0.0385 0.4378 0.00731 2018 4 27 58235 0.0398 0.4388 0.00558 2018 4 28 58236 0.0411 0.4399 0.00379 2018 4 29 58237 0.0424 0.4409 0.00204 2018 4 30 58238 0.0437 0.4419 0.00041 2018 5 1 58239 0.0451 0.4429 -0.00106 2018 5 2 58240 0.0465 0.4439 -0.00237 2018 5 3 58241 0.0478 0.4448 -0.00351 2018 5 4 58242 0.0492 0.4457 -0.00453 2018 5 5 58243 0.0507 0.4466 -0.00552 2018 5 6 58244 0.0521 0.4475 -0.00655 2018 5 7 58245 0.0535 0.4483 -0.00761 2018 5 8 58246 0.0550 0.4492 -0.00873 2018 5 9 58247 0.0565 0.4500 -0.01001 2018 5 10 58248 0.0580 0.4508 -0.01148 2018 5 11 58249 0.0595 0.4515 -0.01307 2018 5 12 58250 0.0610 0.4523 -0.01475 2018 5 13 58251 0.0625 0.4530 -0.01651 2018 5 14 58252 0.0640 0.4537 -0.01832 2018 5 15 58253 0.0656 0.4543 -0.02013 2018 5 16 58254 0.0672 0.4550 -0.02186 2018 5 17 58255 0.0687 0.4556 -0.02349 2018 5 18 58256 0.0703 0.4562 -0.02495 2018 5 19 58257 0.0719 0.4568 -0.02626 2018 5 20 58258 0.0735 0.4573 -0.02756 2018 5 21 58259 0.0751 0.4578 -0.02890 2018 5 22 58260 0.0767 0.4583 -0.03027 2018 5 23 58261 0.0784 0.4588 -0.03169 2018 5 24 58262 0.0800 0.4592 -0.03314 2018 5 25 58263 0.0816 0.4596 -0.03455 2018 5 26 58264 0.0833 0.4600 -0.03588 2018 5 27 58265 0.0849 0.4604 -0.03709 2018 5 28 58266 0.0866 0.4607 -0.03812 2018 5 29 58267 0.0883 0.4610 -0.03898 2018 5 30 58268 0.0899 0.4613 -0.03969 2018 5 31 58269 0.0916 0.4616 -0.04027 2018 6 1 58270 0.0933 0.4618 -0.04080 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) 57883 -98.47 0.30 -12.48 0.02 57884 -98.68 0.30 -12.47 0.02 57885 -98.84 0.30 -12.59 0.02 57886 -98.94 0.30 -12.72 0.03 57887 -99.05 0.10 -12.83 0.03 57888 -99.27 0.10 -12.97 0.03 57889 -99.53 0.14 -13.11 0.03 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57845 -98.9 -12.7 57846 -98.8 -12.6 57847 -98.7 -12.6 57848 -98.5 -12.6 57849 -98.2 -12.6 57850 -97.9 -12.7 57851 -97.7 -12.8 57852 -97.6 -12.8 57853 -97.6 -12.7 57854 -97.6 -12.6 57855 -97.8 -12.5 57856 -98.1 -12.5 57857 -98.3 -12.6 57858 -98.5 -12.6 57859 -98.5 -12.7 57860 -98.5 -12.9 57861 -98.5 -13.0 57862 -98.2 -12.9 57863 -97.7 -12.9 57864 -97.4 -12.8 57865 -97.4 -12.9 57866 -97.6 -13.0 57867 -97.7 -13.0 57868 -97.5 -12.8 57869 -97.5 -12.7 57870 -98.0 -12.8 57871 -98.7 -13.1 57872 -99.1 -13.3 57873 -99.1 -13.3 57874 -98.9 -13.2 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57883 -0.081 0.119 0.181 0.020 57884 -0.079 0.119 0.202 0.020 57885 -0.097 0.119 0.218 0.020 57886 -0.121 0.119 0.240 0.030 57887 -0.143 0.040 0.262 0.030 57888 -0.173 0.040 0.270 0.030 57889 -0.219 0.056 0.287 0.030 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57845 -0.08 -0.09 57846 -0.06 -0.04 57847 -0.08 -0.09 57848 -0.10 -0.09 57849 -0.11 -0.06 57850 -0.13 -0.11 57851 -0.14 -0.15 57852 -0.11 -0.11 57853 -0.07 -0.03 57854 -0.02 -0.02 57855 -0.05 -0.01 57856 -0.10 -0.03 57857 -0.09 -0.08 57858 -0.12 0.01 57859 -0.10 0.04 57860 -0.10 -0.01 57861 -0.13 0.00 57862 -0.13 0.10 57863 -0.13 0.02 57864 -0.15 0.04 57865 -0.13 -0.01 57866 -0.09 -0.02 57867 -0.08 -0.06 57868 -0.06 -0.05 57869 -0.07 -0.08 57870 -0.12 -0.04 57871 -0.16 -0.01 57872 -0.16 0.05 57873 -0.17 0.08 57874 -0.19 0.08 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).