********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 12 January 2017 Vol. XXX No. 002 ______________________________________________________________________ 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 = +0.6 seconds beginning 01 Jan 2017 at 0000 UTC = +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. * * * * A positive leap second WAS introduced in UTC on 31 December 2016. * * * * In the 05 Jan 2017 issue of IERS Bulletin A (Rapid Service/ * * Predictions of Earth Orientation information) -- Vol. XXX, No.001 * * -- an abbreviation for January (Jan) was used in the line above * * TAI-UTC = 37.000 000 seconds * * In subsequent issues of the IERS Bulletin A, abbreviations for * * the month will no longer be used in this line. * * * * 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 6 57759 0.07693 .00009 0.26499 .00009 0.584451 0.000012 17 1 7 57760 0.07515 .00009 0.26508 .00009 0.582839 0.000012 17 1 8 57761 0.07372 .00009 0.26527 .00009 0.581285 0.000011 17 1 9 57762 0.07242 .00009 0.26536 .00009 0.579837 0.000006 17 1 10 57763 0.07101 .00009 0.26558 .00009 0.578512 0.000005 17 1 11 57764 0.06926 .00010 0.26605 .00009 0.577318 0.000005 17 1 12 57765 0.06725 .00010 0.26676 .00009 0.576154 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 = 0.1204 - 0.0718 cos A - 0.0760 sin A + 0.0185 cos C - 0.0256 sin C y = 0.3632 - 0.0711 cos A + 0.0688 sin A - 0.0256 cos C - 0.0185 sin C UT1-UTC = 0.5717 - 0.00128 (MJD - 57773) - (UT2-UT1) where A = 2*pi*(MJD-57765)/365.25 and C = 2*pi*(MJD-57765)/435. TAI-UTC(MJD 57766) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57765)**0.80 S t = 0.00025 (MJD-57765)**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 13 57766 0.0652 0.2674 0.57500 2017 1 14 57767 0.0631 0.2682 0.57383 2017 1 15 57768 0.0612 0.2688 0.57263 2017 1 16 57769 0.0594 0.2695 0.57142 2017 1 17 57770 0.0577 0.2701 0.57026 2017 1 18 57771 0.0561 0.2708 0.56917 2017 1 19 57772 0.0545 0.2715 0.56814 2017 1 20 57773 0.0529 0.2722 0.56719 2017 1 21 57774 0.0514 0.2729 0.56632 2017 1 22 57775 0.0500 0.2737 0.56550 2017 1 23 57776 0.0486 0.2744 0.56468 2017 1 24 57777 0.0473 0.2752 0.56387 2017 1 25 57778 0.0460 0.2760 0.56305 2017 1 26 57779 0.0448 0.2768 0.56220 2017 1 27 57780 0.0436 0.2778 0.56127 2017 1 28 57781 0.0423 0.2787 0.56025 2017 1 29 57782 0.0410 0.2797 0.55910 2017 1 30 57783 0.0396 0.2806 0.55780 2017 1 31 57784 0.0383 0.2816 0.55635 2017 2 1 57785 0.0370 0.2826 0.55477 2017 2 2 57786 0.0357 0.2837 0.55313 2017 2 3 57787 0.0345 0.2848 0.55150 2017 2 4 57788 0.0332 0.2860 0.54991 2017 2 5 57789 0.0320 0.2871 0.54842 2017 2 6 57790 0.0308 0.2883 0.54704 2017 2 7 57791 0.0296 0.2895 0.54576 2017 2 8 57792 0.0284 0.2907 0.54452 2017 2 9 57793 0.0273 0.2919 0.54328 2017 2 10 57794 0.0262 0.2932 0.54198 2017 2 11 57795 0.0251 0.2944 0.54058 2017 2 12 57796 0.0240 0.2956 0.53908 2017 2 13 57797 0.0230 0.2969 0.53752 2017 2 14 57798 0.0220 0.2982 0.53592 2017 2 15 57799 0.0211 0.2995 0.53432 2017 2 16 57800 0.0202 0.3008 0.53276 2017 2 17 57801 0.0193 0.3021 0.53128 2017 2 18 57802 0.0184 0.3035 0.52988 2017 2 19 57803 0.0176 0.3048 0.52856 2017 2 20 57804 0.0167 0.3062 0.52733 2017 2 21 57805 0.0159 0.3076 0.52616 2017 2 22 57806 0.0152 0.3090 0.52501 2017 2 23 57807 0.0144 0.3105 0.52382 2017 2 24 57808 0.0137 0.3119 0.52254 2017 2 25 57809 0.0130 0.3134 0.52113 2017 2 26 57810 0.0123 0.3148 0.51955 2017 2 27 57811 0.0117 0.3163 0.51779 2017 2 28 57812 0.0111 0.3178 0.51587 2017 3 1 57813 0.0105 0.3193 0.51387 2017 3 2 57814 0.0099 0.3208 0.51184 2017 3 3 57815 0.0094 0.3224 0.50987 2017 3 4 57816 0.0089 0.3239 0.50801 2017 3 5 57817 0.0084 0.3254 0.50628 2017 3 6 57818 0.0080 0.3270 0.50467 2017 3 7 57819 0.0076 0.3285 0.50314 2017 3 8 57820 0.0072 0.3301 0.50162 2017 3 9 57821 0.0069 0.3316 0.50006 2017 3 10 57822 0.0066 0.3332 0.49843 2017 3 11 57823 0.0063 0.3348 0.49670 2017 3 12 57824 0.0060 0.3364 0.49490 2017 3 13 57825 0.0058 0.3379 0.49306 2017 3 14 57826 0.0056 0.3395 0.49121 2017 3 15 57827 0.0054 0.3411 0.48941 2017 3 16 57828 0.0053 0.3427 0.48768 2017 3 17 57829 0.0052 0.3443 0.48604 2017 3 18 57830 0.0051 0.3459 0.48450 2017 3 19 57831 0.0050 0.3475 0.48304 2017 3 20 57832 0.0050 0.3491 0.48166 2017 3 21 57833 0.0050 0.3507 0.48031 2017 3 22 57834 0.0051 0.3523 0.47895 2017 3 23 57835 0.0052 0.3540 0.47754 2017 3 24 57836 0.0053 0.3556 0.47603 2017 3 25 57837 0.0054 0.3572 0.47437 2017 3 26 57838 0.0056 0.3588 0.47254 2017 3 27 57839 0.0057 0.3604 0.47054 2017 3 28 57840 0.0060 0.3620 0.46840 2017 3 29 57841 0.0062 0.3636 0.46620 2017 3 30 57842 0.0065 0.3652 0.46403 2017 3 31 57843 0.0068 0.3668 0.46196 2017 4 1 57844 0.0071 0.3683 0.46005 2017 4 2 57845 0.0075 0.3699 0.45828 2017 4 3 57846 0.0079 0.3715 0.45663 2017 4 4 57847 0.0083 0.3731 0.45503 2017 4 5 57848 0.0088 0.3746 0.45342 2017 4 6 57849 0.0093 0.3762 0.45177 2017 4 7 57850 0.0098 0.3778 0.45005 2017 4 8 57851 0.0103 0.3793 0.44826 2017 4 9 57852 0.0109 0.3808 0.44642 2017 4 10 57853 0.0115 0.3824 0.44456 2017 4 11 57854 0.0121 0.3839 0.44274 2017 4 12 57855 0.0128 0.3854 0.44098 2017 4 13 57856 0.0134 0.3869 0.43930 2017 4 14 57857 0.0142 0.3884 0.43773 2017 4 15 57858 0.0149 0.3899 0.43626 2017 4 16 57859 0.0156 0.3914 0.43488 2017 4 17 57860 0.0164 0.3928 0.43356 2017 4 18 57861 0.0172 0.3943 0.43227 2017 4 19 57862 0.0181 0.3957 0.43096 2017 4 20 57863 0.0189 0.3972 0.42957 2017 4 21 57864 0.0198 0.3986 0.42808 2017 4 22 57865 0.0208 0.4000 0.42645 2017 4 23 57866 0.0217 0.4014 0.42464 2017 4 24 57867 0.0227 0.4027 0.42268 2017 4 25 57868 0.0236 0.4041 0.42063 2017 4 26 57869 0.0247 0.4054 0.41855 2017 4 27 57870 0.0257 0.4068 0.41654 2017 4 28 57871 0.0268 0.4081 0.41468 2017 4 29 57872 0.0278 0.4094 0.41298 2017 4 30 57873 0.0289 0.4107 0.41143 2017 5 1 57874 0.0301 0.4119 0.40999 2017 5 2 57875 0.0312 0.4132 0.40858 2017 5 3 57876 0.0324 0.4144 0.40715 2017 5 4 57877 0.0336 0.4156 0.40568 2017 5 5 57878 0.0348 0.4168 0.40416 2017 5 6 57879 0.0360 0.4180 0.40261 2017 5 7 57880 0.0373 0.4192 0.40105 2017 5 8 57881 0.0386 0.4203 0.39953 2017 5 9 57882 0.0399 0.4214 0.39808 2017 5 10 57883 0.0412 0.4225 0.39672 2017 5 11 57884 0.0425 0.4236 0.39547 2017 5 12 57885 0.0439 0.4247 0.39435 2017 5 13 57886 0.0452 0.4257 0.39333 2017 5 14 57887 0.0466 0.4268 0.39240 2017 5 15 57888 0.0480 0.4278 0.39152 2017 5 16 57889 0.0494 0.4288 0.39065 2017 5 17 57890 0.0509 0.4297 0.38974 2017 5 18 57891 0.0523 0.4307 0.38875 2017 5 19 57892 0.0538 0.4316 0.38764 2017 5 20 57893 0.0553 0.4325 0.38639 2017 5 21 57894 0.0568 0.4334 0.38499 2017 5 22 57895 0.0583 0.4342 0.38347 2017 5 23 57896 0.0598 0.4350 0.38189 2017 5 24 57897 0.0613 0.4358 0.38033 2017 5 25 57898 0.0629 0.4366 0.37886 2017 5 26 57899 0.0645 0.4374 0.37755 2017 5 27 57900 0.0660 0.4381 0.37640 2017 5 28 57901 0.0676 0.4388 0.37537 2017 5 29 57902 0.0692 0.4395 0.37440 2017 5 30 57903 0.0708 0.4402 0.37343 2017 5 31 57904 0.0724 0.4408 0.37242 2017 6 1 57905 0.0741 0.4415 0.37137 2017 6 2 57906 0.0757 0.4421 0.37029 2017 6 3 57907 0.0773 0.4426 0.36922 2017 6 4 57908 0.0790 0.4432 0.36817 2017 6 5 57909 0.0807 0.4437 0.36720 2017 6 6 57910 0.0823 0.4442 0.36632 2017 6 7 57911 0.0840 0.4447 0.36555 2017 6 8 57912 0.0857 0.4451 0.36490 2017 6 9 57913 0.0874 0.4455 0.36436 2017 6 10 57914 0.0890 0.4459 0.36391 2017 6 11 57915 0.0907 0.4463 0.36352 2017 6 12 57916 0.0924 0.4466 0.36315 2017 6 13 57917 0.0941 0.4469 0.36276 2017 6 14 57918 0.0958 0.4472 0.36230 2017 6 15 57919 0.0975 0.4475 0.36173 2017 6 16 57920 0.0993 0.4477 0.36104 2017 6 17 57921 0.1010 0.4480 0.36022 2017 6 18 57922 0.1027 0.4481 0.35927 2017 6 19 57923 0.1044 0.4483 0.35824 2017 6 20 57924 0.1061 0.4484 0.35718 2017 6 21 57925 0.1078 0.4486 0.35618 2017 6 22 57926 0.1095 0.4486 0.35529 2017 6 23 57927 0.1112 0.4487 0.35453 2017 6 24 57928 0.1129 0.4487 0.35390 2017 6 25 57929 0.1147 0.4487 0.35334 2017 6 26 57930 0.1164 0.4487 0.35279 2017 6 27 57931 0.1181 0.4487 0.35219 2017 6 28 57932 0.1198 0.4486 0.35154 2017 6 29 57933 0.1214 0.4485 0.35083 2017 6 30 57934 0.1231 0.4484 0.35012 2017 7 1 57935 0.1248 0.4482 0.34943 2017 7 2 57936 0.1265 0.4481 0.34881 2017 7 3 57937 0.1282 0.4479 0.34828 2017 7 4 57938 0.1298 0.4477 0.34786 2017 7 5 57939 0.1315 0.4474 0.34755 2017 7 6 57940 0.1331 0.4471 0.34736 2017 7 7 57941 0.1348 0.4468 0.34727 2017 7 8 57942 0.1364 0.4465 0.34725 2017 7 9 57943 0.1380 0.4462 0.34727 2017 7 10 57944 0.1396 0.4458 0.34727 2017 7 11 57945 0.1412 0.4454 0.34723 2017 7 12 57946 0.1428 0.4450 0.34710 2017 7 13 57947 0.1444 0.4445 0.34687 2017 7 14 57948 0.1460 0.4441 0.34652 2017 7 15 57949 0.1475 0.4436 0.34608 2017 7 16 57950 0.1491 0.4431 0.34558 2017 7 17 57951 0.1506 0.4425 0.34508 2017 7 18 57952 0.1521 0.4420 0.34462 2017 7 19 57953 0.1537 0.4414 0.34425 2017 7 20 57954 0.1551 0.4408 0.34401 2017 7 21 57955 0.1566 0.4401 0.34387 2017 7 22 57956 0.1581 0.4395 0.34379 2017 7 23 57957 0.1595 0.4388 0.34368 2017 7 24 57958 0.1610 0.4381 0.34347 2017 7 25 57959 0.1624 0.4374 0.34313 2017 7 26 57960 0.1638 0.4366 0.34267 2017 7 27 57961 0.1652 0.4359 0.34212 2017 7 28 57962 0.1666 0.4351 0.34155 2017 7 29 57963 0.1679 0.4343 0.34101 2017 7 30 57964 0.1692 0.4335 0.34055 2017 7 31 57965 0.1706 0.4326 0.34019 2017 8 1 57966 0.1719 0.4317 0.33994 2017 8 2 57967 0.1731 0.4309 0.33979 2017 8 3 57968 0.1744 0.4300 0.33970 2017 8 4 57969 0.1756 0.4290 0.33964 2017 8 5 57970 0.1769 0.4281 0.33956 2017 8 6 57971 0.1781 0.4271 0.33941 2017 8 7 57972 0.1792 0.4262 0.33916 2017 8 8 57973 0.1804 0.4252 0.33875 2017 8 9 57974 0.1815 0.4241 0.33816 2017 8 10 57975 0.1826 0.4231 0.33740 2017 8 11 57976 0.1837 0.4221 0.33648 2017 8 12 57977 0.1848 0.4210 0.33544 2017 8 13 57978 0.1859 0.4199 0.33437 2017 8 14 57979 0.1869 0.4188 0.33334 2017 8 15 57980 0.1879 0.4177 0.33240 2017 8 16 57981 0.1889 0.4166 0.33159 2017 8 17 57982 0.1898 0.4154 0.33091 2017 8 18 57983 0.1908 0.4143 0.33033 2017 8 19 57984 0.1917 0.4131 0.32980 2017 8 20 57985 0.1926 0.4119 0.32922 2017 8 21 57986 0.1934 0.4107 0.32858 2017 8 22 57987 0.1943 0.4095 0.32784 2017 8 23 57988 0.1951 0.4083 0.32698 2017 8 24 57989 0.1959 0.4070 0.32606 2017 8 25 57990 0.1966 0.4058 0.32511 2017 8 26 57991 0.1974 0.4045 0.32426 2017 8 27 57992 0.1981 0.4032 0.32341 2017 8 28 57993 0.1988 0.4020 0.32259 2017 8 29 57994 0.1994 0.4007 0.32189 2017 8 30 57995 0.2000 0.3994 0.32127 2017 8 31 57996 0.2007 0.3980 0.32066 2017 9 1 57997 0.2012 0.3967 0.32007 2017 9 2 57998 0.2018 0.3954 0.31943 2017 9 3 57999 0.2023 0.3940 0.31864 2017 9 4 58000 0.2028 0.3927 0.31773 2017 9 5 58001 0.2033 0.3913 0.31660 2017 9 6 58002 0.2037 0.3900 0.31527 2017 9 7 58003 0.2042 0.3886 0.31378 2017 9 8 58004 0.2046 0.3872 0.31213 2017 9 9 58005 0.2049 0.3859 0.31037 2017 9 10 58006 0.2053 0.3845 0.30861 2017 9 11 58007 0.2056 0.3831 0.30694 2017 9 12 58008 0.2059 0.3817 0.30534 2017 9 13 58009 0.2061 0.3803 0.30378 2017 9 14 58010 0.2064 0.3789 0.30231 2017 9 15 58011 0.2066 0.3775 0.30085 2017 9 16 58012 0.2067 0.3760 0.29935 2017 9 17 58013 0.2069 0.3746 0.29768 2017 9 18 58014 0.2070 0.3732 0.29582 2017 9 19 58015 0.2071 0.3718 0.29383 2017 9 20 58016 0.2072 0.3704 0.29180 2017 9 21 58017 0.2072 0.3690 0.28983 2017 9 22 58018 0.2072 0.3675 0.28792 2017 9 23 58019 0.2072 0.3661 0.28613 2017 9 24 58020 0.2072 0.3647 0.28442 2017 9 25 58021 0.2071 0.3633 0.28278 2017 9 26 58022 0.2070 0.3618 0.28126 2017 9 27 58023 0.2069 0.3604 0.27990 2017 9 28 58024 0.2067 0.3590 0.27863 2017 9 29 58025 0.2065 0.3576 0.27743 2017 9 30 58026 0.2063 0.3562 0.27627 2017 10 1 58027 0.2061 0.3548 0.27506 2017 10 2 58028 0.2058 0.3534 0.27375 2017 10 3 58029 0.2056 0.3520 0.27219 2017 10 4 58030 0.2052 0.3506 0.27051 2017 10 5 58031 0.2049 0.3492 0.26861 2017 10 6 58032 0.2045 0.3478 0.26664 2017 10 7 58033 0.2042 0.3464 0.26464 2017 10 8 58034 0.2037 0.3451 0.26269 2017 10 9 58035 0.2033 0.3437 0.26090 2017 10 10 58036 0.2028 0.3423 0.25927 2017 10 11 58037 0.2023 0.3410 0.25784 2017 10 12 58038 0.2018 0.3396 0.25640 2017 10 13 58039 0.2013 0.3383 0.25498 2017 10 14 58040 0.2007 0.3370 0.25349 2017 10 15 58041 0.2001 0.3357 0.25196 2017 10 16 58042 0.1995 0.3343 0.25038 2017 10 17 58043 0.1989 0.3330 0.24871 2017 10 18 58044 0.1982 0.3318 0.24696 2017 10 19 58045 0.1975 0.3305 0.24513 2017 10 20 58046 0.1968 0.3292 0.24338 2017 10 21 58047 0.1961 0.3279 0.24178 2017 10 22 58048 0.1953 0.3267 0.24028 2017 10 23 58049 0.1945 0.3255 0.23889 2017 10 24 58050 0.1937 0.3242 0.23757 2017 10 25 58051 0.1929 0.3230 0.23645 2017 10 26 58052 0.1921 0.3218 0.23533 2017 10 27 58053 0.1912 0.3206 0.23418 2017 10 28 58054 0.1903 0.3195 0.23299 2017 10 29 58055 0.1894 0.3183 0.23163 2017 10 30 58056 0.1885 0.3172 0.23010 2017 10 31 58057 0.1875 0.3160 0.22839 2017 11 1 58058 0.1866 0.3149 0.22654 2017 11 2 58059 0.1856 0.3138 0.22455 2017 11 3 58060 0.1846 0.3128 0.22246 2017 11 4 58061 0.1836 0.3117 0.22051 2017 11 5 58062 0.1825 0.3106 0.21855 2017 11 6 58063 0.1815 0.3096 0.21686 2017 11 7 58064 0.1804 0.3086 0.21524 2017 11 8 58065 0.1793 0.3076 0.21368 2017 11 9 58066 0.1782 0.3066 0.21206 2017 11 10 58067 0.1770 0.3056 0.21039 2017 11 11 58068 0.1759 0.3047 0.20861 2017 11 12 58069 0.1747 0.3037 0.20673 2017 11 13 58070 0.1735 0.3028 0.20474 2017 11 14 58071 0.1724 0.3019 0.20273 2017 11 15 58072 0.1711 0.3011 0.20066 2017 11 16 58073 0.1699 0.3002 0.19864 2017 11 17 58074 0.1687 0.2994 0.19674 2017 11 18 58075 0.1674 0.2985 0.19507 2017 11 19 58076 0.1662 0.2977 0.19349 2017 11 20 58077 0.1649 0.2970 0.19193 2017 11 21 58078 0.1636 0.2962 0.19055 2017 11 22 58079 0.1623 0.2955 0.18909 2017 11 23 58080 0.1610 0.2947 0.18776 2017 11 24 58081 0.1597 0.2940 0.18643 2017 11 25 58082 0.1583 0.2934 0.18502 2017 11 26 58083 0.1570 0.2927 0.18350 2017 11 27 58084 0.1556 0.2921 0.18185 2017 11 28 58085 0.1543 0.2915 0.18000 2017 11 29 58086 0.1529 0.2909 0.17803 2017 11 30 58087 0.1515 0.2903 0.17602 2017 12 1 58088 0.1501 0.2897 0.17399 2017 12 2 58089 0.1487 0.2892 0.17194 2017 12 3 58090 0.1473 0.2887 0.17013 2017 12 4 58091 0.1459 0.2882 0.16838 2017 12 5 58092 0.1445 0.2877 0.16667 2017 12 6 58093 0.1431 0.2873 0.16496 2017 12 7 58094 0.1416 0.2869 0.16328 2017 12 8 58095 0.1402 0.2865 0.16156 2017 12 9 58096 0.1388 0.2861 0.15974 2017 12 10 58097 0.1373 0.2858 0.15788 2017 12 11 58098 0.1359 0.2854 0.15608 2017 12 12 58099 0.1344 0.2851 0.15438 2017 12 13 58100 0.1330 0.2848 0.15262 2017 12 14 58101 0.1315 0.2846 0.15097 2017 12 15 58102 0.1301 0.2843 0.14947 2017 12 16 58103 0.1286 0.2841 0.14807 2017 12 17 58104 0.1271 0.2839 0.14685 2017 12 18 58105 0.1257 0.2838 0.14574 2017 12 19 58106 0.1242 0.2836 0.14474 2017 12 20 58107 0.1228 0.2835 0.14376 2017 12 21 58108 0.1213 0.2834 0.14293 2017 12 22 58109 0.1198 0.2833 0.14202 2017 12 23 58110 0.1184 0.2832 0.14103 2017 12 24 58111 0.1169 0.2832 0.13990 2017 12 25 58112 0.1155 0.2832 0.13863 2017 12 26 58113 0.1140 0.2832 0.13721 2017 12 27 58114 0.1126 0.2832 0.13563 2017 12 28 58115 0.1112 0.2833 0.13404 2017 12 29 58116 0.1097 0.2834 0.13231 2017 12 30 58117 0.1083 0.2835 0.13070 2017 12 31 58118 0.1069 0.2836 0.12909 2018 1 1 58119 0.1055 0.2838 0.12756 2018 1 2 58120 0.1040 0.2839 0.12612 2018 1 3 58121 0.1026 0.2841 0.12478 2018 1 4 58122 0.1012 0.2843 0.12324 2018 1 5 58123 0.0998 0.2846 0.12181 2018 1 6 58124 0.0985 0.2848 0.12030 2018 1 7 58125 0.0971 0.2851 0.11874 2018 1 8 58126 0.0957 0.2854 0.11720 2018 1 9 58127 0.0944 0.2857 0.11566 2018 1 10 58128 0.0930 0.2861 0.11426 2018 1 11 58129 0.0917 0.2864 0.11298 2018 1 12 58130 0.0903 0.2868 0.11169 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) 57744 -99.63 0.11 -9.05 0.15 57745 -99.61 0.11 -9.00 0.15 57746 -99.76 0.11 -8.96 0.15 57747 -99.97 0.30 -8.92 0.15 57748 -100.04 0.30 -8.87 0.05 57749 -99.97 0.30 -8.87 0.05 57750 -99.85 0.30 -8.91 0.05 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57744 -0.016 0.044 -0.140 0.150 57745 -0.008 0.044 -0.124 0.150 57746 -0.016 0.044 -0.104 0.150 57747 -0.037 0.119 -0.119 0.150 57748 -0.046 0.119 -0.128 0.050 57749 -0.043 0.119 -0.134 0.050 57750 -0.029 0.119 -0.112 0.050 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).