********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 19 May 2011 Vol. XXIV No. 020 ______________________________________________________________________ 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 ********************************************************************** * As of Bulletin A Vol. XXIV, No. 019, on 19 May 2011, we have * * incorporated the new GSI VLBI intensive solution gsi2011a.eopi. * * The effect appears to be less than 10 us in UT1-UTC. * ********************************************************************** ________________________________________________________________________ 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 5 13 55694 -.03654 .00010 0.36826 .00010 -0.258170 0.000009 11 5 14 55695 -.03473 .00009 0.37121 .00010 -0.259987 0.000008 11 5 15 55696 -.03337 .00010 0.37410 .00010 -0.261802 0.000009 11 5 16 55697 -.03252 .00010 0.37637 .00010 -0.263444 0.000010 11 5 17 55698 -.03189 .00009 0.37811 .00010 -0.264834 0.000010 11 5 18 55699 -.03126 .00009 0.37993 .00010 -0.266002 0.000010 11 5 19 55700 -.03071 .00009 0.38172 .00009 -0.267011 0.000009 _______________________________________________________________________ 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 = 0.0857 - 0.0735 cos A + 0.0911 sin A - 0.0402 cos C - 0.0380 sin C y = 0.3336 + 0.0827 cos A + 0.0665 sin A - 0.0380 cos C + 0.0402 sin C UT1-UTC = -0.2410 - 0.00064 (MJD - 55708) - (UT2-UT1) where A = 2*pi*(MJD-55700)/365.25 and C = 2*pi*(MJD-55700)/435. TAI-UTC(MJD 55701) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55700)**0.80 S t = 0.00025 (MJD-55700)**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 5 20 55701 -0.0299 0.3834 -0.26786 2011 5 21 55702 -0.0291 0.3850 -0.26866 2011 5 22 55703 -0.0281 0.3867 -0.26948 2011 5 23 55704 -0.0271 0.3884 -0.27035 2011 5 24 55705 -0.0260 0.3901 -0.27127 2011 5 25 55706 -0.0249 0.3917 -0.27222 2011 5 26 55707 -0.0238 0.3933 -0.27319 2011 5 27 55708 -0.0227 0.3948 -0.27413 2011 5 28 55709 -0.0215 0.3963 -0.27500 2011 5 29 55710 -0.0203 0.3978 -0.27575 2011 5 30 55711 -0.0191 0.3993 -0.27638 2011 5 31 55712 -0.0178 0.4007 -0.27692 2011 6 1 55713 -0.0166 0.4022 -0.27743 2011 6 2 55714 -0.0152 0.4036 -0.27790 2011 6 3 55715 -0.0139 0.4050 -0.27838 2011 6 4 55716 -0.0126 0.4063 -0.27887 2011 6 5 55717 -0.0112 0.4077 -0.27946 2011 6 6 55718 -0.0098 0.4090 -0.28019 2011 6 7 55719 -0.0084 0.4103 -0.28108 2011 6 8 55720 -0.0070 0.4116 -0.28212 2011 6 9 55721 -0.0055 0.4128 -0.28322 2011 6 10 55722 -0.0040 0.4141 -0.28429 2011 6 11 55723 -0.0026 0.4153 -0.28524 2011 6 12 55724 -0.0011 0.4164 -0.28598 2011 6 13 55725 0.0005 0.4176 -0.28647 2011 6 14 55726 0.0020 0.4188 -0.28671 2011 6 15 55727 0.0035 0.4199 -0.28677 2011 6 16 55728 0.0051 0.4210 -0.28674 2011 6 17 55729 0.0067 0.4220 -0.28669 2011 6 18 55730 0.0082 0.4231 -0.28668 2011 6 19 55731 0.0098 0.4241 -0.28676 2011 6 20 55732 0.0114 0.4251 -0.28691 2011 6 21 55733 0.0131 0.4261 -0.28713 2011 6 22 55734 0.0147 0.4270 -0.28736 2011 6 23 55735 0.0163 0.4279 -0.28757 2011 6 24 55736 0.0180 0.4288 -0.28773 2011 6 25 55737 0.0197 0.4297 -0.28780 2011 6 26 55738 0.0213 0.4306 -0.28775 2011 6 27 55739 0.0230 0.4314 -0.28757 2011 6 28 55740 0.0247 0.4322 -0.28727 2011 6 29 55741 0.0264 0.4329 -0.28688 2011 6 30 55742 0.0281 0.4337 -0.28643 2011 7 1 55743 0.0298 0.4344 -0.28601 2011 7 2 55744 0.0316 0.4351 -0.28568 2011 7 3 55745 0.0333 0.4358 -0.28551 2011 7 4 55746 0.0350 0.4364 -0.28553 2011 7 5 55747 0.0367 0.4370 -0.28574 2011 7 6 55748 0.0385 0.4376 -0.28607 2011 7 7 55749 0.0402 0.4382 -0.28643 2011 7 8 55750 0.0420 0.4387 -0.28673 2011 7 9 55751 0.0437 0.4393 -0.28686 2011 7 10 55752 0.0455 0.4397 -0.28679 2011 7 11 55753 0.0473 0.4402 -0.28651 2011 7 12 55754 0.0490 0.4406 -0.28607 2011 7 13 55755 0.0508 0.4411 -0.28554 2011 7 14 55756 0.0525 0.4414 -0.28501 2011 7 15 55757 0.0543 0.4418 -0.28455 2011 7 16 55758 0.0561 0.4421 -0.28421 2011 7 17 55759 0.0578 0.4424 -0.28398 2011 7 18 55760 0.0596 0.4427 -0.28384 2011 7 19 55761 0.0613 0.4430 -0.28375 2011 7 20 55762 0.0631 0.4432 -0.28367 2011 7 21 55763 0.0649 0.4434 -0.28355 2011 7 22 55764 0.0666 0.4436 -0.28335 2011 7 23 55765 0.0684 0.4437 -0.28305 2011 7 24 55766 0.0701 0.4439 -0.28263 2011 7 25 55767 0.0719 0.4440 -0.28211 2011 7 26 55768 0.0736 0.4440 -0.28150 2011 7 27 55769 0.0753 0.4441 -0.28086 2011 7 28 55770 0.0771 0.4441 -0.28024 2011 7 29 55771 0.0788 0.4441 -0.27973 2011 7 30 55772 0.0805 0.4441 -0.27938 2011 7 31 55773 0.0822 0.4440 -0.27926 2011 8 1 55774 0.0839 0.4440 -0.27937 2011 8 2 55775 0.0856 0.4439 -0.27967 2011 8 3 55776 0.0873 0.4437 -0.28005 2011 8 4 55777 0.0890 0.4436 -0.28039 2011 8 5 55778 0.0906 0.4434 -0.28059 2011 8 6 55779 0.0923 0.4432 -0.28058 2011 8 7 55780 0.0939 0.4430 -0.28037 2011 8 8 55781 0.0956 0.4427 -0.27998 2011 8 9 55782 0.0972 0.4425 -0.27951 2011 8 10 55783 0.0988 0.4422 -0.27903 2011 8 11 55784 0.1005 0.4419 -0.27861 2011 8 12 55785 0.1021 0.4415 -0.27830 2011 8 13 55786 0.1036 0.4412 -0.27812 2011 8 14 55787 0.1052 0.4408 -0.27806 2011 8 15 55788 0.1068 0.4404 -0.27809 2011 8 16 55789 0.1083 0.4399 -0.27816 2011 8 17 55790 0.1099 0.4395 -0.27822 2011 8 18 55791 0.1114 0.4390 -0.27822 2011 8 19 55792 0.1129 0.4385 -0.27815 2011 8 20 55793 0.1144 0.4380 -0.27798 2011 8 21 55794 0.1159 0.4375 -0.27771 2011 8 22 55795 0.1173 0.4369 -0.27736 2011 8 23 55796 0.1188 0.4363 -0.27698 2011 8 24 55797 0.1202 0.4357 -0.27661 2011 8 25 55798 0.1217 0.4351 -0.27632 2011 8 26 55799 0.1231 0.4345 -0.27620 2011 8 27 55800 0.1245 0.4338 -0.27631 2011 8 28 55801 0.1258 0.4331 -0.27667 2011 8 29 55802 0.1272 0.4324 -0.27728 2011 8 30 55803 0.1285 0.4317 -0.27805 2011 8 31 55804 0.1298 0.4310 -0.27886 2011 9 1 55805 0.1311 0.4302 -0.27958 2011 9 2 55806 0.1324 0.4294 -0.28011 2011 9 3 55807 0.1337 0.4287 -0.28042 2011 9 4 55808 0.1350 0.4279 -0.28054 2011 9 5 55809 0.1362 0.4270 -0.28059 2011 9 6 55810 0.1374 0.4262 -0.28061 2011 9 7 55811 0.1386 0.4253 -0.28069 2011 9 8 55812 0.1398 0.4245 -0.28086 2011 9 9 55813 0.1409 0.4236 -0.28116 2011 9 10 55814 0.1421 0.4227 -0.28159 2011 9 11 55815 0.1432 0.4217 -0.28212 2011 9 12 55816 0.1443 0.4208 -0.28270 2011 9 13 55817 0.1454 0.4199 -0.28331 2011 9 14 55818 0.1464 0.4189 -0.28387 2011 9 15 55819 0.1474 0.4179 -0.28437 2011 9 16 55820 0.1485 0.4169 -0.28477 2011 9 17 55821 0.1495 0.4159 -0.28506 2011 9 18 55822 0.1504 0.4149 -0.28528 2011 9 19 55823 0.1514 0.4139 -0.28544 2011 9 20 55824 0.1523 0.4128 -0.28559 2011 9 21 55825 0.1532 0.4118 -0.28579 2011 9 22 55826 0.1541 0.4107 -0.28611 2011 9 23 55827 0.1550 0.4096 -0.28663 2011 9 24 55828 0.1558 0.4085 -0.28738 2011 9 25 55829 0.1566 0.4074 -0.28840 2011 9 26 55830 0.1574 0.4063 -0.28962 2011 9 27 55831 0.1582 0.4052 -0.29097 2011 9 28 55832 0.1590 0.4041 -0.29229 2011 9 29 55833 0.1597 0.4029 -0.29348 2011 9 30 55834 0.1604 0.4018 -0.29444 2011 10 1 55835 0.1611 0.4006 -0.29518 2011 10 2 55836 0.1618 0.3994 -0.29576 2011 10 3 55837 0.1624 0.3983 -0.29626 2011 10 4 55838 0.1630 0.3971 -0.29678 2011 10 5 55839 0.1636 0.3959 -0.29738 2011 10 6 55840 0.1642 0.3947 -0.29809 2011 10 7 55841 0.1648 0.3935 -0.29891 2011 10 8 55842 0.1653 0.3923 -0.29982 2011 10 9 55843 0.1658 0.3911 -0.30080 2011 10 10 55844 0.1663 0.3898 -0.30179 2011 10 11 55845 0.1667 0.3886 -0.30276 2011 10 12 55846 0.1672 0.3874 -0.30365 2011 10 13 55847 0.1676 0.3861 -0.30446 2011 10 14 55848 0.1680 0.3849 -0.30515 2011 10 15 55849 0.1684 0.3836 -0.30575 2011 10 16 55850 0.1687 0.3824 -0.30627 2011 10 17 55851 0.1690 0.3811 -0.30677 2011 10 18 55852 0.1693 0.3799 -0.30729 2011 10 19 55853 0.1696 0.3786 -0.30788 2011 10 20 55854 0.1699 0.3774 -0.30863 2011 10 21 55855 0.1701 0.3761 -0.30956 2011 10 22 55856 0.1703 0.3749 -0.31072 2011 10 23 55857 0.1705 0.3736 -0.31210 2011 10 24 55858 0.1707 0.3723 -0.31364 2011 10 25 55859 0.1709 0.3711 -0.31522 2011 10 26 55860 0.1710 0.3698 -0.31672 2011 10 27 55861 0.1711 0.3685 -0.31805 2011 10 28 55862 0.1712 0.3673 -0.31915 2011 10 29 55863 0.1712 0.3660 -0.32005 2011 10 30 55864 0.1713 0.3647 -0.32081 2011 10 31 55865 0.1713 0.3635 -0.32155 2011 11 1 55866 0.1713 0.3622 -0.32233 2011 11 2 55867 0.1713 0.3610 -0.32320 2011 11 3 55868 0.1712 0.3597 -0.32417 2011 11 4 55869 0.1712 0.3584 -0.32521 2011 11 5 55870 0.1711 0.3572 -0.32630 2011 11 6 55871 0.1710 0.3559 -0.32738 2011 11 7 55872 0.1709 0.3547 -0.32844 2011 11 8 55873 0.1707 0.3535 -0.32942 2011 11 9 55874 0.1706 0.3522 -0.33029 2011 11 10 55875 0.1704 0.3510 -0.33105 2011 11 11 55876 0.1702 0.3498 -0.33170 2011 11 12 55877 0.1700 0.3485 -0.33226 2011 11 13 55878 0.1697 0.3473 -0.33276 2011 11 14 55879 0.1694 0.3461 -0.33325 2011 11 15 55880 0.1692 0.3449 -0.33380 2011 11 16 55881 0.1689 0.3437 -0.33444 2011 11 17 55882 0.1686 0.3425 -0.33523 2011 11 18 55883 0.1682 0.3413 -0.33620 2011 11 19 55884 0.1679 0.3402 -0.33734 2011 11 20 55885 0.1675 0.3390 -0.33862 2011 11 21 55886 0.1671 0.3378 -0.33996 2011 11 22 55887 0.1667 0.3367 -0.34126 2011 11 23 55888 0.1663 0.3355 -0.34242 2011 11 24 55889 0.1659 0.3344 -0.34337 2011 11 25 55890 0.1654 0.3332 -0.34410 2011 11 26 55891 0.1649 0.3321 -0.34466 2011 11 27 55892 0.1644 0.3310 -0.34516 2011 11 28 55893 0.1639 0.3299 -0.34568 2011 11 29 55894 0.1634 0.3288 -0.34629 2011 11 30 55895 0.1629 0.3277 -0.34701 2011 12 1 55896 0.1623 0.3266 -0.34784 2011 12 2 55897 0.1618 0.3255 -0.34875 2011 12 3 55898 0.1612 0.3245 -0.34969 2011 12 4 55899 0.1606 0.3234 -0.35062 2011 12 5 55900 0.1600 0.3224 -0.35149 2011 12 6 55901 0.1594 0.3214 -0.35229 2011 12 7 55902 0.1588 0.3204 -0.35298 2011 12 8 55903 0.1581 0.3193 -0.35355 2011 12 9 55904 0.1575 0.3184 -0.35404 2011 12 10 55905 0.1568 0.3174 -0.35446 2011 12 11 55906 0.1561 0.3164 -0.35487 2011 12 12 55907 0.1554 0.3154 -0.35533 2011 12 13 55908 0.1547 0.3145 -0.35589 2011 12 14 55909 0.1540 0.3135 -0.35660 2011 12 15 55910 0.1533 0.3126 -0.35750 2011 12 16 55911 0.1525 0.3117 -0.35860 2011 12 17 55912 0.1518 0.3108 -0.35986 2011 12 18 55913 0.1510 0.3099 -0.36121 2011 12 19 55914 0.1502 0.3090 -0.36253 2011 12 20 55915 0.1495 0.3082 -0.36372 2011 12 21 55916 0.1487 0.3073 -0.36470 2011 12 22 55917 0.1479 0.3065 -0.36546 2011 12 23 55918 0.1471 0.3057 -0.36603 2011 12 24 55919 0.1463 0.3049 -0.36649 2011 12 25 55920 0.1454 0.3041 -0.36695 2011 12 26 55921 0.1446 0.3033 -0.36751 2011 12 27 55922 0.1438 0.3025 -0.36819 2011 12 28 55923 0.1429 0.3018 -0.36900 2011 12 29 55924 0.1421 0.3010 -0.36990 2011 12 30 55925 0.1412 0.3003 -0.37085 2011 12 31 55926 0.1403 0.2996 -0.37182 2012 1 1 55927 0.1395 0.2989 -0.37275 2012 1 2 55928 0.1386 0.2982 -0.37361 2012 1 3 55929 0.1377 0.2975 -0.37432 2012 1 4 55930 0.1368 0.2968 -0.37492 2012 1 5 55931 0.1359 0.2962 -0.37542 2012 1 6 55932 0.1350 0.2956 -0.37588 2012 1 7 55933 0.1341 0.2950 -0.37639 2012 1 8 55934 0.1332 0.2943 -0.37693 2012 1 9 55935 0.1323 0.2938 -0.37760 2012 1 10 55936 0.1314 0.2932 -0.37841 2012 1 11 55937 0.1305 0.2926 -0.37939 2012 1 12 55938 0.1296 0.2921 -0.38054 2012 1 13 55939 0.1287 0.2915 -0.38181 2012 1 14 55940 0.1278 0.2910 -0.38315 2012 1 15 55941 0.1268 0.2905 -0.38447 2012 1 16 55942 0.1259 0.2900 -0.38564 2012 1 17 55943 0.1250 0.2896 -0.38659 2012 1 18 55944 0.1241 0.2891 -0.38730 2012 1 19 55945 0.1231 0.2886 -0.38774 2012 1 20 55946 0.1222 0.2882 -0.38803 2012 1 21 55947 0.1213 0.2878 -0.38833 2012 1 22 55948 0.1204 0.2874 -0.38864 2012 1 23 55949 0.1194 0.2870 -0.38906 2012 1 24 55950 0.1185 0.2866 -0.38961 2012 1 25 55951 0.1176 0.2863 -0.39031 2012 1 26 55952 0.1167 0.2859 -0.39106 2012 1 27 55953 0.1157 0.2856 -0.39175 2012 1 28 55954 0.1148 0.2853 -0.39239 2012 1 29 55955 0.1139 0.2850 -0.39290 2012 1 30 55956 0.1130 0.2847 -0.39329 2012 1 31 55957 0.1121 0.2844 -0.39360 2012 2 1 55958 0.1112 0.2841 -0.39385 2012 2 2 55959 0.1103 0.2839 -0.39403 2012 2 3 55960 0.1094 0.2836 -0.39417 2012 2 4 55961 0.1085 0.2834 -0.39433 2012 2 5 55962 0.1076 0.2832 -0.39461 2012 2 6 55963 0.1067 0.2830 -0.39503 2012 2 7 55964 0.1058 0.2828 -0.39567 2012 2 8 55965 0.1049 0.2826 -0.39657 2012 2 9 55966 0.1040 0.2825 -0.39770 2012 2 10 55967 0.1032 0.2823 -0.39896 2012 2 11 55968 0.1023 0.2822 -0.40031 2012 2 12 55969 0.1014 0.2821 -0.40159 2012 2 13 55970 0.1006 0.2820 -0.40269 2012 2 14 55971 0.0997 0.2819 -0.40360 2012 2 15 55972 0.0989 0.2818 -0.40435 2012 2 16 55973 0.0980 0.2817 -0.40500 2012 2 17 55974 0.0972 0.2816 -0.40567 2012 2 18 55975 0.0964 0.2816 -0.40643 2012 2 19 55976 0.0956 0.2815 -0.40730 2012 2 20 55977 0.0947 0.2815 -0.40833 2012 2 21 55978 0.0939 0.2815 -0.40949 2012 2 22 55979 0.0931 0.2815 -0.41072 2012 2 23 55980 0.0924 0.2815 -0.41199 2012 2 24 55981 0.0916 0.2815 -0.41324 2012 2 25 55982 0.0908 0.2816 -0.41447 2012 2 26 55983 0.0900 0.2816 -0.41558 2012 2 27 55984 0.0893 0.2817 -0.41655 2012 2 28 55985 0.0885 0.2817 -0.41745 2012 2 29 55986 0.0878 0.2818 -0.41823 2012 3 1 55987 0.0870 0.2819 -0.41892 2012 3 2 55988 0.0863 0.2820 -0.41960 2012 3 3 55989 0.0856 0.2821 -0.42036 2012 3 4 55990 0.0849 0.2822 -0.42125 2012 3 5 55991 0.0842 0.2823 -0.42234 2012 3 6 55992 0.0835 0.2824 -0.42371 2012 3 7 55993 0.0828 0.2826 -0.42531 2012 3 8 55994 0.0822 0.2827 -0.42708 2012 3 9 55995 0.0815 0.2829 -0.42893 2012 3 10 55996 0.0809 0.2830 -0.43073 2012 3 11 55997 0.0802 0.2832 -0.43244 2012 3 12 55998 0.0796 0.2834 -0.43398 2012 3 13 55999 0.0790 0.2836 -0.43529 2012 3 14 56000 0.0784 0.2838 -0.43644 2012 3 15 56001 0.0778 0.2840 -0.43751 2012 3 16 56002 0.0772 0.2842 -0.43858 2012 3 17 56003 0.0766 0.2844 -0.43971 2012 3 18 56004 0.0760 0.2846 -0.44090 2012 3 19 56005 0.0755 0.2849 -0.44215 2012 3 20 56006 0.0749 0.2851 -0.44343 2012 3 21 56007 0.0744 0.2854 -0.44474 2012 3 22 56008 0.0738 0.2856 -0.44606 2012 3 23 56009 0.0733 0.2859 -0.44737 2012 3 24 56010 0.0728 0.2861 -0.44861 2012 3 25 56011 0.0723 0.2864 -0.44975 2012 3 26 56012 0.0718 0.2867 -0.45078 2012 3 27 56013 0.0714 0.2870 -0.45166 2012 3 28 56014 0.0709 0.2873 -0.45242 2012 3 29 56015 0.0704 0.2876 -0.45313 2012 3 30 56016 0.0700 0.2879 -0.45392 2012 3 31 56017 0.0696 0.2882 -0.45476 2012 4 1 56018 0.0692 0.2885 -0.45582 2012 4 2 56019 0.0687 0.2888 -0.45715 2012 4 3 56020 0.0683 0.2891 -0.45870 2012 4 4 56021 0.0679 0.2894 -0.46045 2012 4 5 56022 0.0676 0.2898 -0.46225 2012 4 6 56023 0.0672 0.2901 -0.46404 2012 4 7 56024 0.0668 0.2904 -0.46568 2012 4 8 56025 0.0665 0.2908 -0.46714 2012 4 9 56026 0.0662 0.2911 -0.46841 2012 4 10 56027 0.0658 0.2915 -0.46950 2012 4 11 56028 0.0655 0.2918 -0.47051 2012 4 12 56029 0.0652 0.2921 -0.47151 2012 4 13 56030 0.0649 0.2925 -0.47253 2012 4 14 56031 0.0646 0.2929 -0.47360 2012 4 15 56032 0.0644 0.2932 -0.47475 2012 4 16 56033 0.0641 0.2936 -0.47600 2012 4 17 56034 0.0638 0.2939 -0.47731 2012 4 18 56035 0.0636 0.2943 -0.47863 2012 4 19 56036 0.0634 0.2947 -0.47994 2012 4 20 56037 0.0631 0.2950 -0.48114 2012 4 21 56038 0.0629 0.2954 -0.48220 2012 4 22 56039 0.0627 0.2958 -0.48316 2012 4 23 56040 0.0625 0.2961 -0.48399 2012 4 24 56041 0.0623 0.2965 -0.48469 2012 4 25 56042 0.0622 0.2969 -0.48530 2012 4 26 56043 0.0620 0.2972 -0.48588 2012 4 27 56044 0.0618 0.2976 -0.48649 2012 4 28 56045 0.0617 0.2980 -0.48718 2012 4 29 56046 0.0615 0.2984 -0.48800 2012 4 30 56047 0.0614 0.2987 -0.48899 2012 5 1 56048 0.0613 0.2991 -0.49017 2012 5 2 56049 0.0612 0.2995 -0.49148 2012 5 3 56050 0.0611 0.2998 -0.49294 2012 5 4 56051 0.0610 0.3002 -0.49447 2012 5 5 56052 0.0609 0.3006 -0.49588 2012 5 6 56053 0.0608 0.3009 -0.49711 2012 5 7 56054 0.0607 0.3013 -0.49818 2012 5 8 56055 0.0607 0.3017 -0.49917 2012 5 9 56056 0.0606 0.3020 -0.50015 2012 5 10 56057 0.0606 0.3024 -0.50117 2012 5 11 56058 0.0605 0.3028 -0.50226 2012 5 12 56059 0.0605 0.3031 -0.50344 2012 5 13 56060 0.0604 0.3035 -0.50464 2012 5 14 56061 0.0604 0.3038 -0.50585 2012 5 15 56062 0.0604 0.3042 -0.50700 2012 5 16 56063 0.0604 0.3045 -0.50812 2012 5 17 56064 0.0604 0.3049 -0.50917 2012 5 18 56065 0.0604 0.3052 -0.51013 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) 55681 -65.19 0.25 -11.28 0.14 55682 -65.43 0.31 -11.27 0.10 55683 -65.71 0.31 -11.49 0.10 55684 -65.87 0.25 -11.78 0.34 55685 -65.86 0.26 -11.95 0.34 55686 -65.69 0.26 -11.97 0.34 55687 -65.51 0.26 -11.93 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55681 -0.228 0.099 -0.198 0.140 55682 -0.255 0.123 -0.180 0.100 55683 -0.265 0.123 -0.195 0.100 55684 -0.259 0.099 -0.201 0.340 55685 -0.246 0.103 -0.188 0.340 55686 -0.224 0.103 -0.183 0.340 55687 -0.212 0.103 -0.184 0.340 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).