BULLETIN B 459 1 May 2026 Contents are described in https://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf 1 - DAILY FINAL VALUES OF x, y, UT1-UTC, dX, dY Angular unit is milliarcsecond (mas), time unit is millisecond (ms). Upgraded solution from March 1 2017 - consistent with ITRF 2014. DATE MJD x y UT1-UTC dX dY x err y err UT1 err dX err dY err (0 h UTC) mas mas ms mas mas mas mas ms mas mas Final values Mean formal error 0.036 0.041 0.1250 4.597 1.337 2026 3 2 61101 104.942 389.676 66.9336 0.368 -0.168 0.030 0.032 0.0075 0.066 0.058 2026 3 3 61102 105.329 390.179 66.3877 0.344 -0.199 0.037 0.037 0.0109 0.065 0.058 2026 3 4 61103 105.598 391.082 65.6663 0.384 -0.156 0.039 0.038 0.0192 0.066 0.058 2026 3 5 61104 105.219 392.022 64.8617 0.443 -0.082 0.038 0.039 0.0244 0.073 0.063 2026 3 6 61105 104.791 392.363 64.1129 0.493 -0.002 0.037 0.040 0.0171 0.074 0.064 2026 3 7 61106 104.918 392.682 63.5045 0.478 0.051 0.035 0.038 0.0140 0.074 0.064 2026 3 8 61107 104.027 393.198 63.0980 0.421 0.082 0.038 0.042 0.0144 0.078 0.068 2026 3 9 61108 103.153 393.302 62.8870 0.347 0.098 0.034 0.040 0.0147 0.105 0.093 2026 3 10 61109 102.928 393.949 62.7666 0.269 0.102 0.034 0.036 0.0156 0.105 0.094 2026 3 11 61110 103.200 394.261 62.6937 0.210 0.087 0.034 0.036 0.0210 0.263 0.144 2026 3 12 61111 103.027 394.955 62.6787 0.165 0.062 0.034 0.038 0.0344 12.395 4.000 2026 3 13 61112 102.817 395.407 62.6714 0.131 0.030 0.036 0.037 0.0511 14.856 4.782 2026 3 14 61113 102.832 396.042 62.5435 0.121 -0.003 0.036 0.038 0.0226 14.861 4.784 2026 3 15 61114 103.184 396.903 62.2172 0.128 -0.034 0.036 0.038 0.0141 13.797 4.299 2026 3 16 61115 104.084 397.582 61.6502 0.148 -0.062 0.036 0.042 0.0408 6.425 0.937 2026 3 17 61116 104.756 398.758 60.8427 0.176 -0.082 0.035 0.042 0.1650 6.404 0.927 2026 3 18 61117 105.018 399.479 59.8464 0.211 -0.086 0.036 0.041 0.4069 6.549 0.951 2026 3 19 61118 105.661 400.154 58.6971 0.249 -0.079 0.034 0.042 0.4944 18.614 3.001 2026 3 20 61119 106.191 400.838 57.5157 0.288 -0.064 0.037 0.045 0.9186 21.233 3.446 2026 3 21 61120 106.426 401.642 56.4756 0.322 -0.041 0.038 0.045 0.9208 17.474 2.842 2026 3 22 61121 107.138 402.180 55.6874 0.353 -0.014 0.036 0.044 0.2732 1.301 0.240 2026 3 23 61122 108.147 402.986 55.1987 0.376 0.013 0.038 0.043 0.0715 0.053 0.039 2026 3 24 61123 109.447 403.443 54.9765 0.394 0.036 0.037 0.046 0.0383 0.031 0.034 2026 3 25 61124 110.773 404.017 54.9084 0.405 0.043 0.035 0.048 0.0326 0.041 0.062 2026 3 26 61125 112.273 404.985 54.8583 0.411 0.038 0.036 0.047 0.0467 0.844 2.214 2026 3 27 61126 113.994 406.237 54.7156 0.416 0.024 0.038 0.047 0.0651 1.008 2.654 2026 3 28 61127 115.974 407.133 54.3734 0.423 -0.003 0.040 0.047 0.0312 1.009 2.655 2026 3 29 61128 118.707 407.914 53.7629 0.433 -0.034 0.039 0.048 0.0185 1.048 2.337 2026 3 30 61129 121.013 408.876 52.9200 0.446 -0.063 0.039 0.045 0.0193 1.317 0.175 2026 3 31 61130 122.733 409.103 51.9540 0.463 -0.084 0.037 0.044 0.0261 1.311 0.168 2026 4 1 61131 124.644 409.404 50.9765 0.487 -0.083 0.036 0.043 0.0252 0.989 0.138 Preliminary extension 2026 4 2 61132 126.436 410.166 50.0230 0.513 -0.072 0.030 0.035 0.0188 0.115 0.059 2026 4 3 61133 127.833 411.327 49.2013 0.518 -0.064 0.029 0.033 0.0153 0.062 0.054 2026 4 4 61134 129.521 412.056 48.5889 0.505 -0.060 0.029 0.033 0.0129 0.061 0.054 2026 4 5 61135 131.626 412.611 48.1661 0.488 -0.057 0.029 0.033 0.0125 0.066 0.060 2026 4 6 61136 133.564 413.282 47.9212 0.471 -0.053 0.029 0.033 0.0137 0.162 0.186 2026 4 7 61137 135.363 413.576 47.8162 0.462 -0.047 0.028 0.033 0.0187 0.162 0.186 2026 4 8 61138 136.876 413.536 47.7614 0.468 -0.039 0.028 0.033 0.0265 0.170 0.209 2026 4 9 61139 138.527 413.695 47.7150 0.511 -0.021 0.028 0.033 0.0442 0.551 1.250 2026 4 10 61140 139.783 413.657 47.5908 0.558 -0.006 0.029 0.033 0.0807 1.562 4.014 2026 4 11 61141 141.197 413.814 47.3087 0.587 -0.006 0.029 0.033 0.0390 1.623 4.180 2026 4 12 61142 142.407 414.226 46.8585 0.594 -0.022 0.029 0.033 0.0228 1.419 3.648 2026 4 13 61143 143.281 414.466 46.1743 0.579 -0.054 0.029 0.033 0.0170 0.037 0.038 2026 4 14 61144 144.190 414.571 45.2235 0.540 -0.105 0.029 0.033 0.0144 0.033 0.028 2026 4 15 61145 145.295 414.948 44.0895 0.518 -0.218 0.029 0.033 0.0143 0.036 0.032 2026 4 16 61146 145.773 415.214 42.8465 0.308 -0.165 0.030 0.033 0.0141 0.500 0.500 2026 4 17 61147 146.675 415.284 41.5906 0.292 -0.152 0.030 0.033 0.0124 0.500 0.500 2026 4 18 61148 147.622 415.400 40.5476 0.284 -0.138 0.030 0.033 0.0111 0.500 0.500 2026 4 19 61149 148.318 415.615 39.7865 0.284 -0.124 0.032 0.035 0.0117 0.500 0.500 2026 4 20 61150 149.265 416.092 39.2887 0.292 -0.114 0.035 0.039 0.0134 0.500 0.500 2026 4 21 61151 149.992 415.978 39.0096 0.302 -0.108 0.035 0.040 0.0152 0.500 0.500 2026 4 22 61152 150.944 416.308 38.8415 0.313 -0.109 0.034 0.040 0.0144 0.500 0.500 2026 4 23 61153 151.687 416.798 38.6451 0.322 -0.116 0.034 0.040 0.0134 0.500 0.500 2026 4 24 61154 152.544 417.136 38.3085 0.327 -0.127 0.034 0.040 0.0125 0.500 0.500 2026 4 25 61155 153.585 417.860 37.8000 0.330 -0.138 0.034 0.040 0.0110 0.500 0.500 2026 4 26 61156 154.587 418.554 37.0900 0.329 -0.145 0.035 0.040 0.0111 0.500 0.500 2026 4 27 61157 155.238 419.170 36.2378 0.327 -0.147 0.035 0.040 0.0122 0.500 0.500 2026 4 28 61158 155.434 419.423 35.2619 0.322 -0.144 0.036 0.040 0.0143 0.500 0.500 2026 4 29 61159 155.478 419.000 34.3507 0.317 -0.140 0.037 0.041 0.0167 0.500 0.500 2026 4 30 61160 155.468 418.181 33.5487 0.312 -0.138 0.052 0.047 0.0240 0.500 0.500 2026 5 1 61161 155.847 417.161 32.9186 0.309 -0.138 0.098 0.072 0.0393 0.500 0.500 2 - DAILY FINAL VALUES OF CELESTIAL POLE OFFSETS dPsi1980 & dEps1980 dPsi1980 dEps1980 ....dPsi,dEps / IAU 1980 precession-nutation model Description : ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf The Reference Systems are described in the 2006 IERS Annual Report. DATE MJD dPsi1980 dEps1980 sig dPsi sig dEps (0 h UTC) mas mas mas mas 2026 3 2 61101 -112.861 -9.534 0.165 0.058 2026 3 3 61102 -112.659 -9.386 0.164 0.058 2026 3 4 61103 -112.440 -9.211 0.165 0.058 2026 3 5 61104 -112.341 -9.154 0.182 0.063 2026 3 6 61105 -112.436 -9.244 0.186 0.064 2026 3 7 61106 -112.810 -9.403 0.186 0.064 2026 3 8 61107 -113.288 -9.489 0.196 0.068 2026 3 9 61108 -113.656 -9.462 0.263 0.093 2026 3 10 61109 -113.789 -9.432 0.264 0.094 2026 3 11 61110 -113.625 -9.552 0.661 0.144 2026 3 12 61111 -113.277 -9.845 31.160 4.000 2026 3 13 61112 -112.912 -10.179 37.344 4.782 2026 3 14 61113 -112.691 -10.394 37.359 4.784 2026 3 15 61114 -112.730 -10.448 34.684 4.299 2026 3 16 61115 -112.941 -10.407 16.153 0.937 2026 3 17 61116 -113.059 -10.315 16.099 0.927 2026 3 18 61117 -112.914 -10.127 16.463 0.951 2026 3 19 61118 -112.655 -9.837 46.793 3.001 2026 3 20 61119 -112.624 -9.574 53.376 3.446 2026 3 21 61120 -112.976 -9.518 43.927 2.842 2026 3 22 61121 -113.481 -9.731 3.269 0.240 2026 3 23 61122 -113.762 -10.093 0.132 0.039 2026 3 24 61123 -113.639 -10.432 0.079 0.034 2026 3 25 61124 -113.226 -10.674 0.103 0.062 2026 3 26 61125 -112.752 -10.838 2.122 2.214 2026 3 27 61126 -112.345 -10.972 2.535 2.654 2026 3 28 61127 -111.991 -11.097 2.536 2.655 2026 3 29 61128 -111.663 -11.171 2.635 2.337 2026 3 30 61129 -111.398 -11.131 3.311 0.175 2026 3 31 61130 -111.241 -10.964 3.296 0.168 2026 4 1 61131 -111.145 -10.746 2.486 0.138 3 - EARTH ANGULAR VELOCITY : DAILY FINAL VALUES OF LOD, OMEGA AT 0hUTC LOD : Excess of the Length of day - 86400 s TAI OMEGA : Earth angular velocity Description: ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf DATE MJD LOD sigma OMEGA sigma (0 h UTC) ms ms mas/ms mas/ms 2026 3 2 61101 0.4302 0.0076 15.04106710378 0.00000000132 2026 3 3 61102 0.6500 0.0086 15.04106706551 0.00000000150 2026 3 4 61103 0.7783 0.0068 15.04106704318 0.00000000118 2026 3 5 61104 0.7987 0.0070 15.04106703963 0.00000000122 2026 3 6 61105 0.6913 0.0084 15.04106705832 0.00000000146 2026 3 7 61106 0.5145 0.0073 15.04106708910 0.00000000127 2026 3 8 61107 0.3060 0.0085 15.04106712540 0.00000000148 2026 3 9 61108 0.1464 0.0088 15.04106715318 0.00000000153 2026 3 10 61109 0.0863 0.0079 15.04106716365 0.00000000138 2026 3 11 61110 0.0436 0.0064 15.04106717108 0.00000000111 2026 3 12 61111 0.0013 0.0064 15.04106717844 0.00000000111 2026 3 13 61112 0.0461 0.0074 15.04106717064 0.00000000129 2026 3 14 61113 0.2148 0.0071 15.04106714128 0.00000000124 2026 3 15 61114 0.4418 0.0087 15.04106710176 0.00000000151 2026 3 16 61115 0.6876 0.0140 15.04106705897 0.00000000244 2026 3 17 61116 0.9143 0.0130 15.04106701950 0.00000000226 2026 3 18 61117 1.0837 0.0112 15.04106699001 0.00000000195 2026 3 19 61118 1.1890 0.0116 15.04106697168 0.00000000202 2026 3 20 61119 1.1403 0.0127 15.04106698016 0.00000000221 2026 3 21 61120 0.9290 0.0116 15.04106701694 0.00000000202 2026 3 22 61121 0.6408 0.0129 15.04106706712 0.00000000225 2026 3 23 61122 0.3446 0.0119 15.04106711868 0.00000000207 2026 3 24 61123 0.1197 0.0125 15.04106715783 0.00000000218 2026 3 25 61124 0.0312 0.0113 15.04106717324 0.00000000197 2026 3 26 61125 0.0815 0.0127 15.04106716448 0.00000000221 2026 3 27 61126 0.2284 0.0131 15.04106713891 0.00000000228 2026 3 28 61127 0.4716 0.0120 15.04106709657 0.00000000209 2026 3 29 61128 0.7417 0.0142 15.04106704955 0.00000000247 2026 3 30 61129 0.9260 0.0139 15.04106701747 0.00000000242 2026 3 31 61130 0.9920 0.0129 15.04106700598 0.00000000225 2026 4 1 61131 0.9715 0.0099 15.04106700955 0.00000000172 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [61101-61131] No leap second introduced during period [61101-61131] All information concerning time scales : - leap seconds announcements : Bulletin C - DUT1 announcements (UT1-UTC with 0.1 s accuracy) : Bulletin D can be found at : - web site : http://hpiers.obspm.fr/eop-pc/ - anonymous ftp://hpiers.obspm.fr/iers/ 5 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the individual series, some of them contributing to the combination (*) and their average agreement with it. The period covered is that one of Bulletin B. Units : micro-arc-seconds for x/y/dX/dY micro-seconds for UT1/LOD ----------------------------------------------------------------------------- EOP series first line : Mean formal uncertainty Periods covered second line : Weighted RMS agreement with Bulletin B ----------------------------------------------------------------------------- x y UT1 LOD dX dY Data Number VLBI Standards BKG bkg2025b.eoxy 41 47 2 - 30 28 12 61102.21 to 61130.21 57 90 14 - 134 90 GSFC gsf2023a.eoxy 52 57 3 7 32 33 14 61102.21 to 61130.21 147 142 17 8 110 71 IAA iaa2021a.eops 155 184 8 - 122 127 12 61102.21 to 61130.21 214 236 35 - 151 97 USNO usn2025b.eoxy 46 51 3 - 43 44 10 61102.21 to 61130.21 68 87 19 - 117 50 IVS * ivs2025a.eoxy 236 299 17 - 220 215 9 61102.22 to 61130.22 123 155 171 - 14 5 ASI asi2023a.eoxy 77 95 9 - 117 107 11 61102.21 to 61130.21 2842 1713 63 - 137 87 VIE vie2023a.eopxy 147 184 6 - - - 21 61102.00 to 61131.00 228 350 14 - - - VIE vie2023a.eoxy - - - - 36 35 12 61102.21 to 61130.21 - - - - 126 94 VLBI Intensive GSI * gsiint2d.eopi - - 12 - - - 3 61113.33 to 61121.33 - - 18 - - - BKG * bkg2025b.eopi - - 9 - - - 62 61101.29 to 61130.84 - - 53 - - - GSFC * gsf2023a.eopi - - 13 - - - 65 61101.29 to 61130.84 - - 81 - - - IAA * iaa2021a.eopi - - 11 - - - 67 61101.29 to 61130.84 - - 40 - - - IAA * iaaq.eopi - - 36 - - - 30 61101.40 to 61130.31 - - 68 - - - USNO * usn2025b.eopi - - 11 - - - 53 61101.75 to 61130.75 - - 25 - - - OPA opa2025b.eopi - - NaN - - - 0 00000.00 to 00000.00 - - 0 - - - VIE vie2023a.eopi - - 9 - - - 69 61101.29 to 61130.84 - - 56 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 61101.50 to 61130.50 30 23 - 10 - - JPL JPL0OPSFIN 4 4 - 4 - - 30 61101.50 to 61130.50 44 34 - 18 - - GFZ GFZ0OPSFIN 7 7 - 1 - - 30 61101.50 to 61130.50 44 41 - 12 - - ESA ESA0OPSFIN 5 5 - 1 - - 30 61101.50 to 61130.50 40 31 - 11 - - SIO SIO0OPSFIN 28 27 - 12 - - 30 61101.50 to 61130.50 51 37 - 19 - - EMR EMR0OPSRAP 3 3 - 1 - - 30 61101.50 to 61130.50 45 49 - 11 - - IAA gnss.res 0 0 - 0 - - 26 61101.50 to 61130.50 96 72 - 48 - - GRGS GRG0OPSFIN 272 272 - 0 - - 30 61101.50 to 61130.50 32 29 - 13 - - ASI asi*.erp 10 9 - 0 - - 13 61101.50 to 61113.50 32 20 - 56 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 61101.50 to 61130.50 57 41 - 17 - - IGS * IGS0OPSRAP 8 10 - 2 - - 30 61101.50 to 61130.50 42 32 - 12 - - IGS * IGS0OPSFIN 6 7 - 1 - - 30 61101.50 to 61130.50 28 27 - 13 - - SLR MCC tg*.02 199 288 - 31 - - 31 61101.00 to 61131.00 103 312 - 140 - - IAA slr_v.dat 83 100 - 5 - - 30 61101.00 to 61131.00 320 432 - 27 - - ASI asi.*.eop 50 69 - 16 - - 30 61101.50 to 61130.50 175 221 - 105 - - ILRS * ilrsa.eop 46 61 - 10 - - 30 61101.50 to 61130.50 142 209 - 33 - - BULLETIN A NEOS mark3.out 16 19 11 - - - 31 61101.00 to 61131.00 46 50 22 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html