********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 10 February 2011 Vol. XXIV No. 006 ______________________________________________________________________ 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 = -0.2 seconds beginning 6 January 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 * * 30 June 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 2 4 55596 0.04162 .00010 0.20261 .00010 -0.158444 0.000012 11 2 5 55597 0.04029 .00010 0.20293 .00009 -0.159247 0.000012 11 2 6 55598 0.03912 .00010 0.20342 .00009 -0.160006 0.000014 11 2 7 55599 0.03825 .00010 0.20436 .00009 -0.160765 0.000013 11 2 8 55600 0.03747 .00009 0.20573 .00009 -0.161449 0.000010 11 2 9 55601 0.03621 .00009 0.20723 .00009 -0.162068 0.000010 11 2 10 55602 0.03428 .00009 0.20863 .00009 -0.162626 0.000012 _______________________________________________________________________ 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 = 0.0860 - 0.0604 cos A - 0.1012 sin A + 0.0037 cos C - 0.0385 sin C y = 0.3395 - 0.0896 cos A + 0.0551 sin A - 0.0385 cos C - 0.0037 sin C UT1-UTC = -0.1584 - 0.00068 (MJD - 55610) - (UT2-UT1) where A = 2*pi*(MJD-55602)/365.25 and C = 2*pi*(MJD-55602)/435. TAI-UTC(MJD 55603) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55602)**0.80 S t = 0.00025 (MJD-55602)**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 2 11 55603 0.0325 0.2098 -0.16305 2011 2 12 55604 0.0305 0.2107 -0.16338 2011 2 13 55605 0.0286 0.2116 -0.16366 2011 2 14 55606 0.0268 0.2125 -0.16394 2011 2 15 55607 0.0252 0.2135 -0.16431 2011 2 16 55608 0.0236 0.2146 -0.16486 2011 2 17 55609 0.0220 0.2157 -0.16567 2011 2 18 55610 0.0204 0.2169 -0.16674 2011 2 19 55611 0.0188 0.2181 -0.16803 2011 2 20 55612 0.0172 0.2193 -0.16943 2011 2 21 55613 0.0156 0.2205 -0.17078 2011 2 22 55614 0.0140 0.2217 -0.17198 2011 2 23 55615 0.0125 0.2229 -0.17294 2011 2 24 55616 0.0110 0.2241 -0.17365 2011 2 25 55617 0.0095 0.2254 -0.17419 2011 2 26 55618 0.0081 0.2267 -0.17466 2011 2 27 55619 0.0067 0.2280 -0.17513 2011 2 28 55620 0.0053 0.2293 -0.17568 2011 3 1 55621 0.0039 0.2307 -0.17634 2011 3 2 55622 0.0026 0.2321 -0.17713 2011 3 3 55623 0.0013 0.2334 -0.17804 2011 3 4 55624 0.0000 0.2348 -0.17904 2011 3 5 55625 -0.0013 0.2363 -0.18008 2011 3 6 55626 -0.0025 0.2377 -0.18114 2011 3 7 55627 -0.0037 0.2392 -0.18218 2011 3 8 55628 -0.0049 0.2407 -0.18316 2011 3 9 55629 -0.0061 0.2422 -0.18404 2011 3 10 55630 -0.0072 0.2437 -0.18480 2011 3 11 55631 -0.0083 0.2452 -0.18546 2011 3 12 55632 -0.0093 0.2467 -0.18604 2011 3 13 55633 -0.0104 0.2483 -0.18661 2011 3 14 55634 -0.0114 0.2499 -0.18724 2011 3 15 55635 -0.0124 0.2515 -0.18802 2011 3 16 55636 -0.0133 0.2531 -0.18903 2011 3 17 55637 -0.0142 0.2547 -0.19031 2011 3 18 55638 -0.0151 0.2563 -0.19184 2011 3 19 55639 -0.0160 0.2580 -0.19355 2011 3 20 55640 -0.0168 0.2596 -0.19528 2011 3 21 55641 -0.0176 0.2613 -0.19689 2011 3 22 55642 -0.0184 0.2630 -0.19827 2011 3 23 55643 -0.0191 0.2647 -0.19938 2011 3 24 55644 -0.0198 0.2664 -0.20025 2011 3 25 55645 -0.0205 0.2681 -0.20098 2011 3 26 55646 -0.0212 0.2698 -0.20165 2011 3 27 55647 -0.0218 0.2716 -0.20236 2011 3 28 55648 -0.0224 0.2733 -0.20315 2011 3 29 55649 -0.0229 0.2751 -0.20404 2011 3 30 55650 -0.0235 0.2768 -0.20505 2011 3 31 55651 -0.0240 0.2786 -0.20615 2011 4 1 55652 -0.0244 0.2804 -0.20731 2011 4 2 55653 -0.0249 0.2822 -0.20849 2011 4 3 55654 -0.0253 0.2840 -0.20965 2011 4 4 55655 -0.0256 0.2858 -0.21073 2011 4 5 55656 -0.0260 0.2875 -0.21172 2011 4 6 55657 -0.0263 0.2894 -0.21259 2011 4 7 55658 -0.0266 0.2912 -0.21336 2011 4 8 55659 -0.0268 0.2930 -0.21405 2011 4 9 55660 -0.0270 0.2948 -0.21469 2011 4 10 55661 -0.0272 0.2966 -0.21536 2011 4 11 55662 -0.0274 0.2984 -0.21612 2011 4 12 55663 -0.0275 0.3002 -0.21706 2011 4 13 55664 -0.0276 0.3021 -0.21824 2011 4 14 55665 -0.0277 0.3039 -0.21967 2011 4 15 55666 -0.0277 0.3057 -0.22129 2011 4 16 55667 -0.0277 0.3075 -0.22301 2011 4 17 55668 -0.0277 0.3094 -0.22469 2011 4 18 55669 -0.0276 0.3112 -0.22621 2011 4 19 55670 -0.0276 0.3130 -0.22747 2011 4 20 55671 -0.0274 0.3148 -0.22849 2011 4 21 55672 -0.0273 0.3166 -0.22931 2011 4 22 55673 -0.0271 0.3185 -0.23003 2011 4 23 55674 -0.0269 0.3203 -0.23074 2011 4 24 55675 -0.0267 0.3221 -0.23151 2011 4 25 55676 -0.0264 0.3239 -0.23237 2011 4 26 55677 -0.0261 0.3257 -0.23332 2011 4 27 55678 -0.0258 0.3275 -0.23435 2011 4 28 55679 -0.0255 0.3293 -0.23543 2011 4 29 55680 -0.0251 0.3310 -0.23651 2011 4 30 55681 -0.0247 0.3328 -0.23756 2011 5 1 55682 -0.0242 0.3346 -0.23852 2011 5 2 55683 -0.0238 0.3363 -0.23936 2011 5 3 55684 -0.0233 0.3381 -0.24007 2011 5 4 55685 -0.0228 0.3398 -0.24065 2011 5 5 55686 -0.0222 0.3416 -0.24111 2011 5 6 55687 -0.0217 0.3433 -0.24150 2011 5 7 55688 -0.0211 0.3450 -0.24188 2011 5 8 55689 -0.0204 0.3467 -0.24231 2011 5 9 55690 -0.0198 0.3484 -0.24286 2011 5 10 55691 -0.0191 0.3501 -0.24360 2011 5 11 55692 -0.0184 0.3518 -0.24453 2011 5 12 55693 -0.0177 0.3535 -0.24564 2011 5 13 55694 -0.0169 0.3551 -0.24686 2011 5 14 55695 -0.0162 0.3568 -0.24810 2011 5 15 55696 -0.0154 0.3584 -0.24922 2011 5 16 55697 -0.0145 0.3600 -0.25014 2011 5 17 55698 -0.0137 0.3616 -0.25082 2011 5 18 55699 -0.0128 0.3632 -0.25127 2011 5 19 55700 -0.0119 0.3648 -0.25158 2011 5 20 55701 -0.0110 0.3663 -0.25184 2011 5 21 55702 -0.0101 0.3679 -0.25213 2011 5 22 55703 -0.0091 0.3694 -0.25249 2011 5 23 55704 -0.0081 0.3709 -0.25294 2011 5 24 55705 -0.0071 0.3724 -0.25347 2011 5 25 55706 -0.0060 0.3739 -0.25404 2011 5 26 55707 -0.0050 0.3754 -0.25462 2011 5 27 55708 -0.0039 0.3768 -0.25517 2011 5 28 55709 -0.0028 0.3783 -0.25564 2011 5 29 55710 -0.0017 0.3797 -0.25601 2011 5 30 55711 -0.0006 0.3811 -0.25621 2011 5 31 55712 0.0006 0.3825 -0.25627 2011 6 1 55713 0.0018 0.3838 -0.25622 2011 6 2 55714 0.0029 0.3852 -0.25609 2011 6 3 55715 0.0042 0.3865 -0.25594 2011 6 4 55716 0.0054 0.3878 -0.25582 2011 6 5 55717 0.0066 0.3891 -0.25582 2011 6 6 55718 0.0079 0.3904 -0.25598 2011 6 7 55719 0.0092 0.3916 -0.25633 2011 6 8 55720 0.0105 0.3928 -0.25684 2011 6 9 55721 0.0118 0.3940 -0.25745 2011 6 10 55722 0.0131 0.3952 -0.25808 2011 6 11 55723 0.0144 0.3964 -0.25863 2011 6 12 55724 0.0158 0.3975 -0.25901 2011 6 13 55725 0.0172 0.3987 -0.25918 2011 6 14 55726 0.0185 0.3998 -0.25913 2011 6 15 55727 0.0199 0.4009 -0.25892 2011 6 16 55728 0.0214 0.4019 -0.25862 2011 6 17 55729 0.0228 0.4030 -0.25834 2011 6 18 55730 0.0242 0.4040 -0.25812 2011 6 19 55731 0.0257 0.4050 -0.25801 2011 6 20 55732 0.0271 0.4059 -0.25798 2011 6 21 55733 0.0286 0.4069 -0.25802 2011 6 22 55734 0.0300 0.4078 -0.25807 2011 6 23 55735 0.0315 0.4087 -0.25811 2011 6 24 55736 0.0330 0.4096 -0.25808 2011 6 25 55737 0.0345 0.4105 -0.25796 2011 6 26 55738 0.0361 0.4113 -0.25772 2011 6 27 55739 0.0376 0.4121 -0.25734 2011 6 28 55740 0.0391 0.4129 -0.25685 2011 6 29 55741 0.0406 0.4137 -0.25628 2011 6 30 55742 0.0422 0.4144 -0.25567 2011 7 1 55743 0.0437 0.4151 -0.25510 2011 7 2 55744 0.0453 0.4158 -0.25463 2011 7 3 55745 0.0469 0.4165 -0.25434 2011 7 4 55746 0.0484 0.4171 -0.25425 2011 7 5 55747 0.0500 0.4177 -0.25434 2011 7 6 55748 0.0516 0.4183 -0.25456 2011 7 7 55749 0.0531 0.4189 -0.25481 2011 7 8 55750 0.0547 0.4195 -0.25498 2011 7 9 55751 0.0563 0.4200 -0.25501 2011 7 10 55752 0.0579 0.4205 -0.25483 2011 7 11 55753 0.0595 0.4210 -0.25445 2011 7 12 55754 0.0611 0.4214 -0.25391 2011 7 13 55755 0.0627 0.4218 -0.25329 2011 7 14 55756 0.0643 0.4222 -0.25267 2011 7 15 55757 0.0659 0.4226 -0.25211 2011 7 16 55758 0.0675 0.4230 -0.25167 2011 7 17 55759 0.0691 0.4233 -0.25135 2011 7 18 55760 0.0706 0.4236 -0.25112 2011 7 19 55761 0.0722 0.4239 -0.25095 2011 7 20 55762 0.0738 0.4241 -0.25079 2011 7 21 55763 0.0754 0.4244 -0.25060 2011 7 22 55764 0.0770 0.4246 -0.25033 2011 7 23 55765 0.0786 0.4248 -0.24996 2011 7 24 55766 0.0802 0.4249 -0.24948 2011 7 25 55767 0.0817 0.4251 -0.24890 2011 7 26 55768 0.0833 0.4252 -0.24823 2011 7 27 55769 0.0849 0.4253 -0.24753 2011 7 28 55770 0.0864 0.4253 -0.24685 2011 7 29 55771 0.0880 0.4254 -0.24629 2011 7 30 55772 0.0895 0.4254 -0.24590 2011 7 31 55773 0.0911 0.4254 -0.24573 2011 8 1 55774 0.0926 0.4253 -0.24581 2011 8 2 55775 0.0942 0.4253 -0.24607 2011 8 3 55776 0.0957 0.4252 -0.24641 2011 8 4 55777 0.0972 0.4251 -0.24672 2011 8 5 55778 0.0987 0.4250 -0.24689 2011 8 6 55779 0.1002 0.4249 -0.24687 2011 8 7 55780 0.1017 0.4247 -0.24663 2011 8 8 55781 0.1032 0.4245 -0.24623 2011 8 9 55782 0.1047 0.4243 -0.24573 2011 8 10 55783 0.1061 0.4241 -0.24522 2011 8 11 55784 0.1076 0.4238 -0.24477 2011 8 12 55785 0.1090 0.4235 -0.24442 2011 8 13 55786 0.1105 0.4232 -0.24420 2011 8 14 55787 0.1119 0.4229 -0.24408 2011 8 15 55788 0.1133 0.4226 -0.24404 2011 8 16 55789 0.1147 0.4222 -0.24402 2011 8 17 55790 0.1161 0.4218 -0.24399 2011 8 18 55791 0.1175 0.4214 -0.24388 2011 8 19 55792 0.1188 0.4210 -0.24368 2011 8 20 55793 0.1202 0.4205 -0.24338 2011 8 21 55794 0.1215 0.4201 -0.24298 2011 8 22 55795 0.1228 0.4196 -0.24250 2011 8 23 55796 0.1241 0.4191 -0.24200 2011 8 24 55797 0.1254 0.4186 -0.24153 2011 8 25 55798 0.1267 0.4180 -0.24118 2011 8 26 55799 0.1280 0.4175 -0.24102 2011 8 27 55800 0.1292 0.4169 -0.24112 2011 8 28 55801 0.1305 0.4163 -0.24151 2011 8 29 55802 0.1317 0.4157 -0.24216 2011 8 30 55803 0.1329 0.4150 -0.24298 2011 8 31 55804 0.1341 0.4144 -0.24384 2011 9 1 55805 0.1352 0.4137 -0.24462 2011 9 2 55806 0.1364 0.4130 -0.24520 2011 9 3 55807 0.1375 0.4123 -0.24555 2011 9 4 55808 0.1387 0.4116 -0.24569 2011 9 5 55809 0.1398 0.4109 -0.24569 2011 9 6 55810 0.1409 0.4101 -0.24564 2011 9 7 55811 0.1419 0.4093 -0.24561 2011 9 8 55812 0.1430 0.4086 -0.24565 2011 9 9 55813 0.1440 0.4078 -0.24581 2011 9 10 55814 0.1451 0.4070 -0.24608 2011 9 11 55815 0.1461 0.4061 -0.24646 2011 9 12 55816 0.1470 0.4053 -0.24690 2011 9 13 55817 0.1480 0.4044 -0.24735 2011 9 14 55818 0.1489 0.4036 -0.24775 2011 9 15 55819 0.1499 0.4027 -0.24806 2011 9 16 55820 0.1508 0.4018 -0.24829 2011 9 17 55821 0.1517 0.4009 -0.24845 2011 9 18 55822 0.1525 0.4000 -0.24857 2011 9 19 55823 0.1534 0.3990 -0.24871 2011 9 20 55824 0.1542 0.3981 -0.24888 2011 9 21 55825 0.1550 0.3971 -0.24910 2011 9 22 55826 0.1558 0.3962 -0.24937 2011 9 23 55827 0.1566 0.3952 -0.24977 2011 9 24 55828 0.1574 0.3942 -0.25033 2011 9 25 55829 0.1581 0.3932 -0.25113 2011 9 26 55830 0.1588 0.3922 -0.25217 2011 9 27 55831 0.1595 0.3912 -0.25333 2011 9 28 55832 0.1602 0.3901 -0.25452 2011 9 29 55833 0.1608 0.3891 -0.25558 2011 9 30 55834 0.1615 0.3881 -0.25640 2011 10 1 55835 0.1621 0.3870 -0.25698 2011 10 2 55836 0.1627 0.3859 -0.25738 2011 10 3 55837 0.1633 0.3849 -0.25773 2011 10 4 55838 0.1638 0.3838 -0.25813 2011 10 5 55839 0.1643 0.3827 -0.25863 2011 10 6 55840 0.1649 0.3816 -0.25927 2011 10 7 55841 0.1653 0.3805 -0.26001 2011 10 8 55842 0.1658 0.3794 -0.26081 2011 10 9 55843 0.1663 0.3783 -0.26171 2011 10 10 55844 0.1667 0.3772 -0.26260 2011 10 11 55845 0.1671 0.3761 -0.26343 2011 10 12 55846 0.1675 0.3749 -0.26416 2011 10 13 55847 0.1679 0.3738 -0.26479 2011 10 14 55848 0.1682 0.3727 -0.26530 2011 10 15 55849 0.1686 0.3715 -0.26571 2011 10 16 55850 0.1689 0.3704 -0.26603 2011 10 17 55851 0.1692 0.3693 -0.26632 2011 10 18 55852 0.1694 0.3681 -0.26665 2011 10 19 55853 0.1697 0.3670 -0.26704 2011 10 20 55854 0.1699 0.3658 -0.26763 2011 10 21 55855 0.1701 0.3647 -0.26851 2011 10 22 55856 0.1703 0.3635 -0.26961 2011 10 23 55857 0.1705 0.3624 -0.27093 2011 10 24 55858 0.1706 0.3612 -0.27245 2011 10 25 55859 0.1708 0.3600 -0.27409 2011 10 26 55860 0.1709 0.3589 -0.27573 2011 10 27 55861 0.1710 0.3577 -0.27722 2011 10 28 55862 0.1710 0.3566 -0.27849 2011 10 29 55863 0.1711 0.3554 -0.27957 2011 10 30 55864 0.1711 0.3543 -0.28049 2011 10 31 55865 0.1712 0.3531 -0.28136 2011 11 1 55866 0.1712 0.3520 -0.28223 2011 11 2 55867 0.1711 0.3508 -0.28324 2011 11 3 55868 0.1711 0.3496 -0.28437 2011 11 4 55869 0.1710 0.3485 -0.28562 2011 11 5 55870 0.1710 0.3474 -0.28697 2011 11 6 55871 0.1709 0.3462 -0.28835 2011 11 7 55872 0.1708 0.3451 -0.28970 2011 11 8 55873 0.1706 0.3439 -0.29098 2011 11 9 55874 0.1705 0.3428 -0.29215 2011 11 10 55875 0.1703 0.3417 -0.29326 2011 11 11 55876 0.1701 0.3406 -0.29437 2011 11 12 55877 0.1699 0.3394 -0.29543 2011 11 13 55878 0.1697 0.3383 -0.29636 2011 11 14 55879 0.1695 0.3372 -0.29725 2011 11 15 55880 0.1693 0.3361 -0.29822 2011 11 16 55881 0.1690 0.3350 -0.29934 2011 11 17 55882 0.1687 0.3339 -0.30066 2011 11 18 55883 0.1684 0.3328 -0.30212 2011 11 19 55884 0.1681 0.3318 -0.30373 2011 11 20 55885 0.1678 0.3307 -0.30547 2011 11 21 55886 0.1674 0.3296 -0.30725 2011 11 22 55887 0.1671 0.3286 -0.30894 2011 11 23 55888 0.1667 0.3275 -0.31049 2011 11 24 55889 0.1663 0.3265 -0.31180 2011 11 25 55890 0.1659 0.3254 -0.31288 2011 11 26 55891 0.1655 0.3244 -0.31384 2011 11 27 55892 0.1651 0.3234 -0.31474 2011 11 28 55893 0.1646 0.3224 -0.31565 2011 11 29 55894 0.1642 0.3214 -0.31656 2011 11 30 55895 0.1637 0.3204 -0.31746 2011 12 1 55896 0.1632 0.3194 -0.31833 2011 12 2 55897 0.1628 0.3184 -0.31912 2011 12 3 55898 0.1623 0.3174 -0.31987 2011 12 4 55899 0.1617 0.3165 -0.32058 2011 12 5 55900 0.1612 0.3155 -0.32126 2011 12 6 55901 0.1607 0.3146 -0.32190 2011 12 7 55902 0.1601 0.3137 -0.32251 2011 12 8 55903 0.1596 0.3127 -0.32308 2011 12 9 55904 0.1590 0.3118 -0.32362 2011 12 10 55905 0.1584 0.3109 -0.32416 2011 12 11 55906 0.1578 0.3101 -0.32473 2011 12 12 55907 0.1572 0.3092 -0.32535 2011 12 13 55908 0.1566 0.3083 -0.32601 2011 12 14 55909 0.1560 0.3075 -0.32675 2011 12 15 55910 0.1553 0.3066 -0.32766 2011 12 16 55911 0.1547 0.3058 -0.32875 2011 12 17 55912 0.1540 0.3050 -0.33001 2011 12 18 55913 0.1534 0.3041 -0.33135 2011 12 19 55914 0.1527 0.3034 -0.33267 2011 12 20 55915 0.1520 0.3026 -0.33391 2011 12 21 55916 0.1514 0.3018 -0.33501 2011 12 22 55917 0.1507 0.3010 -0.33594 2011 12 23 55918 0.1500 0.3003 -0.33671 2011 12 24 55919 0.1493 0.2995 -0.33740 2011 12 25 55920 0.1486 0.2988 -0.33805 2011 12 26 55921 0.1478 0.2981 -0.33874 2011 12 27 55922 0.1471 0.2974 -0.33947 2011 12 28 55923 0.1464 0.2967 -0.34029 2011 12 29 55924 0.1457 0.2960 -0.34115 2011 12 30 55925 0.1449 0.2954 -0.34204 2011 12 31 55926 0.1442 0.2947 -0.34293 2012 1 1 55927 0.1434 0.2941 -0.34372 2012 1 2 55928 0.1427 0.2935 -0.34440 2012 1 3 55929 0.1419 0.2929 -0.34494 2012 1 4 55930 0.1412 0.2923 -0.34530 2012 1 5 55931 0.1404 0.2917 -0.34552 2012 1 6 55932 0.1397 0.2911 -0.34565 2012 1 7 55933 0.1389 0.2906 -0.34579 2012 1 8 55934 0.1381 0.2900 -0.34602 2012 1 9 55935 0.1373 0.2895 -0.34641 2012 1 10 55936 0.1366 0.2890 -0.34691 2012 1 11 55937 0.1358 0.2885 -0.34748 2012 1 12 55938 0.1350 0.2880 -0.34814 2012 1 13 55939 0.1342 0.2875 -0.34892 2012 1 14 55940 0.1335 0.2870 -0.34973 2012 1 15 55941 0.1327 0.2866 -0.35044 2012 1 16 55942 0.1319 0.2861 -0.35105 2012 1 17 55943 0.1311 0.2857 -0.35155 2012 1 18 55944 0.1303 0.2853 -0.35191 2012 1 19 55945 0.1296 0.2849 -0.35219 2012 1 20 55946 0.1288 0.2845 -0.35239 2012 1 21 55947 0.1280 0.2841 -0.35262 2012 1 22 55948 0.1272 0.2838 -0.35292 2012 1 23 55949 0.1264 0.2834 -0.35327 2012 1 24 55950 0.1257 0.2831 -0.35372 2012 1 25 55951 0.1249 0.2828 -0.35425 2012 1 26 55952 0.1241 0.2824 -0.35491 2012 1 27 55953 0.1234 0.2821 -0.35573 2012 1 28 55954 0.1226 0.2819 -0.35656 2012 1 29 55955 0.1218 0.2816 -0.35737 2012 1 30 55956 0.1211 0.2813 -0.35816 2012 1 31 55957 0.1203 0.2811 -0.35878 2012 2 1 55958 0.1196 0.2809 -0.35924 2012 2 2 55959 0.1188 0.2806 -0.35969 2012 2 3 55960 0.1181 0.2804 -0.36010 2012 2 4 55961 0.1173 0.2802 -0.36058 2012 2 5 55962 0.1166 0.2800 -0.36114 2012 2 6 55963 0.1158 0.2799 -0.36183 2012 2 7 55964 0.1151 0.2797 -0.36276 2012 2 8 55965 0.1144 0.2796 -0.36392 2012 2 9 55966 0.1137 0.2794 -0.36526 2012 2 10 55967 0.1129 0.2793 -0.36671 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) 55583 -66.60 0.19 -6.69 0.34 55584 -66.82 0.13 -6.44 0.34 55585 -67.16 0.13 -6.35 0.34 55586 -67.40 0.74 -6.39 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55583 0.046 0.076 -0.358 0.340 55584 0.041 0.052 -0.349 0.340 55585 0.040 0.052 -0.299 0.340 55586 0.040 0.294 -0.257 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.