********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 January 2017 Vol. XXX No. 004 ______________________________________________________________________ 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 = +0.5 seconds beginning 26 Jan 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 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 17 1 20 57773 0.04692 .00009 0.27206 .00009 0.566140 0.000005 17 1 21 57774 0.04439 .00009 0.27275 .00009 0.565071 0.000005 17 1 22 57775 0.04243 .00009 0.27356 .00009 0.564035 0.000005 17 1 23 57776 0.04093 .00009 0.27454 .00009 0.563116 0.000003 17 1 24 57777 0.03967 .00009 0.27562 .00009 0.562239 0.000003 17 1 25 57778 0.03847 .00009 0.27659 .00009 0.561436 0.000002 17 1 26 57779 0.03714 .00009 0.27764 .00009 0.560664 0.000002 _______________________________________________________________________ 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 = 0.1085 - 0.0842 cos A - 0.0533 sin A + 0.0113 cos C - 0.0335 sin C y = 0.3632 - 0.0506 cos A + 0.0801 sin A - 0.0335 cos C - 0.0113 sin C UT1-UTC = 0.5561 - 0.00126 (MJD - 57787) - (UT2-UT1) where A = 2*pi*(MJD-57779)/365.25 and C = 2*pi*(MJD-57779)/435. TAI-UTC(MJD 57780) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57779)**0.80 S t = 0.00025 (MJD-57779)**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 1 27 57780 0.0357 0.2786 0.55990 2017 1 28 57781 0.0341 0.2797 0.55906 2017 1 29 57782 0.0324 0.2808 0.55811 2017 1 30 57783 0.0307 0.2819 0.55701 2017 1 31 57784 0.0292 0.2829 0.55580 2017 2 1 57785 0.0279 0.2840 0.55451 2017 2 2 57786 0.0266 0.2851 0.55315 2017 2 3 57787 0.0253 0.2862 0.55178 2017 2 4 57788 0.0240 0.2875 0.55046 2017 2 5 57789 0.0228 0.2887 0.54923 2017 2 6 57790 0.0215 0.2900 0.54807 2017 2 7 57791 0.0202 0.2914 0.54698 2017 2 8 57792 0.0188 0.2927 0.54591 2017 2 9 57793 0.0174 0.2941 0.54479 2017 2 10 57794 0.0160 0.2955 0.54359 2017 2 11 57795 0.0147 0.2970 0.54230 2017 2 12 57796 0.0134 0.2984 0.54091 2017 2 13 57797 0.0122 0.2998 0.53943 2017 2 14 57798 0.0112 0.3012 0.53792 2017 2 15 57799 0.0102 0.3027 0.53640 2017 2 16 57800 0.0094 0.3041 0.53493 2017 2 17 57801 0.0085 0.3056 0.53351 2017 2 18 57802 0.0076 0.3071 0.53217 2017 2 19 57803 0.0067 0.3086 0.53093 2017 2 20 57804 0.0059 0.3102 0.52975 2017 2 21 57805 0.0050 0.3117 0.52862 2017 2 22 57806 0.0042 0.3133 0.52750 2017 2 23 57807 0.0035 0.3148 0.52635 2017 2 24 57808 0.0028 0.3164 0.52512 2017 2 25 57809 0.0021 0.3180 0.52376 2017 2 26 57810 0.0015 0.3196 0.52224 2017 2 27 57811 0.0009 0.3212 0.52055 2017 2 28 57812 0.0003 0.3228 0.51870 2017 3 1 57813 -0.0003 0.3245 0.51676 2017 3 2 57814 -0.0008 0.3261 0.51480 2017 3 3 57815 -0.0013 0.3278 0.51289 2017 3 4 57816 -0.0018 0.3295 0.51108 2017 3 5 57817 -0.0023 0.3312 0.50939 2017 3 6 57818 -0.0027 0.3329 0.50781 2017 3 7 57819 -0.0031 0.3346 0.50629 2017 3 8 57820 -0.0034 0.3363 0.50477 2017 3 9 57821 -0.0037 0.3380 0.50321 2017 3 10 57822 -0.0040 0.3397 0.50157 2017 3 11 57823 -0.0042 0.3414 0.49983 2017 3 12 57824 -0.0044 0.3431 0.49801 2017 3 13 57825 -0.0045 0.3448 0.49616 2017 3 14 57826 -0.0046 0.3466 0.49431 2017 3 15 57827 -0.0047 0.3483 0.49250 2017 3 16 57828 -0.0048 0.3500 0.49076 2017 3 17 57829 -0.0048 0.3517 0.48911 2017 3 18 57830 -0.0048 0.3535 0.48755 2017 3 19 57831 -0.0048 0.3552 0.48607 2017 3 20 57832 -0.0047 0.3569 0.48465 2017 3 21 57833 -0.0046 0.3586 0.48327 2017 3 22 57834 -0.0045 0.3604 0.48188 2017 3 23 57835 -0.0043 0.3621 0.48043 2017 3 24 57836 -0.0041 0.3638 0.47888 2017 3 25 57837 -0.0039 0.3656 0.47719 2017 3 26 57838 -0.0036 0.3673 0.47533 2017 3 27 57839 -0.0033 0.3690 0.47329 2017 3 28 57840 -0.0030 0.3707 0.47113 2017 3 29 57841 -0.0027 0.3724 0.46890 2017 3 30 57842 -0.0023 0.3741 0.46670 2017 3 31 57843 -0.0019 0.3758 0.46461 2017 4 1 57844 -0.0014 0.3775 0.46266 2017 4 2 57845 -0.0009 0.3792 0.46087 2017 4 3 57846 -0.0004 0.3809 0.45920 2017 4 4 57847 0.0001 0.3826 0.45759 2017 4 5 57848 0.0007 0.3842 0.45597 2017 4 6 57849 0.0013 0.3859 0.45432 2017 4 7 57850 0.0020 0.3875 0.45260 2017 4 8 57851 0.0026 0.3892 0.45080 2017 4 9 57852 0.0033 0.3908 0.44896 2017 4 10 57853 0.0041 0.3924 0.44711 2017 4 11 57854 0.0048 0.3940 0.44529 2017 4 12 57855 0.0056 0.3956 0.44355 2017 4 13 57856 0.0064 0.3972 0.44189 2017 4 14 57857 0.0073 0.3988 0.44035 2017 4 15 57858 0.0081 0.4004 0.43892 2017 4 16 57859 0.0090 0.4019 0.43758 2017 4 17 57860 0.0099 0.4034 0.43631 2017 4 18 57861 0.0109 0.4050 0.43506 2017 4 19 57862 0.0119 0.4065 0.43379 2017 4 20 57863 0.0129 0.4080 0.43245 2017 4 21 57864 0.0139 0.4095 0.43099 2017 4 22 57865 0.0150 0.4109 0.42938 2017 4 23 57866 0.0161 0.4124 0.42761 2017 4 24 57867 0.0172 0.4138 0.42568 2017 4 25 57868 0.0183 0.4152 0.42364 2017 4 26 57869 0.0195 0.4166 0.42159 2017 4 27 57870 0.0207 0.4180 0.41961 2017 4 28 57871 0.0219 0.4194 0.41776 2017 4 29 57872 0.0231 0.4207 0.41609 2017 4 30 57873 0.0244 0.4220 0.41457 2017 5 1 57874 0.0257 0.4233 0.41315 2017 5 2 57875 0.0270 0.4246 0.41175 2017 5 3 57876 0.0283 0.4259 0.41034 2017 5 4 57877 0.0297 0.4272 0.40888 2017 5 5 57878 0.0310 0.4284 0.40737 2017 5 6 57879 0.0324 0.4296 0.40582 2017 5 7 57880 0.0338 0.4308 0.40427 2017 5 8 57881 0.0353 0.4320 0.40275 2017 5 9 57882 0.0367 0.4331 0.40130 2017 5 10 57883 0.0382 0.4342 0.39995 2017 5 11 57884 0.0397 0.4353 0.39871 2017 5 12 57885 0.0412 0.4364 0.39760 2017 5 13 57886 0.0427 0.4375 0.39659 2017 5 14 57887 0.0443 0.4385 0.39568 2017 5 15 57888 0.0459 0.4395 0.39483 2017 5 16 57889 0.0474 0.4405 0.39399 2017 5 17 57890 0.0490 0.4415 0.39311 2017 5 18 57891 0.0507 0.4424 0.39215 2017 5 19 57892 0.0523 0.4433 0.39107 2017 5 20 57893 0.0539 0.4442 0.38985 2017 5 21 57894 0.0556 0.4451 0.38847 2017 5 22 57895 0.0573 0.4459 0.38698 2017 5 23 57896 0.0590 0.4467 0.38542 2017 5 24 57897 0.0607 0.4475 0.38388 2017 5 25 57898 0.0624 0.4483 0.38244 2017 5 26 57899 0.0641 0.4490 0.38115 2017 5 27 57900 0.0658 0.4498 0.38002 2017 5 28 57901 0.0676 0.4504 0.37902 2017 5 29 57902 0.0694 0.4511 0.37807 2017 5 30 57903 0.0711 0.4517 0.37713 2017 5 31 57904 0.0729 0.4524 0.37615 2017 6 1 57905 0.0747 0.4529 0.37512 2017 6 2 57906 0.0765 0.4535 0.37407 2017 6 3 57907 0.0783 0.4540 0.37302 2017 6 4 57908 0.0801 0.4545 0.37201 2017 6 5 57909 0.0819 0.4550 0.37107 2017 6 6 57910 0.0838 0.4554 0.37022 2017 6 7 57911 0.0856 0.4559 0.36949 2017 6 8 57912 0.0874 0.4563 0.36888 2017 6 9 57913 0.0893 0.4566 0.36838 2017 6 10 57914 0.0911 0.4570 0.36798 2017 6 11 57915 0.0930 0.4573 0.36764 2017 6 12 57916 0.0948 0.4576 0.36732 2017 6 13 57917 0.0967 0.4578 0.36698 2017 6 14 57918 0.0985 0.4580 0.36658 2017 6 15 57919 0.1004 0.4582 0.36607 2017 6 16 57920 0.1023 0.4584 0.36544 2017 6 17 57921 0.1041 0.4585 0.36468 2017 6 18 57922 0.1060 0.4587 0.36380 2017 6 19 57923 0.1078 0.4587 0.36283 2017 6 20 57924 0.1097 0.4588 0.36184 2017 6 21 57925 0.1116 0.4588 0.36089 2017 6 22 57926 0.1134 0.4588 0.36006 2017 6 23 57927 0.1153 0.4588 0.35936 2017 6 24 57928 0.1171 0.4587 0.35879 2017 6 25 57929 0.1190 0.4587 0.35829 2017 6 26 57930 0.1208 0.4586 0.35779 2017 6 27 57931 0.1227 0.4584 0.35724 2017 6 28 57932 0.1245 0.4583 0.35663 2017 6 29 57933 0.1263 0.4581 0.35597 2017 6 30 57934 0.1282 0.4578 0.35529 2017 7 1 57935 0.1300 0.4576 0.35464 2017 7 2 57936 0.1318 0.4573 0.35405 2017 7 3 57937 0.1336 0.4570 0.35355 2017 7 4 57938 0.1354 0.4567 0.35315 2017 7 5 57939 0.1372 0.4563 0.35286 2017 7 6 57940 0.1389 0.4559 0.35268 2017 7 7 57941 0.1407 0.4555 0.35259 2017 7 8 57942 0.1425 0.4551 0.35256 2017 7 9 57943 0.1442 0.4546 0.35254 2017 7 10 57944 0.1459 0.4541 0.35251 2017 7 11 57945 0.1477 0.4536 0.35240 2017 7 12 57946 0.1494 0.4531 0.35219 2017 7 13 57947 0.1511 0.4525 0.35186 2017 7 14 57948 0.1528 0.4519 0.35138 2017 7 15 57949 0.1544 0.4513 0.35079 2017 7 16 57950 0.1561 0.4507 0.35010 2017 7 17 57951 0.1577 0.4500 0.34938 2017 7 18 57952 0.1594 0.4493 0.34868 2017 7 19 57953 0.1610 0.4486 0.34805 2017 7 20 57954 0.1626 0.4478 0.34753 2017 7 21 57955 0.1641 0.4471 0.34712 2017 7 22 57956 0.1657 0.4463 0.34679 2017 7 23 57957 0.1673 0.4455 0.34646 2017 7 24 57958 0.1688 0.4446 0.34610 2017 7 25 57959 0.1703 0.4438 0.34566 2017 7 26 57960 0.1718 0.4429 0.34514 2017 7 27 57961 0.1733 0.4420 0.34459 2017 7 28 57962 0.1747 0.4410 0.34406 2017 7 29 57963 0.1762 0.4401 0.34358 2017 7 30 57964 0.1776 0.4391 0.34322 2017 7 31 57965 0.1790 0.4381 0.34298 2017 8 1 57966 0.1803 0.4371 0.34288 2017 8 2 57967 0.1817 0.4361 0.34291 2017 8 3 57968 0.1830 0.4350 0.34303 2017 8 4 57969 0.1843 0.4339 0.34322 2017 8 5 57970 0.1856 0.4328 0.34341 2017 8 6 57971 0.1869 0.4317 0.34353 2017 8 7 57972 0.1881 0.4306 0.34355 2017 8 8 57973 0.1894 0.4294 0.34340 2017 8 9 57974 0.1905 0.4283 0.34307 2017 8 10 57975 0.1917 0.4271 0.34254 2017 8 11 57976 0.1929 0.4259 0.34185 2017 8 12 57977 0.1940 0.4246 0.34104 2017 8 13 57978 0.1951 0.4234 0.34017 2017 8 14 57979 0.1962 0.4221 0.33930 2017 8 15 57980 0.1972 0.4209 0.33849 2017 8 16 57981 0.1982 0.4196 0.33779 2017 8 17 57982 0.1992 0.4183 0.33720 2017 8 18 57983 0.2002 0.4170 0.33670 2017 8 19 57984 0.2012 0.4156 0.33625 2017 8 20 57985 0.2021 0.4143 0.33576 2017 8 21 57986 0.2030 0.4129 0.33519 2017 8 22 57987 0.2038 0.4115 0.33449 2017 8 23 57988 0.2047 0.4101 0.33369 2017 8 24 57989 0.2055 0.4087 0.33282 2017 8 25 57990 0.2063 0.4073 0.33193 2017 8 26 57991 0.2070 0.4059 0.33107 2017 8 27 57992 0.2077 0.4045 0.33027 2017 8 28 57993 0.2084 0.4030 0.32954 2017 8 29 57994 0.2091 0.4015 0.32887 2017 8 30 57995 0.2098 0.4001 0.32825 2017 8 31 57996 0.2104 0.3986 0.32767 2017 9 1 57997 0.2110 0.3971 0.32709 2017 9 2 57998 0.2115 0.3956 0.32649 2017 9 3 57999 0.2120 0.3941 0.32581 2017 9 4 58000 0.2125 0.3926 0.32497 2017 9 5 58001 0.2130 0.3911 0.32394 2017 9 6 58002 0.2134 0.3896 0.32270 2017 9 7 58003 0.2138 0.3880 0.32123 2017 9 8 58004 0.2142 0.3865 0.31969 2017 9 9 58005 0.2146 0.3849 0.31810 2017 9 10 58006 0.2149 0.3834 0.31654 2017 9 11 58007 0.2152 0.3818 0.31507 2017 9 12 58008 0.2154 0.3803 0.31375 2017 9 13 58009 0.2157 0.3787 0.31256 2017 9 14 58010 0.2159 0.3771 0.31149 2017 9 15 58011 0.2160 0.3756 0.31048 2017 9 16 58012 0.2162 0.3740 0.30949 2017 9 17 58013 0.2163 0.3724 0.30838 2017 9 18 58014 0.2164 0.3709 0.30721 2017 9 19 58015 0.2164 0.3693 0.30596 2017 9 20 58016 0.2164 0.3677 0.30457 2017 9 21 58017 0.2164 0.3661 0.30316 2017 9 22 58018 0.2164 0.3645 0.30173 2017 9 23 58019 0.2163 0.3630 0.30042 2017 9 24 58020 0.2162 0.3614 0.29914 2017 9 25 58021 0.2161 0.3598 0.29789 2017 9 26 58022 0.2160 0.3583 0.29675 2017 9 27 58023 0.2158 0.3567 0.29568 2017 9 28 58024 0.2156 0.3551 0.29462 2017 9 29 58025 0.2153 0.3536 0.29355 2017 9 30 58026 0.2150 0.3520 0.29240 2017 10 1 58027 0.2147 0.3504 0.29107 2017 10 2 58028 0.2144 0.3489 0.28961 2017 10 3 58029 0.2140 0.3474 0.28791 2017 10 4 58030 0.2136 0.3458 0.28601 2017 10 5 58031 0.2132 0.3443 0.28394 2017 10 6 58032 0.2128 0.3428 0.28175 2017 10 7 58033 0.2123 0.3412 0.27949 2017 10 8 58034 0.2118 0.3397 0.27728 2017 10 9 58035 0.2113 0.3382 0.27521 2017 10 10 58036 0.2107 0.3367 0.27324 2017 10 11 58037 0.2101 0.3353 0.27132 2017 10 12 58038 0.2095 0.3338 0.26948 2017 10 13 58039 0.2089 0.3323 0.26762 2017 10 14 58040 0.2082 0.3309 0.26571 2017 10 15 58041 0.2075 0.3294 0.26362 2017 10 16 58042 0.2068 0.3280 0.26134 2017 10 17 58043 0.2061 0.3266 0.25899 2017 10 18 58044 0.2053 0.3251 0.25662 2017 10 19 58045 0.2045 0.3237 0.25436 2017 10 20 58046 0.2037 0.3224 0.25220 2017 10 21 58047 0.2028 0.3210 0.25016 2017 10 22 58048 0.2020 0.3196 0.24824 2017 10 23 58049 0.2011 0.3183 0.24639 2017 10 24 58050 0.2001 0.3169 0.24467 2017 10 25 58051 0.1992 0.3156 0.24308 2017 10 26 58052 0.1982 0.3143 0.24159 2017 10 27 58053 0.1972 0.3130 0.24016 2017 10 28 58054 0.1962 0.3117 0.23874 2017 10 29 58055 0.1952 0.3105 0.23727 2017 10 30 58056 0.1941 0.3092 0.23569 2017 10 31 58057 0.1931 0.3080 0.23387 2017 11 1 58058 0.1920 0.3068 0.23194 2017 11 2 58059 0.1908 0.3056 0.22981 2017 11 3 58060 0.1897 0.3044 0.22764 2017 11 4 58061 0.1885 0.3033 0.22549 2017 11 5 58062 0.1874 0.3021 0.22343 2017 11 6 58063 0.1861 0.3010 0.22156 2017 11 7 58064 0.1849 0.2999 0.21986 2017 11 8 58065 0.1837 0.2988 0.21835 2017 11 9 58066 0.1824 0.2978 0.21681 2017 11 10 58067 0.1812 0.2967 0.21528 2017 11 11 58068 0.1799 0.2957 0.21366 2017 11 12 58069 0.1785 0.2947 0.21201 2017 11 13 58070 0.1772 0.2937 0.21035 2017 11 14 58071 0.1759 0.2927 0.20865 2017 11 15 58072 0.1745 0.2918 0.20692 2017 11 16 58073 0.1731 0.2909 0.20517 2017 11 17 58074 0.1717 0.2900 0.20353 2017 11 18 58075 0.1703 0.2891 0.20205 2017 11 19 58076 0.1689 0.2882 0.20069 2017 11 20 58077 0.1675 0.2874 0.19944 2017 11 21 58078 0.1660 0.2866 0.19824 2017 11 22 58079 0.1646 0.2858 0.19724 2017 11 23 58080 0.1631 0.2850 0.19622 2017 11 24 58081 0.1616 0.2843 0.19515 2017 11 25 58082 0.1601 0.2836 0.19403 2017 11 26 58083 0.1586 0.2829 0.19274 2017 11 27 58084 0.1571 0.2822 0.19127 2017 11 28 58085 0.1556 0.2815 0.18964 2017 11 29 58086 0.1540 0.2809 0.18789 2017 11 30 58087 0.1525 0.2803 0.18603 2017 12 1 58088 0.1509 0.2797 0.18412 2017 12 2 58089 0.1494 0.2792 0.18236 2017 12 3 58090 0.1478 0.2786 0.18063 2017 12 4 58091 0.1462 0.2781 0.17916 2017 12 5 58092 0.1446 0.2777 0.17774 2017 12 6 58093 0.1430 0.2772 0.17634 2017 12 7 58094 0.1414 0.2768 0.17485 2017 12 8 58095 0.1398 0.2764 0.17327 2017 12 9 58096 0.1382 0.2760 0.17157 2017 12 10 58097 0.1366 0.2756 0.16979 2017 12 11 58098 0.1350 0.2753 0.16793 2017 12 12 58099 0.1334 0.2750 0.16611 2017 12 13 58100 0.1318 0.2747 0.16427 2017 12 14 58101 0.1301 0.2744 0.16252 2017 12 15 58102 0.1285 0.2742 0.16092 2017 12 16 58103 0.1269 0.2740 0.15955 2017 12 17 58104 0.1252 0.2738 0.15827 2017 12 18 58105 0.1236 0.2736 0.15700 2017 12 19 58106 0.1220 0.2735 0.15587 2017 12 20 58107 0.1204 0.2734 0.15464 2017 12 21 58108 0.1187 0.2733 0.15351 2017 12 22 58109 0.1171 0.2733 0.15235 2017 12 23 58110 0.1155 0.2732 0.15109 2017 12 24 58111 0.1139 0.2732 0.14971 2017 12 25 58112 0.1122 0.2733 0.14820 2017 12 26 58113 0.1106 0.2733 0.14651 2017 12 27 58114 0.1090 0.2734 0.14473 2017 12 28 58115 0.1074 0.2735 0.14294 2017 12 29 58116 0.1058 0.2736 0.14118 2017 12 30 58117 0.1042 0.2737 0.13940 2017 12 31 58118 0.1026 0.2739 0.13787 2018 1 1 58119 0.1010 0.2741 0.13637 2018 1 2 58120 0.0994 0.2743 0.13485 2018 1 3 58121 0.0979 0.2745 0.13328 2018 1 4 58122 0.0963 0.2748 0.13168 2018 1 5 58123 0.0948 0.2751 0.13001 2018 1 6 58124 0.0932 0.2754 0.12820 2018 1 7 58125 0.0917 0.2758 0.12637 2018 1 8 58126 0.0902 0.2761 0.12464 2018 1 9 58127 0.0886 0.2765 0.12303 2018 1 10 58128 0.0871 0.2769 0.12140 2018 1 11 58129 0.0856 0.2774 0.11990 2018 1 12 58130 0.0842 0.2778 0.11857 2018 1 13 58131 0.0827 0.2783 0.11734 2018 1 14 58132 0.0812 0.2788 0.11626 2018 1 15 58133 0.0798 0.2793 0.11526 2018 1 16 58134 0.0783 0.2799 0.11434 2018 1 17 58135 0.0769 0.2804 0.11339 2018 1 18 58136 0.0755 0.2810 0.11256 2018 1 19 58137 0.0741 0.2817 0.11161 2018 1 20 58138 0.0727 0.2823 0.11055 2018 1 21 58139 0.0714 0.2830 0.10934 2018 1 22 58140 0.0700 0.2836 0.10799 2018 1 23 58141 0.0687 0.2843 0.10652 2018 1 24 58142 0.0674 0.2851 0.10493 2018 1 25 58143 0.0661 0.2858 0.10337 2018 1 26 58144 0.0648 0.2866 0.10171 These predictions are based on all announced leap seconds. 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).