********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 January 2012 Vol. XXV 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 = -0.4 seconds beginning 04 Nov 2011 at 0000 UTC = -0.5 seconds beginning 09 Feb 2012 at 0000 UTC Beginning 1 January 2009: TAI-UTC = 34.000 000 seconds *********************************************************************** * A positive leap second WILL be introduced * * in UTC on 30 June 2012. * *********************************************************************** ________________________________________________________________________ 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 12 1 20 55946 0.08543 .00010 0.25429 .00009 -0.439301 0.000009 12 1 21 55947 0.08322 .00010 0.25461 .00009 -0.439993 0.000008 12 1 22 55948 0.08079 .00010 0.25494 .00009 -0.440803 0.000008 12 1 23 55949 0.07862 .00010 0.25517 .00010 -0.441712 0.000006 12 1 24 55950 0.07654 .00010 0.25557 .00009 -0.442707 0.000006 12 1 25 55951 0.07427 .00010 0.25587 .00009 -0.443812 0.000005 12 1 26 55952 0.07194 .00010 0.25604 .00009 -0.444953 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 = 0.0792 - 0.0665 cos A - 0.1027 sin A + 0.0584 cos C + 0.0166 sin C y = 0.3336 - 0.0965 cos A + 0.0564 sin A + 0.0166 cos C - 0.0584 sin C UT1-UTC = -0.4571 - 0.00087 (MJD - 55960) - (UT2-UT1) where A = 2*pi*(MJD-55952)/365.25 and C = 2*pi*(MJD-55952)/435. TAI-UTC(MJD 55953) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55952)**0.80 S t = 0.00025 (MJD-55952)**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) 2012 1 27 55953 0.0700 0.2562 -0.44604 2012 1 28 55954 0.0681 0.2565 -0.44705 2012 1 29 55955 0.0665 0.2568 -0.44794 2012 1 30 55956 0.0650 0.2573 -0.44868 2012 1 31 55957 0.0636 0.2579 -0.44926 2012 2 1 55958 0.0623 0.2585 -0.44968 2012 2 2 55959 0.0610 0.2592 -0.44999 2012 2 3 55960 0.0598 0.2599 -0.45026 2012 2 4 55961 0.0586 0.2606 -0.45055 2012 2 5 55962 0.0575 0.2613 -0.45094 2012 2 6 55963 0.0564 0.2621 -0.45154 2012 2 7 55964 0.0554 0.2629 -0.45238 2012 2 8 55965 0.0544 0.2637 -0.45348 2012 2 9 55966 0.0535 0.2645 -0.45483 2012 2 10 55967 0.0525 0.2653 -0.45634 2012 2 11 55968 0.0516 0.2662 -0.45791 2012 2 12 55969 0.0508 0.2671 -0.45943 2012 2 13 55970 0.0499 0.2680 -0.46084 2012 2 14 55971 0.0491 0.2689 -0.46209 2012 2 15 55972 0.0483 0.2698 -0.46318 2012 2 16 55973 0.0475 0.2707 -0.46418 2012 2 17 55974 0.0467 0.2716 -0.46516 2012 2 18 55975 0.0460 0.2726 -0.46621 2012 2 19 55976 0.0453 0.2735 -0.46738 2012 2 20 55977 0.0446 0.2745 -0.46870 2012 2 21 55978 0.0439 0.2755 -0.47016 2012 2 22 55979 0.0433 0.2765 -0.47174 2012 2 23 55980 0.0427 0.2775 -0.47336 2012 2 24 55981 0.0421 0.2785 -0.47495 2012 2 25 55982 0.0415 0.2795 -0.47647 2012 2 26 55983 0.0409 0.2805 -0.47788 2012 2 27 55984 0.0404 0.2815 -0.47917 2012 2 28 55985 0.0399 0.2826 -0.48034 2012 2 29 55986 0.0394 0.2836 -0.48141 2012 3 1 55987 0.0389 0.2847 -0.48241 2012 3 2 55988 0.0385 0.2858 -0.48339 2012 3 3 55989 0.0380 0.2868 -0.48440 2012 3 4 55990 0.0376 0.2879 -0.48552 2012 3 5 55991 0.0373 0.2890 -0.48680 2012 3 6 55992 0.0369 0.2901 -0.48828 2012 3 7 55993 0.0366 0.2912 -0.48996 2012 3 8 55994 0.0362 0.2923 -0.49182 2012 3 9 55995 0.0360 0.2934 -0.49376 2012 3 10 55996 0.0357 0.2945 -0.49567 2012 3 11 55997 0.0354 0.2956 -0.49745 2012 3 12 55998 0.0352 0.2967 -0.49904 2012 3 13 55999 0.0350 0.2978 -0.50042 2012 3 14 56000 0.0348 0.2989 -0.50164 2012 3 15 56001 0.0347 0.3000 -0.50278 2012 3 16 56002 0.0346 0.3012 -0.50392 2012 3 17 56003 0.0344 0.3023 -0.50514 2012 3 18 56004 0.0344 0.3034 -0.50645 2012 3 19 56005 0.0343 0.3045 -0.50789 2012 3 20 56006 0.0343 0.3057 -0.50941 2012 3 21 56007 0.0342 0.3068 -0.51098 2012 3 22 56008 0.0342 0.3079 -0.51255 2012 3 23 56009 0.0343 0.3090 -0.51406 2012 3 24 56010 0.0343 0.3102 -0.51547 2012 3 25 56011 0.0344 0.3113 -0.51677 2012 3 26 56012 0.0345 0.3124 -0.51793 2012 3 27 56013 0.0346 0.3135 -0.51899 2012 3 28 56014 0.0347 0.3146 -0.51996 2012 3 29 56015 0.0349 0.3158 -0.52089 2012 3 30 56016 0.0351 0.3169 -0.52183 2012 3 31 56017 0.0353 0.3180 -0.52285 2012 4 1 56018 0.0355 0.3191 -0.52401 2012 4 2 56019 0.0357 0.3202 -0.52536 2012 4 3 56020 0.0360 0.3213 -0.52693 2012 4 4 56021 0.0363 0.3224 -0.52870 2012 4 5 56022 0.0366 0.3235 -0.53062 2012 4 6 56023 0.0369 0.3245 -0.53259 2012 4 7 56024 0.0372 0.3256 -0.53450 2012 4 8 56025 0.0376 0.3267 -0.53625 2012 4 9 56026 0.0380 0.3277 -0.53780 2012 4 10 56027 0.0384 0.3288 -0.53916 2012 4 11 56028 0.0388 0.3298 -0.54040 2012 4 12 56029 0.0393 0.3309 -0.54161 2012 4 13 56030 0.0397 0.3319 -0.54285 2012 4 14 56031 0.0402 0.3329 -0.54418 2012 4 15 56032 0.0407 0.3340 -0.54559 2012 4 16 56033 0.0412 0.3350 -0.54706 2012 4 17 56034 0.0418 0.3360 -0.54856 2012 4 18 56035 0.0423 0.3370 -0.55005 2012 4 19 56036 0.0429 0.3379 -0.55148 2012 4 20 56037 0.0435 0.3389 -0.55283 2012 4 21 56038 0.0441 0.3399 -0.55406 2012 4 22 56039 0.0448 0.3408 -0.55516 2012 4 23 56040 0.0454 0.3418 -0.55614 2012 4 24 56041 0.0461 0.3427 -0.55703 2012 4 25 56042 0.0467 0.3436 -0.55785 2012 4 26 56043 0.0474 0.3445 -0.55867 2012 4 27 56044 0.0482 0.3454 -0.55952 2012 4 28 56045 0.0489 0.3463 -0.56046 2012 4 29 56046 0.0496 0.3472 -0.56153 2012 4 30 56047 0.0504 0.3480 -0.56277 2012 5 1 56048 0.0512 0.3489 -0.56418 2012 5 2 56049 0.0519 0.3497 -0.56575 2012 5 3 56050 0.0527 0.3505 -0.56740 2012 5 4 56051 0.0536 0.3513 -0.56904 2012 5 5 56052 0.0544 0.3521 -0.57057 2012 5 6 56053 0.0552 0.3529 -0.57192 2012 5 7 56054 0.0561 0.3537 -0.57306 2012 5 8 56055 0.0569 0.3544 -0.57405 2012 5 9 56056 0.0578 0.3552 -0.57496 2012 5 10 56057 0.0587 0.3559 -0.57588 2012 5 11 56058 0.0596 0.3566 -0.57687 2012 5 12 56059 0.0605 0.3573 -0.57793 2012 5 13 56060 0.0615 0.3580 -0.57906 2012 5 14 56061 0.0624 0.3586 -0.58022 2012 5 15 56062 0.0634 0.3593 -0.58136 2012 5 16 56063 0.0643 0.3599 -0.58243 2012 5 17 56064 0.0653 0.3605 -0.58341 2012 5 18 56065 0.0663 0.3611 -0.58427 2012 5 19 56066 0.0672 0.3617 -0.58499 2012 5 20 56067 0.0682 0.3623 -0.58557 2012 5 21 56068 0.0692 0.3628 -0.58605 2012 5 22 56069 0.0703 0.3634 -0.58645 2012 5 23 56070 0.0713 0.3639 -0.58682 2012 5 24 56071 0.0723 0.3644 -0.58721 2012 5 25 56072 0.0733 0.3649 -0.58766 2012 5 26 56073 0.0744 0.3653 -0.58823 2012 5 27 56074 0.0754 0.3658 -0.58892 2012 5 28 56075 0.0765 0.3662 -0.58977 2012 5 29 56076 0.0775 0.3666 -0.59075 2012 5 30 56077 0.0786 0.3670 -0.59182 2012 5 31 56078 0.0796 0.3674 -0.59291 2012 6 1 56079 0.0807 0.3678 -0.59393 2012 6 2 56080 0.0818 0.3681 -0.59481 2012 6 3 56081 0.0829 0.3685 -0.59550 2012 6 4 56082 0.0839 0.3688 -0.59603 2012 6 5 56083 0.0850 0.3691 -0.59645 2012 6 6 56084 0.0861 0.3693 -0.59686 2012 6 7 56085 0.0872 0.3696 -0.59732 2012 6 8 56086 0.0883 0.3698 -0.59787 2012 6 9 56087 0.0894 0.3701 -0.59850 2012 6 10 56088 0.0905 0.3703 -0.59917 2012 6 11 56089 0.0916 0.3705 -0.59981 2012 6 12 56090 0.0926 0.3706 -0.60040 2012 6 13 56091 0.0937 0.3708 -0.60088 2012 6 14 56092 0.0948 0.3709 -0.60124 2012 6 15 56093 0.0959 0.3710 -0.60145 2012 6 16 56094 0.0970 0.3712 -0.60153 2012 6 17 56095 0.0981 0.3712 -0.60150 2012 6 18 56096 0.0992 0.3713 -0.60137 2012 6 19 56097 0.1002 0.3713 -0.60121 2012 6 20 56098 0.1013 0.3714 -0.60105 2012 6 21 56099 0.1024 0.3714 -0.60096 2012 6 22 56100 0.1035 0.3714 -0.60097 2012 6 23 56101 0.1045 0.3714 -0.60112 2012 6 24 56102 0.1056 0.3713 -0.60142 2012 6 25 56103 0.1067 0.3713 -0.60184 2012 6 26 56104 0.1077 0.3712 -0.60236 2012 6 27 56105 0.1088 0.3711 -0.60290 2012 6 28 56106 0.1098 0.3710 -0.60341 2012 6 29 56107 0.1108 0.3709 -0.60380 2012 6 30 56108 0.1119 0.3708 -0.60405 2012 7 1 56109 0.1129 0.3706 0.39585 2012 7 2 56110 0.1139 0.3704 0.39586 2012 7 3 56111 0.1149 0.3702 0.39589 2012 7 4 56112 0.1159 0.3700 0.39588 2012 7 5 56113 0.1169 0.3698 0.39576 2012 7 6 56114 0.1179 0.3696 0.39552 2012 7 7 56115 0.1189 0.3693 0.39521 2012 7 8 56116 0.1198 0.3691 0.39486 2012 7 9 56117 0.1208 0.3688 0.39456 2012 7 10 56118 0.1218 0.3685 0.39433 2012 7 11 56119 0.1227 0.3682 0.39422 2012 7 12 56120 0.1236 0.3678 0.39424 2012 7 13 56121 0.1245 0.3675 0.39439 2012 7 14 56122 0.1255 0.3671 0.39466 2012 7 15 56123 0.1263 0.3668 0.39501 2012 7 16 56124 0.1272 0.3664 0.39540 2012 7 17 56125 0.1281 0.3660 0.39578 2012 7 18 56126 0.1290 0.3656 0.39610 2012 7 19 56127 0.1298 0.3651 0.39630 2012 7 20 56128 0.1307 0.3647 0.39636 2012 7 21 56129 0.1315 0.3642 0.39625 2012 7 22 56130 0.1323 0.3638 0.39600 2012 7 23 56131 0.1331 0.3633 0.39565 2012 7 24 56132 0.1339 0.3628 0.39525 2012 7 25 56133 0.1347 0.3623 0.39489 2012 7 26 56134 0.1354 0.3618 0.39464 2012 7 27 56135 0.1362 0.3612 0.39453 2012 7 28 56136 0.1369 0.3607 0.39456 2012 7 29 56137 0.1376 0.3601 0.39472 2012 7 30 56138 0.1383 0.3596 0.39492 2012 7 31 56139 0.1390 0.3590 0.39511 2012 8 1 56140 0.1397 0.3584 0.39520 2012 8 2 56141 0.1403 0.3578 0.39516 2012 8 3 56142 0.1410 0.3572 0.39499 2012 8 4 56143 0.1416 0.3566 0.39475 2012 8 5 56144 0.1422 0.3560 0.39448 2012 8 6 56145 0.1428 0.3553 0.39424 2012 8 7 56146 0.1434 0.3547 0.39408 2012 8 8 56147 0.1439 0.3540 0.39402 2012 8 9 56148 0.1445 0.3534 0.39407 2012 8 10 56149 0.1450 0.3527 0.39420 2012 8 11 56150 0.1455 0.3520 0.39440 2012 8 12 56151 0.1460 0.3513 0.39463 2012 8 13 56152 0.1465 0.3506 0.39484 2012 8 14 56153 0.1469 0.3499 0.39497 2012 8 15 56154 0.1474 0.3492 0.39497 2012 8 16 56155 0.1478 0.3485 0.39480 2012 8 17 56156 0.1482 0.3478 0.39445 2012 8 18 56157 0.1486 0.3471 0.39390 2012 8 19 56158 0.1490 0.3463 0.39321 2012 8 20 56159 0.1493 0.3456 0.39242 2012 8 21 56160 0.1497 0.3448 0.39163 2012 8 22 56161 0.1500 0.3441 0.39094 2012 8 23 56162 0.1503 0.3433 0.39040 2012 8 24 56163 0.1506 0.3426 0.39002 2012 8 25 56164 0.1508 0.3418 0.38978 2012 8 26 56165 0.1511 0.3411 0.38959 2012 8 27 56166 0.1513 0.3403 0.38939 2012 8 28 56167 0.1515 0.3395 0.38910 2012 8 29 56168 0.1517 0.3388 0.38868 2012 8 30 56169 0.1519 0.3380 0.38812 2012 8 31 56170 0.1520 0.3372 0.38745 2012 9 1 56171 0.1522 0.3364 0.38673 2012 9 2 56172 0.1523 0.3356 0.38601 2012 9 3 56173 0.1524 0.3349 0.38533 2012 9 4 56174 0.1525 0.3341 0.38475 2012 9 5 56175 0.1526 0.3333 0.38431 2012 9 6 56176 0.1526 0.3325 0.38404 2012 9 7 56177 0.1526 0.3317 0.38382 2012 9 8 56178 0.1526 0.3309 0.38360 2012 9 9 56179 0.1526 0.3302 0.38332 2012 9 10 56180 0.1526 0.3294 0.38295 2012 9 11 56181 0.1526 0.3286 0.38249 2012 9 12 56182 0.1525 0.3278 0.38192 2012 9 13 56183 0.1524 0.3270 0.38123 2012 9 14 56184 0.1523 0.3263 0.38036 2012 9 15 56185 0.1522 0.3255 0.37928 2012 9 16 56186 0.1521 0.3247 0.37804 2012 9 17 56187 0.1519 0.3240 0.37674 2012 9 18 56188 0.1518 0.3232 0.37545 2012 9 19 56189 0.1516 0.3224 0.37427 2012 9 20 56190 0.1514 0.3217 0.37321 2012 9 21 56191 0.1512 0.3209 0.37226 2012 9 22 56192 0.1509 0.3202 0.37134 2012 9 23 56193 0.1507 0.3194 0.37042 2012 9 24 56194 0.1504 0.3187 0.36937 2012 9 25 56195 0.1501 0.3180 0.36822 2012 9 26 56196 0.1498 0.3172 0.36698 2012 9 27 56197 0.1495 0.3165 0.36560 2012 9 28 56198 0.1492 0.3158 0.36419 2012 9 29 56199 0.1488 0.3151 0.36276 2012 9 30 56200 0.1484 0.3144 0.36130 2012 10 1 56201 0.1481 0.3137 0.35986 2012 10 2 56202 0.1477 0.3130 0.35854 2012 10 3 56203 0.1473 0.3124 0.35730 2012 10 4 56204 0.1468 0.3117 0.35615 2012 10 5 56205 0.1464 0.3110 0.35513 2012 10 6 56206 0.1459 0.3104 0.35411 2012 10 7 56207 0.1455 0.3097 0.35305 2012 10 8 56208 0.1450 0.3091 0.35193 2012 10 9 56209 0.1445 0.3085 0.35074 2012 10 10 56210 0.1440 0.3078 0.34940 2012 10 11 56211 0.1434 0.3072 0.34793 2012 10 12 56212 0.1429 0.3066 0.34631 2012 10 13 56213 0.1424 0.3060 0.34457 2012 10 14 56214 0.1418 0.3055 0.34287 2012 10 15 56215 0.1412 0.3049 0.34119 2012 10 16 56216 0.1406 0.3043 0.33954 2012 10 17 56217 0.1400 0.3038 0.33803 2012 10 18 56218 0.1394 0.3032 0.33660 2012 10 19 56219 0.1388 0.3027 0.33525 2012 10 20 56220 0.1382 0.3022 0.33389 2012 10 21 56221 0.1375 0.3017 0.33238 2012 10 22 56222 0.1369 0.3012 0.33076 2012 10 23 56223 0.1362 0.3007 0.32902 2012 10 24 56224 0.1355 0.3003 0.32720 2012 10 25 56225 0.1348 0.2998 0.32534 2012 10 26 56226 0.1341 0.2994 0.32359 2012 10 27 56227 0.1334 0.2989 0.32195 2012 10 28 56228 0.1327 0.2985 0.32040 2012 10 29 56229 0.1320 0.2981 0.31892 2012 10 30 56230 0.1313 0.2977 0.31763 2012 10 31 56231 0.1305 0.2974 0.31648 2012 11 1 56232 0.1298 0.2970 0.31542 2012 11 2 56233 0.1291 0.2966 0.31443 2012 11 3 56234 0.1283 0.2963 0.31344 2012 11 4 56235 0.1275 0.2960 0.31245 2012 11 5 56236 0.1268 0.2957 0.31149 2012 11 6 56237 0.1260 0.2954 0.31044 2012 11 7 56238 0.1252 0.2951 0.30935 2012 11 8 56239 0.1244 0.2948 0.30816 2012 11 9 56240 0.1236 0.2946 0.30683 2012 11 10 56241 0.1228 0.2943 0.30539 2012 11 11 56242 0.1220 0.2941 0.30395 2012 11 12 56243 0.1212 0.2939 0.30254 2012 11 13 56244 0.1204 0.2937 0.30124 2012 11 14 56245 0.1196 0.2935 0.30010 2012 11 15 56246 0.1188 0.2934 0.29909 2012 11 16 56247 0.1180 0.2932 0.29819 2012 11 17 56248 0.1171 0.2931 0.29729 2012 11 18 56249 0.1163 0.2930 0.29629 2012 11 19 56250 0.1155 0.2929 0.29517 2012 11 20 56251 0.1147 0.2928 0.29399 2012 11 21 56252 0.1139 0.2927 0.29282 2012 11 22 56253 0.1130 0.2926 0.29171 2012 11 23 56254 0.1122 0.2926 0.29072 2012 11 24 56255 0.1114 0.2925 0.28984 2012 11 25 56256 0.1106 0.2925 0.28907 2012 11 26 56257 0.1097 0.2925 0.28834 2012 11 27 56258 0.1089 0.2925 0.28770 2012 11 28 56259 0.1081 0.2926 0.28713 2012 11 29 56260 0.1073 0.2926 0.28661 2012 11 30 56261 0.1064 0.2927 0.28613 2012 12 1 56262 0.1056 0.2928 0.28565 2012 12 2 56263 0.1048 0.2928 0.28507 2012 12 3 56264 0.1040 0.2929 0.28435 2012 12 4 56265 0.1032 0.2931 0.28346 2012 12 5 56266 0.1024 0.2932 0.28239 2012 12 6 56267 0.1016 0.2933 0.28114 2012 12 7 56268 0.1008 0.2935 0.27982 2012 12 8 56269 0.1000 0.2937 0.27844 2012 12 9 56270 0.0992 0.2939 0.27709 2012 12 10 56271 0.0985 0.2941 0.27577 2012 12 11 56272 0.0977 0.2943 0.27461 2012 12 12 56273 0.0969 0.2945 0.27365 2012 12 13 56274 0.0962 0.2948 0.27283 2012 12 14 56275 0.0954 0.2951 0.27204 2012 12 15 56276 0.0947 0.2953 0.27131 2012 12 16 56277 0.0940 0.2956 0.27052 2012 12 17 56278 0.0932 0.2959 0.26966 2012 12 18 56279 0.0925 0.2962 0.26873 2012 12 19 56280 0.0918 0.2966 0.26787 2012 12 20 56281 0.0911 0.2969 0.26712 2012 12 21 56282 0.0904 0.2973 0.26646 2012 12 22 56283 0.0897 0.2976 0.26588 2012 12 23 56284 0.0891 0.2980 0.26539 2012 12 24 56285 0.0884 0.2984 0.26502 2012 12 25 56286 0.0877 0.2988 0.26476 2012 12 26 56287 0.0871 0.2993 0.26457 2012 12 27 56288 0.0865 0.2997 0.26439 2012 12 28 56289 0.0858 0.3001 0.26406 2012 12 29 56290 0.0852 0.3006 0.26369 2012 12 30 56291 0.0846 0.3011 0.26322 2012 12 31 56292 0.0841 0.3015 0.26263 2013 1 1 56293 0.0835 0.3020 0.26195 2013 1 2 56294 0.0829 0.3025 0.26111 2013 1 3 56295 0.0824 0.3031 0.26014 2013 1 4 56296 0.0818 0.3036 0.25916 2013 1 5 56297 0.0813 0.3041 0.25818 2013 1 6 56298 0.0808 0.3047 0.25735 2013 1 7 56299 0.0803 0.3052 0.25662 2013 1 8 56300 0.0799 0.3058 0.25601 2013 1 9 56301 0.0794 0.3064 0.25556 2013 1 10 56302 0.0789 0.3069 0.25508 2013 1 11 56303 0.0785 0.3075 0.25455 2013 1 12 56304 0.0781 0.3081 0.25386 2013 1 13 56305 0.0777 0.3087 0.25299 2013 1 14 56306 0.0773 0.3094 0.25194 2013 1 15 56307 0.0769 0.3100 0.25081 2013 1 16 56308 0.0766 0.3106 0.24968 2013 1 17 56309 0.0762 0.3113 0.24870 2013 1 18 56310 0.0759 0.3119 0.24787 2013 1 19 56311 0.0756 0.3126 0.24715 2013 1 20 56312 0.0753 0.3132 0.24661 2013 1 21 56313 0.0750 0.3139 0.24619 2013 1 22 56314 0.0747 0.3146 0.24590 2013 1 23 56315 0.0745 0.3153 0.24566 2013 1 24 56316 0.0743 0.3160 0.24543 2013 1 25 56317 0.0741 0.3166 0.24515 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) 55933 -70.78 0.10 -7.53 0.05 55934 -70.88 0.12 -7.61 0.03 55935 -70.81 0.12 -7.76 0.03 55936 -70.52 0.11 -7.93 0.03 55937 -70.20 0.11 -8.00 0.04 55938 -70.08 0.11 -7.91 0.04 55939 -70.25 0.11 -7.73 0.04 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55933 0.320 0.040 -0.194 0.050 55934 0.305 0.048 -0.203 0.030 55935 0.286 0.048 -0.217 0.030 55936 0.265 0.044 -0.235 0.030 55937 0.242 0.044 -0.244 0.040 55938 0.223 0.044 -0.243 0.040 55939 0.205 0.044 -0.259 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).