BULLETIN B 461 1 July 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 0.037 0.038 0.0315 3.282 2.672 2026 5 2 61162 156.859 417.250 32.5068 0.460 -0.060 0.040 0.038 0.0143 4.095 3.771 2026 5 3 61163 157.978 417.066 32.2326 0.483 -0.050 0.038 0.035 0.0145 20.612 15.818 2026 5 4 61164 159.726 416.377 32.0840 0.506 -0.042 0.037 0.035 0.0272 21.865 16.732 2026 5 5 61165 161.252 416.079 32.0860 0.526 -0.035 0.040 0.036 0.1155 21.865 16.731 2026 5 6 61166 162.315 416.120 32.1478 0.539 -0.035 0.037 0.036 0.1087 21.646 16.566 2026 5 7 61167 163.183 416.191 32.1945 0.546 -0.039 0.036 0.037 0.0623 4.216 3.410 2026 5 8 61168 164.226 415.649 32.1978 0.545 -0.050 0.035 0.037 0.0544 0.540 0.634 2026 5 9 61169 164.997 415.253 32.0825 0.530 -0.074 0.037 0.036 0.0226 0.530 0.627 2026 5 10 61170 165.662 414.356 31.7175 0.504 -0.107 0.036 0.037 0.0130 0.490 0.573 2026 5 11 61171 167.156 413.419 31.0131 0.476 -0.142 0.036 0.036 0.0136 0.210 0.189 2026 5 12 61172 168.028 412.539 30.1446 0.449 -0.176 0.035 0.038 0.0195 0.209 0.188 2026 5 13 61173 169.101 411.670 29.1572 0.433 -0.202 0.036 0.039 0.0213 0.210 0.189 2026 5 14 61174 169.857 411.757 28.1235 0.424 -0.220 0.037 0.040 0.0219 0.247 0.296 2026 5 15 61175 170.478 411.684 27.1467 0.417 -0.226 0.039 0.039 0.0303 0.255 0.319 2026 5 16 61176 171.316 412.181 26.3816 0.409 -0.198 0.039 0.037 0.0208 0.255 0.319 2026 5 17 61177 171.845 412.494 25.9189 0.401 -0.150 0.038 0.037 0.0141 0.293 0.448 2026 5 18 61178 172.735 412.878 25.6945 0.395 -0.102 0.037 0.038 0.0224 0.552 1.333 2026 5 19 61179 173.418 413.205 25.6032 0.393 -0.067 0.036 0.038 0.0736 0.553 1.336 2026 5 20 61180 174.225 413.027 25.5028 0.398 -0.081 0.035 0.038 0.1017 0.548 1.322 2026 5 21 61181 174.669 412.624 25.2148 0.409 -0.117 0.035 0.039 0.0359 0.193 0.323 2026 5 22 61182 175.214 411.850 24.6334 0.424 -0.160 0.035 0.039 0.0196 0.122 0.124 2026 5 23 61183 175.939 410.991 23.7752 0.457 -0.184 0.036 0.038 0.0140 0.122 0.124 2026 5 24 61184 177.322 410.288 22.7625 0.498 -0.194 0.040 0.040 0.0115 0.122 0.124 2026 5 25 61185 178.561 409.984 21.7363 0.534 -0.196 0.040 0.040 0.0145 0.060 0.079 2026 5 26 61186 179.295 409.620 20.7609 0.558 -0.191 0.039 0.039 0.0163 0.055 0.076 2026 5 27 61187 179.924 409.517 19.8461 0.563 -0.180 0.037 0.042 0.0139 0.056 0.076 2026 5 28 61188 180.540 409.443 19.0793 0.527 -0.159 0.037 0.041 0.0157 0.076 0.096 2026 5 29 61189 180.786 409.282 18.5009 0.478 -0.137 0.036 0.040 0.0202 0.131 0.148 2026 5 30 61190 181.107 408.567 18.0847 0.439 -0.129 0.037 0.041 0.0158 0.135 0.151 2026 5 31 61191 181.564 408.125 17.8400 0.411 -0.132 0.037 0.042 0.0119 0.275 0.200 2026 6 1 61192 182.002 407.673 17.7696 0.393 -0.142 0.037 0.042 0.0153 1.236 0.534 Preliminary extension 2026 6 2 61193 183.189 407.784 17.7746 0.385 -0.158 0.032 0.035 0.0276 1.239 0.535 2026 6 3 61194 184.536 408.228 17.7968 0.392 -0.176 0.031 0.032 0.0356 1.232 0.646 2026 6 4 61195 185.432 408.277 17.7323 0.407 -0.195 0.030 0.032 0.0372 0.674 9.411 2026 6 5 61196 185.870 408.329 17.4979 0.424 -0.214 0.029 0.032 0.0485 0.557 11.252 2026 6 6 61197 186.541 408.020 17.0619 0.435 -0.228 0.029 0.032 0.0219 0.557 11.256 2026 6 7 61198 186.870 407.675 16.4489 0.441 -0.239 0.029 0.032 0.0116 0.500 9.807 2026 6 8 61199 187.109 406.980 15.6639 0.441 -0.245 0.029 0.032 0.0097 0.120 0.093 2026 6 9 61200 187.375 406.528 14.7565 0.435 -0.247 0.029 0.032 0.0103 0.119 0.064 2026 6 10 61201 187.828 405.837 13.7878 0.412 -0.243 0.029 0.032 0.0113 0.118 0.064 2026 6 11 61202 188.281 405.111 12.9045 0.384 -0.236 0.029 0.032 0.0107 0.047 0.112 2026 6 12 61203 189.146 404.010 12.2279 0.357 -0.226 0.029 0.032 0.0097 0.032 0.121 2026 6 13 61204 190.383 403.259 11.8632 0.430 -0.256 0.029 0.032 0.0091 0.032 0.121 2026 6 14 61205 191.481 402.607 11.8080 0.520 -0.290 0.031 0.034 0.0092 0.034 0.114 2026 6 15 61206 192.476 402.139 11.9436 0.533 -0.284 0.034 0.037 0.0105 0.048 0.066 2026 6 16 61207 193.359 401.684 12.1438 0.411 -0.213 0.035 0.039 0.0134 0.051 0.070 2026 6 17 61208 193.961 401.154 12.3079 0.054 -0.028 0.035 0.039 0.0142 0.061 0.084 2026 6 18 61209 194.408 400.451 12.3265 0.320 -0.148 0.036 0.039 0.0140 0.500 0.500 2026 6 19 61210 195.392 399.742 12.2315 0.309 -0.141 0.035 0.039 0.0126 0.500 0.500 2026 6 20 61211 196.337 399.201 12.0143 0.294 -0.137 0.035 0.039 0.0093 0.500 0.500 2026 6 21 61212 196.910 398.383 11.6718 0.282 -0.133 0.035 0.039 0.0084 0.500 0.500 2026 6 22 61213 197.531 397.311 11.3668 0.280 -0.128 0.036 0.039 0.0110 0.500 0.500 2026 6 23 61214 198.866 396.218 11.1548 0.286 -0.119 0.035 0.039 0.0174 0.500 0.500 2026 6 24 61215 200.400 395.307 11.1211 0.296 -0.110 0.034 0.038 0.0177 0.500 0.500 2026 6 25 61216 201.644 394.471 11.2813 0.305 -0.105 0.034 0.038 0.0183 0.500 0.500 2026 6 26 61217 202.503 393.687 11.6246 0.311 -0.107 0.035 0.038 0.0312 0.500 0.500 2026 6 27 61218 203.183 392.627 12.1236 0.314 -0.112 0.035 0.039 0.0596 0.500 0.500 2026 6 28 61219 203.814 391.729 12.7266 0.317 -0.117 0.036 0.039 0.0264 0.500 0.500 2026 6 29 61220 204.301 390.839 13.3664 0.324 -0.117 0.036 0.039 0.0179 0.500 0.500 2026 6 30 61221 204.792 389.887 13.9954 0.331 -0.116 0.039 0.042 0.0227 0.500 0.500 2026 7 1 61222 205.259 389.108 14.5382 0.338 -0.120 0.052 0.057 0.0334 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 5 2 61162 -110.799 -11.793 10.293 3.771 2026 5 3 61163 -110.806 -12.079 51.815 15.818 2026 5 4 61164 -110.873 -12.244 54.965 16.732 2026 5 5 61165 -110.881 -12.276 54.964 16.731 2026 5 6 61166 -110.793 -12.314 54.414 16.566 2026 5 7 61167 -110.633 -12.437 10.598 3.410 2026 5 8 61168 -110.411 -12.537 1.356 0.634 2026 5 9 61169 -110.162 -12.470 1.332 0.627 2026 5 10 61170 -110.020 -12.268 1.232 0.573 2026 5 11 61171 -110.176 -12.151 0.528 0.189 2026 5 12 61172 -110.596 -12.236 0.526 0.188 2026 5 13 61173 -110.992 -12.328 0.527 0.189 2026 5 14 61174 -111.285 -12.159 0.621 0.296 2026 5 15 61175 -111.713 -11.802 0.641 0.319 2026 5 16 61176 -112.409 -11.615 0.641 0.319 2026 5 17 61177 -113.047 -11.823 0.736 0.448 2026 5 18 61178 -113.210 -12.223 1.388 1.333 2026 5 19 61179 -112.885 -12.496 1.390 1.336 2026 5 20 61180 -112.382 -12.610 1.378 1.322 2026 5 21 61181 -111.990 -12.644 0.485 0.323 2026 5 22 61182 -111.847 -12.597 0.307 0.124 2026 5 23 61183 -111.950 -12.392 0.307 0.124 2026 5 24 61184 -112.206 -12.106 0.307 0.124 2026 5 25 61185 -112.398 -11.909 0.150 0.079 2026 5 26 61186 -112.393 -11.862 0.139 0.076 2026 5 27 61187 -112.279 -11.876 0.140 0.076 2026 5 28 61188 -112.270 -11.883 0.192 0.096 2026 5 29 61189 -112.379 -11.962 0.330 0.148 2026 5 30 61190 -112.556 -12.215 0.339 0.151 2026 5 31 61191 -112.773 -12.565 0.691 0.200 2026 6 1 61192 -112.977 -12.796 3.106 0.534 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 5 2 61162 0.3371 0.0097 15.04106711999 0.00000000169 2026 5 3 61163 0.2064 0.0088 15.04106714274 0.00000000153 2026 5 4 61164 0.0758 0.0087 15.04106716547 0.00000000151 2026 5 5 61165 -0.0446 0.0077 15.04106718643 0.00000000134 2026 5 6 61166 -0.0635 0.0071 15.04106718972 0.00000000124 2026 5 7 61167 -0.0367 0.0075 15.04106718506 0.00000000131 2026 5 8 61168 0.0448 0.0097 15.04106717087 0.00000000169 2026 5 9 61169 0.2209 0.0088 15.04106714021 0.00000000153 2026 5 10 61170 0.5242 0.0118 15.04106708741 0.00000000205 2026 5 11 61171 0.8207 0.0099 15.04106703580 0.00000000172 2026 5 12 61172 0.9394 0.0087 15.04106701513 0.00000000151 2026 5 13 61173 1.0265 0.0068 15.04106699997 0.00000000118 2026 5 14 61174 1.0225 0.0069 15.04106700067 0.00000000120 2026 5 15 61175 0.8923 0.0088 15.04106702333 0.00000000153 2026 5 16 61176 0.6226 0.0078 15.04106707028 0.00000000136 2026 5 17 61177 0.3255 0.0089 15.04106712201 0.00000000155 2026 5 18 61178 0.1336 0.0089 15.04106715541 0.00000000155 2026 5 19 61179 0.0756 0.0085 15.04106716551 0.00000000148 2026 5 20 61180 0.1673 0.0073 15.04106714955 0.00000000127 2026 5 21 61181 0.4244 0.0081 15.04106710479 0.00000000141 2026 5 22 61182 0.7267 0.0080 15.04106705216 0.00000000139 2026 5 23 61183 0.9640 0.0072 15.04106701085 0.00000000125 2026 5 24 61184 1.0440 0.0085 15.04106699692 0.00000000148 2026 5 25 61185 1.0104 0.0091 15.04106700277 0.00000000158 2026 5 26 61186 0.9488 0.0089 15.04106701350 0.00000000155 2026 5 27 61187 0.8539 0.0079 15.04106703002 0.00000000138 2026 5 28 61188 0.6766 0.0069 15.04106706088 0.00000000120 2026 5 29 61189 0.4944 0.0096 15.04106709260 0.00000000167 2026 5 30 61190 0.3283 0.0081 15.04106712152 0.00000000141 2026 5 31 61191 0.1563 0.0102 15.04106715146 0.00000000178 2026 6 1 61192 0.0131 0.0093 15.04106717639 0.00000000162 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [61162-61192] No leap second introduced during period [61162-61192] 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 49 3 - 31 30 10 61165.21 to 61189.27 80 85 14 - 27 51 GSFC gsf2023a.eoxy 48 52 3 8 33 32 11 61165.21 to 61189.27 166 205 26 7 50 36 IAA iaa2021a.eops 658 655 29 - 463 498 11 61165.21 to 61189.27 223 187 14 - 48 36 USNO usn2025b.eoxy 34 42 3 - 39 39 8 61165.21 to 61189.27 91 66 15 - 44 28 IVS * ivs2025a.eoxy 254 400 28 - 197 187 8 61165.21 to 61189.28 134 146 18 - 5 4 ASI asi2023a.eoxy 82 112 11 - 140 144 11 61165.21 to 61189.27 2516 1688 38 - 137 152 VIE vie2023a.eopxy 148 165 9 - - - 18 61165.00 to 61190.00 264 283 9 - - - VIE vie2023a.eoxy - - - - 32 40 11 61165.21 to 61189.27 - - - - 62 13 VLBI Intensive GSI * gsiint2d.eopi - - 5 - - - 10 61162.33 to 61191.33 - - 18 - - - BKG * bkg2025b.eopi - - 7 - - - 67 61162.33 to 61191.40 - - 27 - - - GSFC * gsf2023a.eopi - - 10 - - - 77 61162.33 to 61191.50 - - 54 - - - IAA * iaa2021a.eopi - - 6 - - - 78 61162.33 to 61191.50 - - 28 - - - IAA * iaaq.eopi - - 42 - - - 28 61162.31 to 61191.31 - - 79 - - - USNO * usn2025b.eopi - - 12 - - - 70 61162.33 to 61191.50 - - 26 - - - VIE vie2023a.eopi - - 6 - - - 79 61162.33 to 61191.50 - - 99 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 61162.50 to 61191.50 29 32 - 13 - - JPL JPL0OPSFIN 4 4 - 3 - - 30 61162.50 to 61191.50 37 43 - 19 - - GFZ GFZ0OPSFIN 7 6 - 1 - - 30 61162.50 to 61191.50 38 43 - 13 - - ESA ESA0OPSFIN 5 5 - 1 - - 30 61162.50 to 61191.50 33 38 - 12 - - SIO SIO0OPSFIN 24 22 - 9 - - 30 61162.50 to 61191.50 46 47 - 19 - - EMR EMR0OPSRAP 3 2 - 1 - - 30 61162.50 to 61191.50 51 71 - 14 - - IAA gnss.res 0 0 - 0 - - 29 61162.50 to 61191.50 54 61 - 24 - - GRGS GRG0OPSFIN 265 265 - 0 - - 30 61162.50 to 61191.50 29 33 - 13 - - ASI asi*.erp 10 9 - 0 - - 19 61162.50 to 61190.50 24 21 - 57 - - MIT MIT0OPSFIN 9 9 - 1 - - 30 61162.50 to 61191.50 48 46 - 14 - - IGS * IGS0OPSRAP 11 8 - 2 - - 30 61162.50 to 61191.50 34 35 - 12 - - IGS * IGS0OPSFIN 6 7 - 2 - - 30 61162.50 to 61191.50 34 32 - 14 - - SLR MCC tg*.02 216 277 - 31 - - 31 61162.00 to 61192.00 186 218 - 219 - - IAA slr_v.dat 75 87 - 4 - - 31 61162.00 to 61192.00 240 361 - 24 - - ASI asi.*.eop 61 71 - 17 - - 30 61162.50 to 61191.50 211 212 - 86 - - ILRS * ilrsa.eop 50 57 - 11 - - 30 61162.50 to 61191.50 147 149 - 48 - - BULLETIN A NEOS mark3.out 18 18 12 - - - 31 61162.00 to 61192.00 50 44 21 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html