********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 July 2011 Vol. XXIV No. 029 ______________________________________________________________________ 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 = -0.3 seconds beginning 12 May 2011 at 0000 UTC Beginning 1 January 2009: TAI-UTC(BIPM) = 34.000 000 seconds ********************************************************************** * There will NOT be a leap second introduced * * in UTC on 31 December 2011. * ********************************************************************** ________________________________________________________________________ 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 11 7 15 55757 0.07065 .00010 0.44515 .00009 -0.291573 0.000014 11 7 16 55758 0.07243 .00009 0.44564 .00009 -0.291380 0.000016 11 7 17 55759 0.07445 .00009 0.44638 .00009 -0.291326 0.000017 11 7 18 55760 0.07657 .00009 0.44716 .00009 -0.291420 0.000013 11 7 19 55761 0.07874 .00009 0.44762 .00009 -0.291625 0.000013 11 7 20 55762 0.08120 .00009 0.44791 .00009 -0.291842 0.000012 11 7 21 55763 0.08383 .00009 0.44826 .00009 -0.291988 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 = 0.0879 + 0.0428 cos A + 0.1101 sin A - 0.0485 cos C + 0.0085 sin C y = 0.3372 + 0.1018 cos A - 0.0372 sin A + 0.0085 cos C + 0.0485 sin C UT1-UTC = -0.3056 - 0.00069 (MJD - 55771) - (UT2-UT1) where A = 2*pi*(MJD-55763)/365.25 and C = 2*pi*(MJD-55763)/435. TAI-UTC(MJD 55764) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55763)**0.80 S t = 0.00025 (MJD-55763)**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) 2011 7 22 55764 0.0861 0.4486 -0.29205 2011 7 23 55765 0.0884 0.4489 -0.29203 2011 7 24 55766 0.0904 0.4490 -0.29191 2011 7 25 55767 0.0924 0.4491 -0.29165 2011 7 26 55768 0.0942 0.4491 -0.29125 2011 7 27 55769 0.0960 0.4490 -0.29077 2011 7 28 55770 0.0978 0.4488 -0.29029 2011 7 29 55771 0.0996 0.4486 -0.28990 2011 7 30 55772 0.1014 0.4484 -0.28969 2011 7 31 55773 0.1031 0.4482 -0.28973 2011 8 1 55774 0.1048 0.4479 -0.29007 2011 8 2 55775 0.1065 0.4476 -0.29062 2011 8 3 55776 0.1081 0.4473 -0.29127 2011 8 4 55777 0.1097 0.4469 -0.29189 2011 8 5 55778 0.1113 0.4465 -0.29235 2011 8 6 55779 0.1129 0.4460 -0.29261 2011 8 7 55780 0.1145 0.4456 -0.29265 2011 8 8 55781 0.1160 0.4451 -0.29252 2011 8 9 55782 0.1175 0.4445 -0.29229 2011 8 10 55783 0.1191 0.4440 -0.29205 2011 8 11 55784 0.1206 0.4434 -0.29187 2011 8 12 55785 0.1220 0.4428 -0.29179 2011 8 13 55786 0.1235 0.4422 -0.29184 2011 8 14 55787 0.1250 0.4416 -0.29204 2011 8 15 55788 0.1264 0.4409 -0.29232 2011 8 16 55789 0.1278 0.4403 -0.29266 2011 8 17 55790 0.1292 0.4396 -0.29298 2011 8 18 55791 0.1306 0.4388 -0.29327 2011 8 19 55792 0.1320 0.4381 -0.29348 2011 8 20 55793 0.1333 0.4373 -0.29361 2011 8 21 55794 0.1347 0.4366 -0.29367 2011 8 22 55795 0.1360 0.4358 -0.29365 2011 8 23 55796 0.1373 0.4349 -0.29361 2011 8 24 55797 0.1385 0.4341 -0.29360 2011 8 25 55798 0.1398 0.4332 -0.29369 2011 8 26 55799 0.1411 0.4324 -0.29395 2011 8 27 55800 0.1423 0.4315 -0.29446 2011 8 28 55801 0.1435 0.4306 -0.29524 2011 8 29 55802 0.1447 0.4296 -0.29627 2011 8 30 55803 0.1458 0.4287 -0.29747 2011 8 31 55804 0.1470 0.4277 -0.29870 2011 9 1 55805 0.1481 0.4267 -0.29984 2011 9 2 55806 0.1492 0.4257 -0.30078 2011 9 3 55807 0.1503 0.4247 -0.30151 2011 9 4 55808 0.1514 0.4237 -0.30206 2011 9 5 55809 0.1524 0.4227 -0.30250 2011 9 6 55810 0.1534 0.4216 -0.30291 2011 9 7 55811 0.1544 0.4206 -0.30338 2011 9 8 55812 0.1554 0.4195 -0.30395 2011 9 9 55813 0.1564 0.4184 -0.30464 2011 9 10 55814 0.1573 0.4173 -0.30546 2011 9 11 55815 0.1582 0.4161 -0.30638 2011 9 12 55816 0.1591 0.4150 -0.30735 2011 9 13 55817 0.1600 0.4139 -0.30831 2011 9 14 55818 0.1608 0.4127 -0.30923 2011 9 15 55819 0.1616 0.4115 -0.31007 2011 9 16 55820 0.1625 0.4104 -0.31080 2011 9 17 55821 0.1632 0.4092 -0.31142 2011 9 18 55822 0.1640 0.4080 -0.31194 2011 9 19 55823 0.1647 0.4068 -0.31240 2011 9 20 55824 0.1654 0.4055 -0.31284 2011 9 21 55825 0.1661 0.4043 -0.31331 2011 9 22 55826 0.1668 0.4031 -0.31390 2011 9 23 55827 0.1674 0.4018 -0.31467 2011 9 24 55828 0.1680 0.4006 -0.31568 2011 9 25 55829 0.1686 0.3993 -0.31694 2011 9 26 55830 0.1692 0.3981 -0.31841 2011 9 27 55831 0.1698 0.3968 -0.32000 2011 9 28 55832 0.1703 0.3955 -0.32157 2011 9 29 55833 0.1708 0.3942 -0.32300 2011 9 30 55834 0.1713 0.3929 -0.32420 2011 10 1 55835 0.1717 0.3916 -0.32517 2011 10 2 55836 0.1722 0.3903 -0.32597 2011 10 3 55837 0.1726 0.3890 -0.32667 2011 10 4 55838 0.1729 0.3877 -0.32738 2011 10 5 55839 0.1733 0.3864 -0.32816 2011 10 6 55840 0.1736 0.3851 -0.32904 2011 10 7 55841 0.1739 0.3837 -0.33002 2011 10 8 55842 0.1742 0.3824 -0.33109 2011 10 9 55843 0.1745 0.3811 -0.33222 2011 10 10 55844 0.1747 0.3798 -0.33337 2011 10 11 55845 0.1750 0.3784 -0.33448 2011 10 12 55846 0.1752 0.3771 -0.33552 2011 10 13 55847 0.1753 0.3758 -0.33645 2011 10 14 55848 0.1755 0.3744 -0.33728 2011 10 15 55849 0.1756 0.3731 -0.33800 2011 10 16 55850 0.1757 0.3717 -0.33865 2011 10 17 55851 0.1758 0.3704 -0.33927 2011 10 18 55852 0.1758 0.3691 -0.33991 2011 10 19 55853 0.1759 0.3677 -0.34063 2011 10 20 55854 0.1759 0.3664 -0.34148 2011 10 21 55855 0.1759 0.3651 -0.34253 2011 10 22 55856 0.1758 0.3638 -0.34381 2011 10 23 55857 0.1758 0.3624 -0.34529 2011 10 24 55858 0.1757 0.3611 -0.34692 2011 10 25 55859 0.1756 0.3598 -0.34861 2011 10 26 55860 0.1755 0.3585 -0.35021 2011 10 27 55861 0.1753 0.3572 -0.35164 2011 10 28 55862 0.1752 0.3559 -0.35284 2011 10 29 55863 0.1750 0.3546 -0.35383 2011 10 30 55864 0.1748 0.3533 -0.35470 2011 10 31 55865 0.1745 0.3520 -0.35553 2011 11 1 55866 0.1743 0.3507 -0.35641 2011 11 2 55867 0.1740 0.3494 -0.35737 2011 11 3 55868 0.1737 0.3481 -0.35843 2011 11 4 55869 0.1734 0.3469 -0.35956 2011 11 5 55870 0.1731 0.3456 -0.36074 2011 11 6 55871 0.1727 0.3443 -0.36192 2011 11 7 55872 0.1724 0.3431 -0.36315 2011 11 8 55873 0.1720 0.3419 -0.36430 2011 11 9 55874 0.1715 0.3406 -0.36536 2011 11 10 55875 0.1711 0.3394 -0.36629 2011 11 11 55876 0.1707 0.3382 -0.36711 2011 11 12 55877 0.1702 0.3370 -0.36784 2011 11 13 55878 0.1697 0.3358 -0.36852 2011 11 14 55879 0.1692 0.3346 -0.36918 2011 11 15 55880 0.1687 0.3334 -0.36990 2011 11 16 55881 0.1681 0.3323 -0.37073 2011 11 17 55882 0.1676 0.3311 -0.37170 2011 11 18 55883 0.1670 0.3300 -0.37286 2011 11 19 55884 0.1664 0.3288 -0.37421 2011 11 20 55885 0.1658 0.3277 -0.37570 2011 11 21 55886 0.1652 0.3266 -0.37727 2011 11 22 55887 0.1645 0.3255 -0.37882 2011 11 23 55888 0.1639 0.3244 -0.38023 2011 11 24 55889 0.1632 0.3233 -0.38145 2011 11 25 55890 0.1625 0.3222 -0.38247 2011 11 26 55891 0.1618 0.3212 -0.38334 2011 11 27 55892 0.1611 0.3201 -0.38413 2011 11 28 55893 0.1604 0.3191 -0.38493 2011 11 29 55894 0.1596 0.3181 -0.38582 2011 11 30 55895 0.1589 0.3171 -0.38680 2011 12 1 55896 0.1581 0.3161 -0.38786 2011 12 2 55897 0.1573 0.3151 -0.38896 2011 12 3 55898 0.1565 0.3142 -0.39006 2011 12 4 55899 0.1557 0.3132 -0.39112 2011 12 5 55900 0.1549 0.3123 -0.39210 2011 12 6 55901 0.1540 0.3114 -0.39298 2011 12 7 55902 0.1532 0.3105 -0.39373 2011 12 8 55903 0.1523 0.3096 -0.39436 2011 12 9 55904 0.1514 0.3087 -0.39489 2011 12 10 55905 0.1506 0.3078 -0.39535 2011 12 11 55906 0.1497 0.3070 -0.39580 2011 12 12 55907 0.1488 0.3062 -0.39627 2011 12 13 55908 0.1479 0.3054 -0.39684 2011 12 14 55909 0.1469 0.3046 -0.39755 2011 12 15 55910 0.1460 0.3038 -0.39842 2011 12 16 55911 0.1451 0.3030 -0.39946 2011 12 17 55912 0.1441 0.3022 -0.40064 2011 12 18 55913 0.1432 0.3015 -0.40189 2011 12 19 55914 0.1422 0.3008 -0.40313 2011 12 20 55915 0.1412 0.3001 -0.40427 2011 12 21 55916 0.1403 0.2994 -0.40526 2011 12 22 55917 0.1393 0.2987 -0.40606 2011 12 23 55918 0.1383 0.2981 -0.40670 2011 12 24 55919 0.1373 0.2974 -0.40725 2011 12 25 55920 0.1363 0.2968 -0.40780 2011 12 26 55921 0.1353 0.2962 -0.40842 2011 12 27 55922 0.1343 0.2956 -0.40915 2011 12 28 55923 0.1332 0.2950 -0.40998 2011 12 29 55924 0.1322 0.2945 -0.41088 2011 12 30 55925 0.1312 0.2939 -0.41180 2011 12 31 55926 0.1302 0.2934 -0.41270 2012 1 1 55927 0.1291 0.2929 -0.41352 2012 1 2 55928 0.1281 0.2924 -0.41424 2012 1 3 55929 0.1271 0.2919 -0.41484 2012 1 4 55930 0.1260 0.2915 -0.41532 2012 1 5 55931 0.1250 0.2910 -0.41570 2012 1 6 55932 0.1239 0.2906 -0.41599 2012 1 7 55933 0.1229 0.2902 -0.41626 2012 1 8 55934 0.1218 0.2898 -0.41655 2012 1 9 55935 0.1208 0.2895 -0.41694 2012 1 10 55936 0.1197 0.2891 -0.41747 2012 1 11 55937 0.1187 0.2888 -0.41817 2012 1 12 55938 0.1176 0.2884 -0.41907 2012 1 13 55939 0.1166 0.2881 -0.42011 2012 1 14 55940 0.1155 0.2879 -0.42124 2012 1 15 55941 0.1145 0.2876 -0.42237 2012 1 16 55942 0.1135 0.2873 -0.42342 2012 1 17 55943 0.1124 0.2871 -0.42431 2012 1 18 55944 0.1114 0.2869 -0.42503 2012 1 19 55945 0.1103 0.2867 -0.42560 2012 1 20 55946 0.1093 0.2865 -0.42606 2012 1 21 55947 0.1083 0.2863 -0.42651 2012 1 22 55948 0.1072 0.2861 -0.42702 2012 1 23 55949 0.1062 0.2860 -0.42763 2012 1 24 55950 0.1052 0.2859 -0.42838 2012 1 25 55951 0.1042 0.2858 -0.42923 2012 1 26 55952 0.1031 0.2857 -0.43013 2012 1 27 55953 0.1021 0.2856 -0.43104 2012 1 28 55954 0.1011 0.2855 -0.43190 2012 1 29 55955 0.1001 0.2855 -0.43268 2012 1 30 55956 0.0991 0.2855 -0.43335 2012 1 31 55957 0.0981 0.2854 -0.43390 2012 2 1 55958 0.0972 0.2854 -0.43434 2012 2 2 55959 0.0962 0.2855 -0.43470 2012 2 3 55960 0.0952 0.2855 -0.43502 2012 2 4 55961 0.0943 0.2855 -0.43535 2012 2 5 55962 0.0933 0.2856 -0.43576 2012 2 6 55963 0.0924 0.2857 -0.43630 2012 2 7 55964 0.0914 0.2857 -0.43703 2012 2 8 55965 0.0905 0.2858 -0.43797 2012 2 9 55966 0.0896 0.2860 -0.43909 2012 2 10 55967 0.0886 0.2861 -0.44034 2012 2 11 55968 0.0877 0.2862 -0.44163 2012 2 12 55969 0.0868 0.2864 -0.44284 2012 2 13 55970 0.0859 0.2866 -0.44392 2012 2 14 55971 0.0850 0.2867 -0.44480 2012 2 15 55972 0.0842 0.2869 -0.44550 2012 2 16 55973 0.0833 0.2871 -0.44607 2012 2 17 55974 0.0825 0.2874 -0.44658 2012 2 18 55975 0.0816 0.2876 -0.44712 2012 2 19 55976 0.0808 0.2878 -0.44776 2012 2 20 55977 0.0800 0.2881 -0.44855 2012 2 21 55978 0.0791 0.2884 -0.44949 2012 2 22 55979 0.0783 0.2887 -0.45053 2012 2 23 55980 0.0775 0.2889 -0.45164 2012 2 24 55981 0.0768 0.2893 -0.45272 2012 2 25 55982 0.0760 0.2896 -0.45374 2012 2 26 55983 0.0752 0.2899 -0.45466 2012 2 27 55984 0.0745 0.2902 -0.45548 2012 2 28 55985 0.0737 0.2906 -0.45620 2012 2 29 55986 0.0730 0.2909 -0.45679 2012 3 1 55987 0.0723 0.2913 -0.45727 2012 3 2 55988 0.0716 0.2917 -0.45772 2012 3 3 55989 0.0709 0.2921 -0.45822 2012 3 4 55990 0.0702 0.2925 -0.45884 2012 3 5 55991 0.0696 0.2929 -0.45964 2012 3 6 55992 0.0689 0.2933 -0.46059 2012 3 7 55993 0.0683 0.2937 -0.46179 2012 3 8 55994 0.0677 0.2941 -0.46324 2012 3 9 55995 0.0670 0.2946 -0.46478 2012 3 10 55996 0.0664 0.2950 -0.46629 2012 3 11 55997 0.0658 0.2955 -0.46762 2012 3 12 55998 0.0653 0.2960 -0.46878 2012 3 13 55999 0.0647 0.2964 -0.46978 2012 3 14 56000 0.0642 0.2969 -0.47063 2012 3 15 56001 0.0636 0.2974 -0.47146 2012 3 16 56002 0.0631 0.2979 -0.47237 2012 3 17 56003 0.0626 0.2984 -0.47342 2012 3 18 56004 0.0621 0.2989 -0.47456 2012 3 19 56005 0.0616 0.2994 -0.47582 2012 3 20 56006 0.0611 0.2999 -0.47715 2012 3 21 56007 0.0607 0.3004 -0.47850 2012 3 22 56008 0.0602 0.3010 -0.47981 2012 3 23 56009 0.0598 0.3015 -0.48109 2012 3 24 56010 0.0594 0.3020 -0.48232 2012 3 25 56011 0.0590 0.3026 -0.48346 2012 3 26 56012 0.0586 0.3031 -0.48448 2012 3 27 56013 0.0582 0.3037 -0.48538 2012 3 28 56014 0.0578 0.3042 -0.48625 2012 3 29 56015 0.0575 0.3048 -0.48708 2012 3 30 56016 0.0572 0.3054 -0.48787 2012 3 31 56017 0.0568 0.3059 -0.48871 2012 4 1 56018 0.0565 0.3065 -0.48969 2012 4 2 56019 0.0562 0.3071 -0.49087 2012 4 3 56020 0.0559 0.3076 -0.49224 2012 4 4 56021 0.0557 0.3082 -0.49382 2012 4 5 56022 0.0554 0.3088 -0.49555 2012 4 6 56023 0.0552 0.3094 -0.49736 2012 4 7 56024 0.0549 0.3099 -0.49915 2012 4 8 56025 0.0547 0.3105 -0.50078 2012 4 9 56026 0.0545 0.3111 -0.50223 2012 4 10 56027 0.0543 0.3117 -0.50347 2012 4 11 56028 0.0542 0.3123 -0.50457 2012 4 12 56029 0.0540 0.3129 -0.50560 2012 4 13 56030 0.0538 0.3135 -0.50660 2012 4 14 56031 0.0537 0.3140 -0.50766 2012 4 15 56032 0.0536 0.3146 -0.50881 2012 4 16 56033 0.0535 0.3152 -0.51008 2012 4 17 56034 0.0534 0.3158 -0.51148 2012 4 18 56035 0.0533 0.3164 -0.51290 2012 4 19 56036 0.0532 0.3170 -0.51434 2012 4 20 56037 0.0531 0.3175 -0.51571 2012 4 21 56038 0.0531 0.3181 -0.51693 2012 4 22 56039 0.0530 0.3187 -0.51800 2012 4 23 56040 0.0530 0.3193 -0.51894 2012 4 24 56041 0.0530 0.3199 -0.51973 2012 4 25 56042 0.0530 0.3204 -0.52040 2012 4 26 56043 0.0530 0.3210 -0.52100 2012 4 27 56044 0.0530 0.3216 -0.52162 2012 4 28 56045 0.0530 0.3221 -0.52231 2012 4 29 56046 0.0530 0.3227 -0.52315 2012 4 30 56047 0.0531 0.3233 -0.52419 2012 5 1 56048 0.0531 0.3238 -0.52542 2012 5 2 56049 0.0532 0.3244 -0.52681 2012 5 3 56050 0.0533 0.3249 -0.52831 2012 5 4 56051 0.0534 0.3255 -0.52984 2012 5 5 56052 0.0535 0.3260 -0.53128 2012 5 6 56053 0.0536 0.3266 -0.53257 2012 5 7 56054 0.0537 0.3271 -0.53369 2012 5 8 56055 0.0538 0.3276 -0.53462 2012 5 9 56056 0.0540 0.3281 -0.53548 2012 5 10 56057 0.0541 0.3287 -0.53635 2012 5 11 56058 0.0543 0.3292 -0.53733 2012 5 12 56059 0.0544 0.3297 -0.53845 2012 5 13 56060 0.0546 0.3302 -0.53963 2012 5 14 56061 0.0548 0.3307 -0.54088 2012 5 15 56062 0.0550 0.3312 -0.54210 2012 5 16 56063 0.0552 0.3317 -0.54324 2012 5 17 56064 0.0554 0.3322 -0.54428 2012 5 18 56065 0.0556 0.3326 -0.54516 2012 5 19 56066 0.0558 0.3331 -0.54588 2012 5 20 56067 0.0560 0.3336 -0.54645 2012 5 21 56068 0.0563 0.3340 -0.54685 2012 5 22 56069 0.0565 0.3345 -0.54709 2012 5 23 56070 0.0567 0.3349 -0.54725 2012 5 24 56071 0.0570 0.3354 -0.54730 2012 5 25 56072 0.0573 0.3358 -0.54736 2012 5 26 56073 0.0575 0.3363 -0.54755 2012 5 27 56074 0.0578 0.3367 -0.54782 2012 5 28 56075 0.0581 0.3371 -0.54824 2012 5 29 56076 0.0583 0.3375 -0.54881 2012 5 30 56077 0.0586 0.3379 -0.54949 2012 5 31 56078 0.0589 0.3383 -0.55018 2012 6 1 56079 0.0592 0.3387 -0.55075 2012 6 2 56080 0.0595 0.3391 -0.55116 2012 6 3 56081 0.0598 0.3394 -0.55134 2012 6 4 56082 0.0601 0.3398 -0.55133 2012 6 5 56083 0.0604 0.3402 -0.55128 2012 6 6 56084 0.0608 0.3405 -0.55123 2012 6 7 56085 0.0611 0.3409 -0.55126 2012 6 8 56086 0.0614 0.3412 -0.55138 2012 6 9 56087 0.0617 0.3415 -0.55158 2012 6 10 56088 0.0621 0.3419 -0.55186 2012 6 11 56089 0.0624 0.3422 -0.55212 2012 6 12 56090 0.0627 0.3425 -0.55235 2012 6 13 56091 0.0630 0.3428 -0.55253 2012 6 14 56092 0.0634 0.3431 -0.55261 2012 6 15 56093 0.0637 0.3434 -0.55256 2012 6 16 56094 0.0641 0.3437 -0.55242 2012 6 17 56095 0.0644 0.3439 -0.55216 2012 6 18 56096 0.0647 0.3442 -0.55179 2012 6 19 56097 0.0651 0.3445 -0.55137 2012 6 20 56098 0.0654 0.3447 -0.55096 2012 6 21 56099 0.0658 0.3449 -0.55065 2012 6 22 56100 0.0661 0.3452 -0.55048 2012 6 23 56101 0.0664 0.3454 -0.55049 2012 6 24 56102 0.0668 0.3456 -0.55067 2012 6 25 56103 0.0671 0.3458 -0.55100 2012 6 26 56104 0.0675 0.3461 -0.55142 2012 6 27 56105 0.0678 0.3462 -0.55186 2012 6 28 56106 0.0681 0.3464 -0.55225 2012 6 29 56107 0.0685 0.3466 -0.55252 2012 6 30 56108 0.0688 0.3468 -0.55270 2012 7 1 56109 0.0692 0.3470 -0.55270 2012 7 2 56110 0.0695 0.3471 -0.55255 2012 7 3 56111 0.0698 0.3473 -0.55241 2012 7 4 56112 0.0701 0.3474 -0.55231 2012 7 5 56113 0.0705 0.3476 -0.55226 2012 7 6 56114 0.0708 0.3477 -0.55233 2012 7 7 56115 0.0711 0.3478 -0.55251 2012 7 8 56116 0.0714 0.3480 -0.55271 2012 7 9 56117 0.0717 0.3481 -0.55293 2012 7 10 56118 0.0720 0.3482 -0.55312 2012 7 11 56119 0.0723 0.3483 -0.55320 2012 7 12 56120 0.0726 0.3484 -0.55314 2012 7 13 56121 0.0729 0.3485 -0.55293 2012 7 14 56122 0.0732 0.3486 -0.55258 2012 7 15 56123 0.0735 0.3487 -0.55218 2012 7 16 56124 0.0738 0.3487 -0.55175 2012 7 17 56125 0.0741 0.3488 -0.55129 2012 7 18 56126 0.0744 0.3489 -0.55090 2012 7 19 56127 0.0746 0.3489 -0.55061 2012 7 20 56128 0.0749 0.3490 -0.55046 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) 55744 -71.01 0.20 -11.21 0.12 55745 -70.90 0.20 -11.13 0.12 55746 -71.10 0.17 -10.93 0.10 55747 -71.63 0.30 -10.68 0.04 55748 -72.31 0.30 -10.48 0.04 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55744 -0.084 0.080 -0.014 0.120 55745 -0.109 0.080 0.027 0.120 55746 -0.152 0.068 0.053 0.100 55747 -0.204 0.119 0.062 0.040 55748 -0.256 0.119 0.075 0.040 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).