BULLETIN B 249 (IAU 2000) 4 November 2008 ============================================================================== Following IAU Conventions 2000, IERS provides new products dX, dY, celestial pole offsets with respect to the new IAU2000A Precession-Nutation theory . The present Bulletin B version includes the celestial pole offsets dX, dY: dX = X_obs - X_IAU2000A and dY = Y_obs - Y_IAU2000A where X_obs, Y_obs are the observed coordinates of the Celestial Intermediate Pole (CIP) in the Geocentric Celestial Reference System, and X_IAU2000A, Y_IAU2000A are the celestial pole coordinates provided by using the IAU2000A Precession-Nutation theory. The current Bulletin B including (dpsi,deps)_1980 will be maintained as long as necessary. For more details refer to IERS Messages 38, on IAU 2000 Resolution Compliancy Information. ============================================================================== Contents are described in the Explanatory Supplement available at http://hpiers.obspm.fr/eop-pc/ 1 - EARTH ORIENTATION PARAMETERS (IERS evaluation). The values in this section are samplings of section 2 given at five-day intervals. Date MJD x y UT1R-UTC UT1R-TAI dX dY 2008 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. SEP 5 54714 0.29867 0.30358 -0.467119 -33.467119 0.08 -0.47 SEP 10 54719 0.29689 0.28673 -0.470492 -33.470492 0.25 -0.48 SEP 15 54724 0.29147 0.27134 -0.474866 -33.474866 0.20 -0.50 SEP 20 54729 0.28417 0.25469 -0.480226 -33.480226 -0.03 -0.29 SEP 25 54734 0.27474 0.23769 -0.484909 -33.484909 0.04 -0.22 SEP 30 54739 0.26647 0.22289 -0.489563 -33.489563 0.00 -0.51 OCT 5 54744 0.25432 0.20980 -0.494480 -33.494480 0.07 -0.24 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. OCT 10 54749 0.24235 0.19789 -0.499065 -33.499065 -0.05 -0.64 OCT 15 54754 0.22976 0.18475 -0.503994 -33.503994 -0.05 -0.33 OCT 20 54759 0.21628 0.17277 -0.510146 -33.510146 -0.02 -0.21 OCT 25 54764 0.20126 0.16256 -0.516565 -33.516565 0.02 -0.04 OCT 30 54769 0.18851 0.15443 -0.522869 -33.522869 0.02 -0.04 NOV 4 54774 0.17344 0.14770 -0.528806 -33.528806 0.02 -0.04 NOV 9 54779 0.15714 0.14205 -0.534265 -33.534265 0.00 0.00 NOV 14 54784 0.13848 0.13722 -0.539543 -33.539543 0.00 0.00 NOV 19 54789 0.12051 0.13320 -0.544781 -33.544781 0.00 0.00 NOV 24 54794 0.10165 0.13134 -0.550009 -33.550009 0.00 0.00 NOV 29 54799 0.08327 0.13097 -0.555183 -33.555183 0.00 0.00 DEC 4 54804 0.06585 0.13167 -0.560253 -33.560253 0.00 0.00 DEC 9 54809 0.04891 0.13412 -0.565245 -33.565245 0.00 0.00 DEC 14 54814 0.03008 0.13695 -0.570143 -33.570143 0.00 0.00 DEC 19 54819 0.01056 0.14232 -0.574915 -33.574915 0.00 0.00 DEC 24 54824 -0.00881 0.14814 -0.579596 -33.579596 0.00 0.00 Note. In UT1R, the effects of zonal tides with periods shorter than 35 days are removed ; UT1-UT1R (smaller than 0.0025s in absolute value) should be added after quadratic interpolation of UT1R. Section 2 of this Bulletin gives the daily interpolation of x, y, UT1, duration of day, dX, and dY. IERS, B 249 (2) 2 - SMOOTHED VALUES OF x, y, UT1, D, dX, dY (IERS EVALUATION) at one-day intervals. For smoothing characteristics, see Table2 in the explanatory supplement. The reference system is described in the 2007 IERS Annual Report. 2008 MJD x y UT1-UTC UT1-UT1R D dX dY (0 h UTC) " " s ms ms 0.001" 0.001" SEP 5 54714 0.29867 0.30358 -0.468473 -1.353 0.390 0.08 -0.47 SEP 6 54715 0.29827 0.29997 -0.468774 -1.049 0.230 0.08 -0.38 SEP 7 54716 0.29789 0.29648 -0.468969 -0.594 0.124 0.12 -0.31 SEP 8 54717 0.29755 0.29309 -0.469069 -0.049 0.120 0.19 -0.31 SEP 9 54718 0.29728 0.28985 -0.469208 0.512 0.203 0.25 -0.39 SEP 10 54719 0.29689 0.28673 -0.469479 1.013 0.315 0.25 -0.48 SEP 11 54720 0.29646 0.28380 -0.469859 1.381 0.488 0.21 -0.53 SEP 12 54721 0.29582 0.28085 -0.470480 1.558 0.767 0.16 -0.50 SEP 13 54722 0.29448 0.27778 -0.471407 1.508 1.089 0.14 -0.47 SEP 14 54723 0.29281 0.27462 -0.472634 1.229 1.339 0.17 -0.47 SEP 15 54724 0.29147 0.27134 -0.474101 0.765 1.529 0.20 -0.50 SEP 16 54725 0.29046 0.26821 -0.475703 0.206 1.619 0.20 -0.54 SEP 17 54726 0.28940 0.26511 -0.477355 -0.328 1.570 0.15 -0.54 SEP 18 54727 0.28786 0.26175 -0.478812 -0.716 1.372 0.07 -0.49 SEP 19 54728 0.28599 0.25823 -0.480010 -0.870 1.090 -0.01 -0.39 SEP 20 54729 0.28417 0.25469 -0.480996 -0.770 0.846 -0.03 -0.29 SEP 21 54730 0.28222 0.25128 -0.481684 -0.463 0.647 -0.02 -0.30 SEP 22 54731 0.28018 0.24789 -0.482263 -0.053 0.565 0.01 -0.30 SEP 23 54732 0.27832 0.24436 -0.482856 0.333 0.604 0.04 -0.30 SEP 24 54733 0.27654 0.24096 -0.483546 0.582 0.709 0.06 -0.26 SEP 25 54734 0.27474 0.23769 -0.484289 0.621 0.929 0.04 -0.22 SEP 26 54735 0.27302 0.23446 -0.485363 0.435 1.167 0.01 -0.22 SEP 27 54736 0.27131 0.23110 -0.486620 0.065 1.317 -0.01 -0.26 SEP 28 54737 0.26980 0.22798 -0.487969 -0.403 1.418 -0.02 -0.33 SEP 29 54738 0.26829 0.22543 -0.489415 -0.863 1.402 -0.01 -0.43 SEP 30 54739 0.26647 0.22289 -0.490779 -1.216 1.287 0.00 -0.51 OCT 1 54740 0.26457 0.22035 -0.492002 -1.392 1.103 0.01 -0.58 OCT 2 54741 0.26247 0.21773 -0.492999 -1.357 0.866 0.02 -0.59 OCT 3 54742 0.25982 0.21504 -0.493744 -1.117 0.640 0.04 -0.50 OCT 4 54743 0.25684 0.21236 -0.494298 -0.708 0.452 0.06 -0.34 OCT 5 54744 0.25432 0.20980 -0.494668 -0.187 0.363 0.07 -0.24 OCT 6 54745 0.25210 0.20763 -0.495048 0.375 0.338 0.07 -0.24 OCT 7 54746 0.24968 0.20563 -0.495355 0.906 0.396 0.05 -0.37 OCT 8 54747 0.24717 0.20351 -0.495849 1.331 0.566 0.01 -0.55 OCT 9 54748 0.24481 0.20086 -0.496556 1.591 0.780 -0.03 -0.67 OCT 10 54749 0.24235 0.19789 -0.497423 1.641 1.009 -0.05 -0.64 OCT 11 54750 0.23964 0.19475 -0.498549 1.463 1.249 -0.04 -0.47 OCT 12 54751 0.23708 0.19176 -0.499923 1.074 1.455 -0.02 -0.28 OCT 13 54752 0.23478 0.18918 -0.501447 0.538 1.566 -0.02 -0.18 OCT 14 54753 0.23251 0.18686 -0.503002 -0.039 1.575 -0.03 -0.22 OCT 15 54754 0.22976 0.18475 -0.504522 -0.529 1.458 -0.05 -0.33 OCT 16 54755 0.22703 0.18254 -0.505947 -0.817 1.297 -0.06 -0.43 OCT 17 54756 0.22441 0.18034 -0.507137 -0.845 1.132 -0.05 -0.41 OCT 18 54757 0.22161 0.17789 -0.508177 -0.631 0.979 -0.03 -0.31 OCT 19 54758 0.21892 0.17522 -0.509045 -0.269 0.948 -0.02 -0.22 OCT 20 54759 0.21628 0.17277 -0.510036 0.110 1.015 -0.02 -0.21 OCT 21 54760 0.21372 0.17059 -0.511118 0.381 1.155 -0.03 -0.31 OCT 22 54761 0.21132 0.16870 -0.512325 0.461 1.324 -0.01 -0.51 OCT 23 54762 0.20848 0.16687 -0.513729 0.327 1.487 0.01 -0.62 OCT 24 54763 0.20503 0.16492 -0.515324 0.014 1.626 0.03 -0.51 OCT 25 54764 0.20126 0.16256 -0.516969 -0.404 1.654 0.02 -0.04 OCT 26 54765 0.19777 0.15993 -0.518567 -0.836 1.597 0.02 -0.04 OCT 27 54766 0.19528 0.15787 -0.520203 -1.190 1.542 0.02 -0.04 OCT 28 54767 0.19333 0.15669 -0.521702 -1.396 1.420 0.02 -0.04 OCT 29 54768 0.19117 0.15578 -0.523004 -1.408 1.176 0.02 -0.04 OCT 30 54769 0.18851 0.15443 -0.524089 -1.220 0.963 0.02 -0.04 OCT 31 54770 0.18568 0.15297 -0.524969 -0.853 0.817 0.02 -0.04 NOV 1 54771 0.18263 0.15147 -0.525686 -0.357 0.669 0.02 -0.04 NOV 2 54772 0.17947 0.14969 -0.526313 0.201 0.620 0.02 -0.04 NOV 3 54773 0.17647 0.14846 -0.526925 0.750 0.622 0.02 -0.04 NOV 4 54774 0.17344 0.14770 -0.527587 1.219 0.721 0.02 -0.04 NOV 5 54775 0.17047 0.14675 -0.528402 1.548 0.837 0.00 0.00 NOV 6 54776 0.16744 0.14564 -0.529355 1.692 1.026 0.00 0.00 NOV 7 54777 0.16406 0.14444 -0.530501 1.627 1.235 0.00 0.00 NOV 8 54778 0.16058 0.14324 -0.531848 1.353 1.432 0.00 0.00 NOV 9 54779 0.15714 0.14205 -0.533355 0.909 1.575 0.00 0.00 NOV 10 54780 0.15359 0.14091 -0.534950 0.371 1.624 0.00 0.00 NOV 11 54781 0.14990 0.13989 -0.536528 -0.150 1.553 0.00 0.00 NOV 12 54782 0.14603 0.13898 -0.537968 -0.535 1.369 0.00 0.00 NOV 13 54783 0.14215 0.13814 -0.539180 -0.692 1.122 0.00 0.00 NOV 14 54784 0.13848 0.13722 -0.540143 -0.600 0.894 0.00 0.00 NOV 15 54785 0.13503 0.13629 -0.540911 -0.319 0.764 0.00 0.00 NOV 16 54786 0.13171 0.13542 -0.541614 0.027 0.774 0.00 0.00 NOV 17 54787 0.12824 0.13461 -0.542389 0.299 0.915 0.00 0.00 NOV 18 54788 0.12445 0.13387 -0.543347 0.389 1.131 0.00 0.00 NOV 19 54789 0.12051 0.13320 -0.544519 0.262 1.348 0.00 0.00 NOV 20 54790 0.11654 0.13266 -0.545880 -0.054 1.506 0.00 0.00 NOV 21 54791 0.11256 0.13219 -0.547353 -0.479 1.571 0.00 0.00 NOV 22 54792 0.10875 0.13180 -0.548837 -0.918 1.540 0.00 0.00 NOV 23 54793 0.10516 0.13154 -0.550250 -1.282 1.429 0.00 0.00 NOV 24 54794 0.10165 0.13134 -0.551515 -1.505 1.262 0.00 0.00 NOV 25 54795 0.09816 0.13124 -0.552600 -1.546 1.067 0.00 0.00 NOV 26 54796 0.09466 0.13106 -0.553485 -1.392 0.873 0.00 0.00 NOV 27 54797 0.09099 0.13091 -0.554186 -1.058 0.706 0.00 0.00 NOV 28 54798 0.08709 0.13096 -0.554742 -0.586 0.592 0.00 0.00 NOV 29 54799 0.08327 0.13097 -0.555218 -0.034 0.543 0.00 0.00 NOV 30 54800 0.07962 0.13111 -0.555680 0.525 0.567 0.00 0.00 DEC 1 54801 0.07599 0.13139 -0.556199 1.023 0.658 0.00 0.00 DEC 2 54802 0.07248 0.13150 -0.556836 1.399 0.802 0.00 0.00 DEC 3 54803 0.06919 0.13153 -0.557637 1.609 0.980 0.00 0.00 DEC 4 54804 0.06585 0.13167 -0.558624 1.630 1.172 0.00 0.00 DEC 5 54805 0.06227 0.13195 -0.559795 1.459 1.352 0.00 0.00 DEC 6 54806 0.05877 0.13239 -0.561135 1.123 1.493 0.00 0.00 DEC 7 54807 0.05551 0.13288 -0.562581 0.676 1.563 0.00 0.00 DEC 8 54808 0.05230 0.13341 -0.564049 0.203 1.536 0.00 0.00 DEC 9 54809 0.04891 0.13412 -0.565437 -0.192 1.403 0.00 0.00 DEC 10 54810 0.04525 0.13481 -0.566651 -0.415 1.189 0.00 0.00 DEC 11 54811 0.04156 0.13531 -0.567633 -0.414 0.955 0.00 0.00 DEC 12 54812 0.03785 0.13572 -0.568408 -0.207 0.781 0.00 0.00 DEC 13 54813 0.03398 0.13622 -0.569068 0.108 0.732 0.00 0.00 DEC 14 54814 0.03008 0.13695 -0.569750 0.393 0.829 0.00 0.00 DEC 15 54815 0.02622 0.13778 -0.570588 0.517 1.034 0.00 0.00 DEC 16 54816 0.02230 0.13872 -0.571656 0.407 1.272 0.00 0.00 DEC 17 54817 0.01830 0.13982 -0.572940 0.074 1.460 0.00 0.00 DEC 18 54818 0.01440 0.14105 -0.574368 -0.402 1.547 0.00 0.00 DEC 19 54819 0.01056 0.14232 -0.575825 -0.910 1.518 0.00 0.00 DEC 20 54820 0.00656 0.14344 -0.577205 -1.343 1.395 0.00 0.00 DEC 21 54821 0.00249 0.14445 -0.578426 -1.625 1.212 0.00 0.00 DEC 22 54822 -0.00148 0.14552 -0.579453 -1.715 1.004 0.00 0.00 DEC 23 54823 -0.00520 0.14681 -0.580274 -1.602 0.800 0.00 0.00 DEC 24 54824 -0.00881 0.14814 -0.580900 -1.303 0.623 0.00 0.00 IERS, B 249 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2008 MJD x y UT1-UTC dX dY x y UT1 dX dY (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" SEP 5 54714 0.29866 0.30355 -0.468480 0.066 -.455 0.01 0.01 0.01 0.02 0.03 SEP 10 54719 0.29688 0.28669 -0.469476 0.289 -.458 0.01 0.01 0.01 0.02 0.03 SEP 15 54724 0.29147 0.27132 -0.474098 0.191 -.435 0.01 0.01 0.01 0.03 0.05 SEP 20 54729 0.28416 0.25467 -0.480999 -.059 -.171 0.01 0.01 0.01 0.03 0.05 SEP 25 54734 0.27474 0.23767 -0.484282 0.017 -.222 0.01 0.01 0.01 0.02 0.04 SEP 30 54739 0.26646 0.22287 -0.490778 -.046 -.486 0.01 0.01 0.01 0.02 0.05 OCT 5 54744 0.25432 0.20978 -0.494666 0.097 -.154 0.01 0.01 0.01 0.02 0.03 OCT 10 54749 0.24235 0.19786 -0.497422 -.046 -.688 0.01 0.01 0.03 0.12 0.13 OCT 15 54754 0.22976 0.18474 -0.504520 -.041 -.274 0.01 0.01 0.03 0.23 0.25 OCT 20 54759 0.21626 0.17275 -0.510032 - - 0.01 0.01 0.03 - - 4 - DURATION OF THE DAY AND ANGULAR VELOCITY OF THE EARTH (IERS evaluation). The data of this section are smoothed, with the same characteristics as UT1R in section 1. They are corrected for the effects of zonal tides with periods up to 35 days. Section 2 gives the daily interpolation of D. Date (0h UTC) DR OmegaR 2008 MJD s (microrad/s) SEP 5 54714 0.00061 72.921 15095 SEP 10 54719 0.00077 15082 SEP 15 54724 0.00100 15062 SEP 20 54729 0.00107 15057 SEP 25 54734 0.00086 15074 SEP 30 54739 0.00102 15061 OCT 5 54744 0.00092 15069 5 - INFORMATION ON TIME SCALES A leap second will be introduced in UTC on 31 December 2008 All information concerning time scales : announcements of the leap seconds (Bulletin C) and of the value of DUT1 (Bulletin D) can be found in our web/ftp site : World Wide Web : http://hpiers.obspm.fr Anonymous ftp : hpiers.obspm.fr or 145.238.100.28