BULLETIN B 455 2 January 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 0.034 0.031 0.0171 0.076 0.119 2025 11 2 60981 175.042 319.351 92.1959 0.401 0.026 0.034 0.027 0.0257 0.069 0.070 2025 11 3 60982 173.493 318.711 91.1241 0.376 0.022 0.035 0.027 0.0248 0.066 0.070 2025 11 4 60983 171.836 318.651 90.0458 0.371 0.001 0.035 0.028 0.0246 0.068 0.072 2025 11 5 60984 169.948 318.314 89.1617 0.416 -0.046 0.037 0.027 0.0250 0.079 0.084 2025 11 6 60985 167.886 318.223 88.5363 0.412 -0.051 0.037 0.028 0.0242 0.083 0.088 2025 11 7 60986 165.875 317.850 88.2167 0.345 -0.003 0.036 0.029 0.0228 0.070 0.073 2025 11 8 60987 164.031 317.090 88.1372 0.328 0.011 0.036 0.028 0.0224 0.068 0.070 2025 11 9 60988 162.965 316.276 88.1949 0.363 -0.008 0.038 0.029 0.0217 0.068 0.070 2025 11 10 60989 162.532 315.814 88.2007 0.412 -0.037 0.037 0.028 0.0212 0.065 0.070 2025 11 11 60990 161.541 315.276 88.0069 0.460 -0.064 0.037 0.028 0.0204 0.065 0.070 2025 11 12 60991 160.197 315.149 87.6273 0.450 -0.052 0.036 0.033 0.0109 0.065 0.070 2025 11 13 60992 158.350 315.364 87.1120 0.420 -0.024 0.040 0.039 0.0117 0.068 0.070 2025 11 14 60993 156.448 315.685 86.4380 0.388 0.009 0.038 0.039 0.0117 0.068 0.070 2025 11 15 60994 154.542 315.955 85.6632 0.334 0.066 0.035 0.033 0.0111 0.068 0.070 2025 11 16 60995 152.954 316.290 84.9392 0.293 0.119 0.036 0.034 0.0122 0.068 0.070 2025 11 17 60996 151.071 316.713 84.3286 0.300 0.139 0.036 0.033 0.0133 0.068 0.083 2025 11 18 60997 149.132 316.470 83.9031 0.383 0.102 0.030 0.028 0.0150 0.076 0.165 2025 11 19 60998 147.404 316.269 83.6568 0.589 -0.023 0.029 0.026 0.0152 0.096 0.399 2025 11 20 60999 145.638 316.133 83.5666 0.620 -0.108 0.028 0.026 0.0139 0.103 0.438 2025 11 21 61000 143.733 315.699 83.6284 0.505 -0.137 0.028 0.025 0.0138 0.090 0.163 2025 11 22 61001 141.863 314.918 83.8087 0.411 -0.135 0.028 0.025 0.0144 0.108 0.266 2025 11 23 61002 139.750 314.283 84.0303 0.350 -0.103 0.037 0.033 0.0148 0.121 0.347 2025 11 24 61003 138.018 313.571 84.2595 0.321 -0.060 0.037 0.035 0.0151 0.077 0.125 2025 11 25 61004 137.273 313.687 84.3128 0.329 -0.034 0.035 0.036 0.0142 0.068 0.072 2025 11 26 61005 136.030 314.555 84.1725 0.381 -0.069 0.036 0.035 0.0152 0.079 0.084 2025 11 27 61006 135.063 314.943 83.7678 0.470 -0.104 0.036 0.034 0.0178 0.084 0.088 2025 11 28 61007 134.340 315.261 83.0476 0.573 -0.113 0.037 0.035 0.0161 0.070 0.072 2025 11 29 61008 133.379 315.279 82.0910 0.575 -0.104 0.035 0.035 0.0137 0.068 0.069 2025 11 30 61009 132.493 315.677 80.9735 0.485 -0.083 0.035 0.035 0.0140 0.068 0.069 2025 12 1 61010 131.564 316.012 79.8419 0.354 -0.058 0.035 0.034 0.0146 0.067 0.070 Preliminary extension 2025 12 2 61011 130.206 316.151 78.8026 0.212 -0.034 0.036 0.038 0.0130 0.067 0.070 2025 12 3 61012 129.005 316.121 78.0189 0.125 -0.037 0.037 0.038 0.0112 0.067 0.070 2025 12 4 61013 127.977 316.169 77.5342 0.073 -0.047 0.032 0.032 0.0107 0.087 0.086 2025 12 5 61014 127.142 316.021 77.3725 0.051 -0.055 0.030 0.030 0.0106 0.091 0.089 2025 12 6 61015 126.467 316.222 77.4491 0.106 -0.036 0.030 0.030 0.0107 0.091 0.089 2025 12 7 61016 125.530 316.420 77.5989 0.207 -0.004 0.030 0.030 0.0114 0.088 0.086 2025 12 8 61017 124.924 316.668 77.6167 0.315 0.030 0.030 0.030 0.0129 0.065 0.068 2025 12 9 61018 123.902 316.843 77.3972 0.408 0.056 0.030 0.030 0.0139 0.065 0.068 2025 12 10 61019 122.824 316.730 76.9903 0.414 0.051 0.030 0.030 0.0133 0.065 0.068 2025 12 11 61020 121.639 316.852 76.4887 0.385 0.034 0.030 0.030 0.0124 0.065 0.069 2025 12 12 61021 120.831 316.496 75.9931 0.350 0.016 0.030 0.030 0.0121 0.065 0.069 2025 12 13 61022 120.490 316.611 75.5659 0.465 0.026 0.031 0.030 0.0123 0.065 0.069 2025 12 14 61023 120.229 316.651 75.1884 0.610 0.048 0.033 0.032 0.0122 0.066 0.070 2025 12 15 61024 120.158 317.362 74.9157 0.656 0.060 0.035 0.035 0.0129 0.073 0.076 2025 12 16 61025 118.938 318.096 74.8574 0.521 0.053 0.036 0.036 0.0142 0.078 0.081 2025 12 17 61026 117.548 318.126 74.9484 0.371 -0.092 0.036 0.036 0.0148 0.500 0.500 2025 12 18 61027 116.445 318.309 75.2201 0.369 -0.099 0.036 0.037 0.0148 0.500 0.500 2025 12 19 61028 115.236 318.416 75.6873 0.367 -0.101 0.037 0.036 0.0120 0.500 0.500 2025 12 20 61029 113.626 319.037 76.2421 0.369 -0.100 0.037 0.036 0.0108 0.500 0.500 2025 12 21 61030 112.812 319.373 76.8128 0.377 -0.103 0.037 0.036 0.0115 0.500 0.500 2025 12 22 61031 112.313 320.390 77.2806 0.386 -0.114 0.038 0.036 0.0137 0.500 0.500 2025 12 23 61032 111.215 321.215 77.5704 0.393 -0.135 0.038 0.036 0.0144 0.500 0.500 2025 12 24 61033 110.362 321.839 77.6204 0.394 -0.161 0.037 0.036 0.0143 0.500 0.500 2025 12 25 61034 109.132 322.682 77.4041 0.387 -0.181 0.037 0.036 0.0162 0.500 0.500 2025 12 26 61035 108.368 323.182 76.9321 0.376 -0.187 0.037 0.037 0.0177 0.500 0.500 2025 12 27 61036 107.975 324.125 76.2750 0.364 -0.178 0.037 0.037 0.0173 0.500 0.500 2025 12 28 61037 108.035 325.041 75.5700 0.353 -0.159 0.037 0.037 0.0169 0.500 0.500 2025 12 29 61038 109.052 326.207 74.9423 0.344 -0.142 0.038 0.037 0.0163 0.500 0.500 2025 12 30 61039 110.246 327.852 74.4558 0.338 -0.134 0.039 0.037 0.0179 0.500 0.500 2025 12 31 61040 110.711 329.583 74.1538 0.333 -0.139 0.040 0.038 0.0244 0.500 0.500 2026 1 1 61041 110.507 331.197 74.0715 0.333 -0.151 0.051 0.045 0.0357 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 2025 11 2 60981 -117.610 -8.969 0.175 0.070 2025 11 3 60982 -117.806 -8.771 0.167 0.070 2025 11 4 60983 -117.950 -8.569 0.172 0.072 2025 11 5 60984 -117.820 -8.624 0.199 0.084 2025 11 6 60985 -117.464 -8.839 0.208 0.088 2025 11 7 60986 -117.078 -8.877 0.176 0.073 2025 11 8 60987 -116.842 -8.680 0.171 0.070 2025 11 9 60988 -116.922 -8.512 0.170 0.070 2025 11 10 60989 -117.040 -8.608 0.164 0.070 2025 11 11 60990 -116.873 -8.821 0.164 0.070 2025 11 12 60991 -116.639 -8.788 0.164 0.070 2025 11 13 60992 -116.520 -8.452 0.171 0.070 2025 11 14 60993 -116.526 -8.042 0.172 0.070 2025 11 15 60994 -116.591 -7.737 0.172 0.070 2025 11 16 60995 -116.581 -7.560 0.172 0.070 2025 11 17 60996 -116.443 -7.470 0.172 0.083 2025 11 18 60997 -116.147 -7.524 0.190 0.165 2025 11 19 60998 -115.597 -7.847 0.242 0.399 2025 11 20 60999 -115.547 -8.273 0.259 0.438 2025 11 21 61000 -115.870 -8.582 0.226 0.163 2025 11 22 61001 -116.029 -8.637 0.271 0.266 2025 11 23 61002 -115.939 -8.484 0.303 0.347 2025 11 24 61003 -115.685 -8.307 0.194 0.125 2025 11 25 61004 -115.382 -8.209 0.172 0.072 2025 11 26 61005 -115.052 -8.162 0.200 0.084 2025 11 27 61006 -114.689 -8.053 0.211 0.088 2025 11 28 61007 -114.351 -7.933 0.176 0.072 2025 11 29 61008 -114.345 -7.888 0.171 0.069 2025 11 30 61009 -114.645 -7.837 0.170 0.069 2025 12 1 61010 -115.165 -7.646 0.167 0.070 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 2025 11 2 60981 1.0131 0.0129 15.04106700230 0.00000000225 2025 11 3 60982 1.0996 0.0135 15.04106698724 0.00000000235 2025 11 4 60983 1.0130 0.0143 15.04106700232 0.00000000249 2025 11 5 60984 0.7597 0.0132 15.04106704642 0.00000000230 2025 11 6 60985 0.4714 0.0129 15.04106709661 0.00000000225 2025 11 7 60986 0.1782 0.0130 15.04106714765 0.00000000226 2025 11 8 60987 -0.0080 0.0123 15.04106718006 0.00000000214 2025 11 9 60988 -0.0630 0.0131 15.04106718964 0.00000000228 2025 11 10 60989 0.0740 0.0127 15.04106716579 0.00000000221 2025 11 11 60990 0.2927 0.0121 15.04106712772 0.00000000211 2025 11 12 60991 0.4666 0.0116 15.04106709744 0.00000000202 2025 11 13 60992 0.5895 0.0139 15.04106707605 0.00000000242 2025 11 14 60993 0.7333 0.0148 15.04106705101 0.00000000258 2025 11 15 60994 0.7760 0.0149 15.04106704358 0.00000000259 2025 11 16 60995 0.6775 0.0206 15.04106706073 0.00000000359 2025 11 17 60996 0.5307 0.0190 15.04106708628 0.00000000331 2025 11 18 60997 0.3328 0.0145 15.04106712073 0.00000000252 2025 11 19 60998 0.1620 0.0133 15.04106715047 0.00000000232 2025 11 20 60999 0.0111 0.0135 15.04106717674 0.00000000235 2025 11 21 61000 -0.1287 0.0136 15.04106720108 0.00000000237 2025 11 22 61001 -0.2142 0.0140 15.04106721596 0.00000000244 2025 11 23 61002 -0.2296 0.0180 15.04106721864 0.00000000313 2025 11 24 61003 -0.1753 0.0185 15.04106720919 0.00000000322 2025 11 25 61004 0.0462 0.0173 15.04106717063 0.00000000301 2025 11 26 61005 0.2615 0.0152 15.04106713315 0.00000000265 2025 11 27 61006 0.5561 0.0157 15.04106708186 0.00000000273 2025 11 28 61007 0.8557 0.0173 15.04106702970 0.00000000301 2025 11 29 61008 1.0553 0.0162 15.04106699496 0.00000000282 2025 11 30 61009 1.1535 0.0194 15.04106697786 0.00000000338 2025 12 1 61010 1.1018 0.0187 15.04106698686 0.00000000326 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60981-61010] No leap second introduced during period [60981-61010] 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 62 56 4 - 41 39 12 60983.21 to 61007.27 101 152 30 - 43 35 GSFC gsf2023a.eoxy 64 57 4 13 40 39 12 60983.21 to 61007.27 131 177 33 9 42 34 IAA iaa2021a.eops 121 108 10 - 74 74 12 60983.21 to 61007.27 324 306 44 - 49 63 USNO usn2025a.eoxy 60 54 4 - 57 53 9 60983.21 to 61007.27 162 59 21 - 36 29 VIE vie2023a.eopxy 381 508 51 - - - 16 60983.00 to 61008.00 542 592 19 - - - VIE vie2023a.eoxy - - - - 61 57 10 60983.21 to 61007.27 - - - - 41 25 VLBI Intensive GSI * gsiint2d.eopi - - 16 - - - 9 60981.33 to 61009.33 - - 19 - - - BKG * bkg2025b.eopi - - 9 - - - 90 60981.33 to 61009.50 - - 35 - - - GSFC * gsf2023a.eopi - - 12 - - - 93 60981.33 to 61009.50 - - 83 - - - IAA * iaa2021a.eopi - - 9 - - - 91 60981.33 to 61009.50 - - 28 - - - IAA * iaaq.eopi - - 46 - - - 29 60981.31 to 61009.31 - - 70 - - - USNO * usn2025a.eopi - - 13 - - - 81 60981.33 to 61009.50 - - 44 - - - OPA opa2025b.eopi - - 9 - - - 62 60981.33 to 61009.50 - - 121 - - - VIE vie2023a.eopi - - 8 - - - 93 60981.33 to 61009.50 - - 110 - - - DGFI dgf2024a.eopi - - 8 - - - 35 60981.00 to 61009.33 - - 37 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 29 60981.50 to 61009.50 40 30 - 13 - - JPL JPL0OPSFIN 4 4 - 3 - - 29 60981.50 to 61009.50 45 44 - 20 - - GFZ GFZ0OPSFIN 4 4 - 1 - - 29 60981.50 to 61009.50 33 40 - 12 - - ESA ESA0OPSFIN 5 5 - 1 - - 29 60981.50 to 61009.50 35 35 - 11 - - SIO SIO0OPSFIN 26 24 - 10 - - 29 60981.50 to 61009.50 48 40 - 17 - - EMR EMR0OPSRAP 3 3 - 0 - - 29 60981.50 to 61009.50 55 47 - 13 - - IAA gnss.res 0 0 - 0 - - 20 60981.50 to 61008.50 60 79 - 15 - - GRGS GRG0OPSFIN 267 267 - 0 - - 29 60981.50 to 61009.50 34 36 - 10 - - ASI asi*.erp 10 9 - 0 - - 21 60981.50 to 61001.50 24 29 - 51 - - MIT MIT0OPSFIN 10 9 - 1 - - 29 60981.50 to 61009.50 53 48 - 13 - - IGS * IGS0OPSRAP 9 6 - 2 - - 29 60981.50 to 61009.50 45 34 - 10 - - IGS * IGS0OPSFIN 6 6 - 2 - - 29 60981.50 to 61009.50 29 29 - 11 - - SLR MCC tg*.02 218 213 - 31 - - 30 60981.00 to 61010.00 155 171 - 162 - - IAA slr_v.dat 82 93 - 5 - - 28 60981.00 to 61010.00 257 210 - 25 - - ILRS * ilrsa.eop 43 44 - 8 - - 29 60981.50 to 61009.50 102 121 - 23 - - BULLETIN A NEOS mark3.out 14 13 11 - - - 30 60981.00 to 61010.00 44 38 15 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html