********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 19 January 2017 Vol. XXX No. 003 ______________________________________________________________________ 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 = +0.6 seconds beginning 01 Jan 2017 at 0000 UTC = +0.5 seconds beginning 26 Jan 2017 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should by available by 20:00 UTC. * * * * A positive leap second WAS introduced in UTC on 31 December 2016. * * * * In the 05 Jan 2017 issue of IERS Bulletin A (Rapid Service/ * * Predictions of Earth Orientation information) -- Vol. XXX, No.001 * * -- an abbreviation for January (Jan) was used in the line above * * TAI-UTC = 37.000 000 seconds * * In subsequent issues of the IERS Bulletin A, abbreviations for * * the month will no longer be used in this line. * * * * Distribution statement A. Approved for public release: * * distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ 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 17 1 13 57766 0.06562 .00010 0.26755 .00009 0.574962 0.000010 17 1 14 57767 0.06404 .00009 0.26847 .00009 0.573725 0.000008 17 1 15 57768 0.06215 .00010 0.26933 .00009 0.572418 0.000006 17 1 16 57769 0.05972 .00010 0.27007 .00009 0.571074 0.000005 17 1 17 57770 0.05669 .00009 0.27068 .00009 0.569731 0.000006 17 1 18 57771 0.05334 .00009 0.27109 .00009 0.568471 0.000005 17 1 19 57772 0.04994 .00009 0.27154 .00009 0.567265 0.000005 _______________________________________________________________________ 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 = 0.1120 - 0.0789 cos A - 0.0641 sin A + 0.0159 cos C - 0.0302 sin C y = 0.3627 - 0.0604 cos A + 0.0756 sin A - 0.0302 cos C - 0.0159 sin C UT1-UTC = 0.5615 - 0.00127 (MJD - 57780) - (UT2-UT1) where A = 2*pi*(MJD-57772)/365.25 and C = 2*pi*(MJD-57772)/435. TAI-UTC(MJD 57773) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57772)**0.80 S t = 0.00025 (MJD-57772)**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) 2017 1 20 57773 0.0471 0.2718 0.56604 2017 1 21 57774 0.0445 0.2722 0.56490 2017 1 22 57775 0.0425 0.2728 0.56384 2017 1 23 57776 0.0409 0.2734 0.56288 2017 1 24 57777 0.0394 0.2741 0.56200 2017 1 25 57778 0.0380 0.2749 0.56120 2017 1 26 57779 0.0367 0.2757 0.56044 2017 1 27 57780 0.0354 0.2766 0.55965 2017 1 28 57781 0.0340 0.2776 0.55876 2017 1 29 57782 0.0326 0.2786 0.55770 2017 1 30 57783 0.0311 0.2796 0.55645 2017 1 31 57784 0.0297 0.2807 0.55504 2017 2 1 57785 0.0283 0.2817 0.55351 2017 2 2 57786 0.0270 0.2829 0.55191 2017 2 3 57787 0.0258 0.2840 0.55028 2017 2 4 57788 0.0245 0.2852 0.54868 2017 2 5 57789 0.0233 0.2865 0.54717 2017 2 6 57790 0.0220 0.2878 0.54576 2017 2 7 57791 0.0207 0.2891 0.54444 2017 2 8 57792 0.0193 0.2905 0.54317 2017 2 9 57793 0.0179 0.2919 0.54189 2017 2 10 57794 0.0165 0.2933 0.54056 2017 2 11 57795 0.0152 0.2947 0.53915 2017 2 12 57796 0.0139 0.2960 0.53765 2017 2 13 57797 0.0127 0.2974 0.53609 2017 2 14 57798 0.0116 0.2988 0.53452 2017 2 15 57799 0.0106 0.3001 0.53297 2017 2 16 57800 0.0096 0.3015 0.53147 2017 2 17 57801 0.0087 0.3030 0.53005 2017 2 18 57802 0.0078 0.3044 0.52871 2017 2 19 57803 0.0069 0.3059 0.52746 2017 2 20 57804 0.0061 0.3074 0.52629 2017 2 21 57805 0.0053 0.3090 0.52515 2017 2 22 57806 0.0045 0.3105 0.52402 2017 2 23 57807 0.0037 0.3121 0.52285 2017 2 24 57808 0.0030 0.3136 0.52159 2017 2 25 57809 0.0023 0.3152 0.52018 2017 2 26 57810 0.0016 0.3168 0.51860 2017 2 27 57811 0.0010 0.3184 0.51685 2017 2 28 57812 0.0004 0.3201 0.51493 2017 3 1 57813 -0.0002 0.3217 0.51293 2017 3 2 57814 -0.0007 0.3234 0.51090 2017 3 3 57815 -0.0012 0.3251 0.50894 2017 3 4 57816 -0.0017 0.3268 0.50709 2017 3 5 57817 -0.0022 0.3284 0.50537 2017 3 6 57818 -0.0027 0.3301 0.50376 2017 3 7 57819 -0.0031 0.3318 0.50223 2017 3 8 57820 -0.0034 0.3335 0.50070 2017 3 9 57821 -0.0038 0.3352 0.49913 2017 3 10 57822 -0.0041 0.3369 0.49748 2017 3 11 57823 -0.0043 0.3387 0.49573 2017 3 12 57824 -0.0045 0.3404 0.49391 2017 3 13 57825 -0.0047 0.3421 0.49204 2017 3 14 57826 -0.0049 0.3438 0.49018 2017 3 15 57827 -0.0050 0.3456 0.48836 2017 3 16 57828 -0.0051 0.3473 0.48661 2017 3 17 57829 -0.0051 0.3490 0.48495 2017 3 18 57830 -0.0051 0.3508 0.48339 2017 3 19 57831 -0.0051 0.3525 0.48192 2017 3 20 57832 -0.0051 0.3543 0.48051 2017 3 21 57833 -0.0050 0.3560 0.47914 2017 3 22 57834 -0.0049 0.3577 0.47776 2017 3 23 57835 -0.0047 0.3595 0.47633 2017 3 24 57836 -0.0046 0.3612 0.47480 2017 3 25 57837 -0.0044 0.3630 0.47313 2017 3 26 57838 -0.0041 0.3647 0.47128 2017 3 27 57839 -0.0039 0.3665 0.46926 2017 3 28 57840 -0.0036 0.3682 0.46710 2017 3 29 57841 -0.0032 0.3699 0.46489 2017 3 30 57842 -0.0029 0.3717 0.46271 2017 3 31 57843 -0.0025 0.3734 0.46063 2017 4 1 57844 -0.0020 0.3751 0.45870 2017 4 2 57845 -0.0016 0.3768 0.45692 2017 4 3 57846 -0.0011 0.3785 0.45527 2017 4 4 57847 -0.0006 0.3802 0.45367 2017 4 5 57848 0.0000 0.3819 0.45208 2017 4 6 57849 0.0006 0.3836 0.45044 2017 4 7 57850 0.0012 0.3852 0.44873 2017 4 8 57851 0.0018 0.3869 0.44695 2017 4 9 57852 0.0025 0.3886 0.44512 2017 4 10 57853 0.0032 0.3902 0.44328 2017 4 11 57854 0.0039 0.3918 0.44147 2017 4 12 57855 0.0047 0.3935 0.43973 2017 4 13 57856 0.0055 0.3951 0.43808 2017 4 14 57857 0.0063 0.3967 0.43654 2017 4 15 57858 0.0072 0.3983 0.43510 2017 4 16 57859 0.0081 0.3998 0.43375 2017 4 17 57860 0.0090 0.4014 0.43246 2017 4 18 57861 0.0099 0.4030 0.43120 2017 4 19 57862 0.0109 0.4045 0.42992 2017 4 20 57863 0.0119 0.4060 0.42856 2017 4 21 57864 0.0129 0.4075 0.42709 2017 4 22 57865 0.0139 0.4090 0.42546 2017 4 23 57866 0.0150 0.4105 0.42366 2017 4 24 57867 0.0161 0.4120 0.42171 2017 4 25 57868 0.0172 0.4134 0.41964 2017 4 26 57869 0.0183 0.4148 0.41756 2017 4 27 57870 0.0195 0.4162 0.41554 2017 4 28 57871 0.0207 0.4176 0.41367 2017 4 29 57872 0.0219 0.4190 0.41197 2017 4 30 57873 0.0232 0.4204 0.41042 2017 5 1 57874 0.0245 0.4217 0.40897 2017 5 2 57875 0.0257 0.4230 0.40756 2017 5 3 57876 0.0271 0.4243 0.40614 2017 5 4 57877 0.0284 0.4256 0.40467 2017 5 5 57878 0.0298 0.4269 0.40316 2017 5 6 57879 0.0311 0.4281 0.40162 2017 5 7 57880 0.0326 0.4294 0.40008 2017 5 8 57881 0.0340 0.4306 0.39858 2017 5 9 57882 0.0354 0.4317 0.39714 2017 5 10 57883 0.0369 0.4329 0.39580 2017 5 11 57884 0.0384 0.4340 0.39458 2017 5 12 57885 0.0399 0.4351 0.39346 2017 5 13 57886 0.0414 0.4362 0.39246 2017 5 14 57887 0.0429 0.4373 0.39154 2017 5 15 57888 0.0445 0.4384 0.39067 2017 5 16 57889 0.0461 0.4394 0.38981 2017 5 17 57890 0.0477 0.4404 0.38891 2017 5 18 57891 0.0493 0.4413 0.38793 2017 5 19 57892 0.0509 0.4423 0.38682 2017 5 20 57893 0.0525 0.4432 0.38557 2017 5 21 57894 0.0542 0.4441 0.38418 2017 5 22 57895 0.0559 0.4450 0.38266 2017 5 23 57896 0.0575 0.4459 0.38108 2017 5 24 57897 0.0592 0.4467 0.37952 2017 5 25 57898 0.0610 0.4475 0.37806 2017 5 26 57899 0.0627 0.4483 0.37676 2017 5 27 57900 0.0644 0.4490 0.37561 2017 5 28 57901 0.0662 0.4497 0.37460 2017 5 29 57902 0.0679 0.4504 0.37364 2017 5 30 57903 0.0697 0.4511 0.37269 2017 5 31 57904 0.0715 0.4518 0.37170 2017 6 1 57905 0.0732 0.4524 0.37067 2017 6 2 57906 0.0750 0.4530 0.36962 2017 6 3 57907 0.0768 0.4535 0.36856 2017 6 4 57908 0.0787 0.4541 0.36755 2017 6 5 57909 0.0805 0.4546 0.36660 2017 6 6 57910 0.0823 0.4551 0.36575 2017 6 7 57911 0.0841 0.4555 0.36502 2017 6 8 57912 0.0860 0.4560 0.36440 2017 6 9 57913 0.0878 0.4564 0.36390 2017 6 10 57914 0.0897 0.4567 0.36348 2017 6 11 57915 0.0915 0.4571 0.36313 2017 6 12 57916 0.0934 0.4574 0.36280 2017 6 13 57917 0.0952 0.4577 0.36245 2017 6 14 57918 0.0971 0.4580 0.36202 2017 6 15 57919 0.0990 0.4582 0.36150 2017 6 16 57920 0.1008 0.4584 0.36084 2017 6 17 57921 0.1027 0.4586 0.36005 2017 6 18 57922 0.1046 0.4587 0.35914 2017 6 19 57923 0.1064 0.4588 0.35815 2017 6 20 57924 0.1083 0.4589 0.35713 2017 6 21 57925 0.1102 0.4590 0.35615 2017 6 22 57926 0.1120 0.4590 0.35528 2017 6 23 57927 0.1139 0.4590 0.35455 2017 6 24 57928 0.1158 0.4590 0.35394 2017 6 25 57929 0.1176 0.4590 0.35340 2017 6 26 57930 0.1195 0.4589 0.35286 2017 6 27 57931 0.1213 0.4588 0.35228 2017 6 28 57932 0.1232 0.4587 0.35163 2017 6 29 57933 0.1250 0.4585 0.35093 2017 6 30 57934 0.1268 0.4583 0.35022 2017 7 1 57935 0.1287 0.4581 0.34953 2017 7 2 57936 0.1305 0.4579 0.34891 2017 7 3 57937 0.1323 0.4576 0.34837 2017 7 4 57938 0.1341 0.4573 0.34795 2017 7 5 57939 0.1359 0.4570 0.34764 2017 7 6 57940 0.1377 0.4566 0.34743 2017 7 7 57941 0.1395 0.4562 0.34732 2017 7 8 57942 0.1413 0.4558 0.34727 2017 7 9 57943 0.1430 0.4554 0.34725 2017 7 10 57944 0.1448 0.4549 0.34721 2017 7 11 57945 0.1465 0.4545 0.34711 2017 7 12 57946 0.1482 0.4540 0.34691 2017 7 13 57947 0.1499 0.4534 0.34658 2017 7 14 57948 0.1516 0.4529 0.34613 2017 7 15 57949 0.1533 0.4523 0.34556 2017 7 16 57950 0.1550 0.4516 0.34491 2017 7 17 57951 0.1567 0.4510 0.34423 2017 7 18 57952 0.1583 0.4503 0.34359 2017 7 19 57953 0.1599 0.4497 0.34303 2017 7 20 57954 0.1616 0.4489 0.34259 2017 7 21 57955 0.1632 0.4482 0.34229 2017 7 22 57956 0.1647 0.4474 0.34208 2017 7 23 57957 0.1663 0.4467 0.34190 2017 7 24 57958 0.1679 0.4458 0.34171 2017 7 25 57959 0.1694 0.4450 0.34145 2017 7 26 57960 0.1709 0.4441 0.34113 2017 7 27 57961 0.1724 0.4433 0.34078 2017 7 28 57962 0.1739 0.4424 0.34041 2017 7 29 57963 0.1753 0.4414 0.34007 2017 7 30 57964 0.1768 0.4405 0.33976 2017 7 31 57965 0.1782 0.4395 0.33951 2017 8 1 57966 0.1796 0.4385 0.33932 2017 8 2 57967 0.1810 0.4375 0.33918 2017 8 3 57968 0.1823 0.4365 0.33910 2017 8 4 57969 0.1837 0.4354 0.33906 2017 8 5 57970 0.1850 0.4344 0.33903 2017 8 6 57971 0.1863 0.4333 0.33898 2017 8 7 57972 0.1875 0.4322 0.33887 2017 8 8 57973 0.1888 0.4310 0.33868 2017 8 9 57974 0.1900 0.4299 0.33836 2017 8 10 57975 0.1912 0.4287 0.33790 2017 8 11 57976 0.1924 0.4275 0.33731 2017 8 12 57977 0.1935 0.4263 0.33661 2017 8 13 57978 0.1946 0.4251 0.33585 2017 8 14 57979 0.1957 0.4239 0.33506 2017 8 15 57980 0.1968 0.4226 0.33430 2017 8 16 57981 0.1979 0.4213 0.33358 2017 8 17 57982 0.1989 0.4200 0.33293 2017 8 18 57983 0.1999 0.4187 0.33230 2017 8 19 57984 0.2009 0.4174 0.33164 2017 8 20 57985 0.2018 0.4161 0.33091 2017 8 21 57986 0.2027 0.4147 0.33004 2017 8 22 57987 0.2036 0.4134 0.32901 2017 8 23 57988 0.2045 0.4120 0.32785 2017 8 24 57989 0.2053 0.4106 0.32660 2017 8 25 57990 0.2062 0.4092 0.32535 2017 8 26 57991 0.2069 0.4078 0.32418 2017 8 27 57992 0.2077 0.4064 0.32313 2017 8 28 57993 0.2084 0.4049 0.32222 2017 8 29 57994 0.2091 0.4035 0.32145 2017 8 30 57995 0.2098 0.4020 0.32080 2017 8 31 57996 0.2104 0.4006 0.32025 2017 9 1 57997 0.2111 0.3991 0.31976 2017 9 2 57998 0.2116 0.3976 0.31930 2017 9 3 57999 0.2122 0.3961 0.31876 2017 9 4 58000 0.2127 0.3946 0.31815 2017 9 5 58001 0.2132 0.3931 0.31745 2017 9 6 58002 0.2137 0.3916 0.31652 2017 9 7 58003 0.2141 0.3901 0.31544 2017 9 8 58004 0.2145 0.3885 0.31419 2017 9 9 58005 0.2149 0.3870 0.31291 2017 9 10 58006 0.2153 0.3854 0.31155 2017 9 11 58007 0.2156 0.3839 0.31018 2017 9 12 58008 0.2159 0.3823 0.30892 2017 9 13 58009 0.2162 0.3808 0.30776 2017 9 14 58010 0.2164 0.3792 0.30663 2017 9 15 58011 0.2166 0.3777 0.30552 2017 9 16 58012 0.2168 0.3761 0.30434 2017 9 17 58013 0.2169 0.3745 0.30299 2017 9 18 58014 0.2170 0.3729 0.30151 2017 9 19 58015 0.2171 0.3714 0.29984 2017 9 20 58016 0.2172 0.3698 0.29805 2017 9 21 58017 0.2172 0.3682 0.29622 2017 9 22 58018 0.2172 0.3666 0.29440 2017 9 23 58019 0.2172 0.3651 0.29261 2017 9 24 58020 0.2171 0.3635 0.29091 2017 9 25 58021 0.2170 0.3619 0.28937 2017 9 26 58022 0.2169 0.3603 0.28789 2017 9 27 58023 0.2167 0.3588 0.28643 2017 9 28 58024 0.2165 0.3572 0.28502 2017 9 29 58025 0.2163 0.3556 0.28360 2017 9 30 58026 0.2161 0.3541 0.28213 2017 10 1 58027 0.2158 0.3525 0.28049 2017 10 2 58028 0.2155 0.3510 0.27864 2017 10 3 58029 0.2152 0.3494 0.27663 2017 10 4 58030 0.2148 0.3479 0.27448 2017 10 5 58031 0.2144 0.3463 0.27228 2017 10 6 58032 0.2140 0.3448 0.27000 2017 10 7 58033 0.2136 0.3433 0.26773 2017 10 8 58034 0.2131 0.3418 0.26551 2017 10 9 58035 0.2126 0.3402 0.26334 2017 10 10 58036 0.2121 0.3387 0.26134 2017 10 11 58037 0.2116 0.3373 0.25951 2017 10 12 58038 0.2110 0.3358 0.25781 2017 10 13 58039 0.2104 0.3343 0.25618 2017 10 14 58040 0.2097 0.3328 0.25457 2017 10 15 58041 0.2091 0.3314 0.25291 2017 10 16 58042 0.2084 0.3299 0.25118 2017 10 17 58043 0.2077 0.3285 0.24927 2017 10 18 58044 0.2069 0.3271 0.24737 2017 10 19 58045 0.2062 0.3256 0.24542 2017 10 20 58046 0.2054 0.3242 0.24355 2017 10 21 58047 0.2046 0.3229 0.24180 2017 10 22 58048 0.2037 0.3215 0.24015 2017 10 23 58049 0.2029 0.3201 0.23866 2017 10 24 58050 0.2020 0.3188 0.23731 2017 10 25 58051 0.2011 0.3174 0.23613 2017 10 26 58052 0.2001 0.3161 0.23490 2017 10 27 58053 0.1992 0.3148 0.23368 2017 10 28 58054 0.1982 0.3135 0.23239 2017 10 29 58055 0.1972 0.3122 0.23104 2017 10 30 58056 0.1962 0.3110 0.22962 2017 10 31 58057 0.1951 0.3097 0.22802 2017 11 1 58058 0.1941 0.3085 0.22624 2017 11 2 58059 0.1930 0.3073 0.22425 2017 11 3 58060 0.1919 0.3061 0.22219 2017 11 4 58061 0.1907 0.3049 0.22020 2017 11 5 58062 0.1896 0.3037 0.21829 2017 11 6 58063 0.1884 0.3026 0.21651 2017 11 7 58064 0.1872 0.3015 0.21483 2017 11 8 58065 0.1860 0.3004 0.21339 2017 11 9 58066 0.1848 0.2993 0.21196 2017 11 10 58067 0.1835 0.2982 0.21050 2017 11 11 58068 0.1823 0.2972 0.20898 2017 11 12 58069 0.1810 0.2961 0.20732 2017 11 13 58070 0.1797 0.2951 0.20556 2017 11 14 58071 0.1784 0.2941 0.20374 2017 11 15 58072 0.1770 0.2932 0.20194 2017 11 16 58073 0.1757 0.2922 0.20019 2017 11 17 58074 0.1743 0.2913 0.19852 2017 11 18 58075 0.1729 0.2904 0.19708 2017 11 19 58076 0.1715 0.2895 0.19568 2017 11 20 58077 0.1701 0.2886 0.19451 2017 11 21 58078 0.1687 0.2878 0.19337 2017 11 22 58079 0.1673 0.2870 0.19225 2017 11 23 58080 0.1658 0.2862 0.19104 2017 11 24 58081 0.1644 0.2854 0.18977 2017 11 25 58082 0.1629 0.2847 0.18838 2017 11 26 58083 0.1614 0.2839 0.18686 2017 11 27 58084 0.1599 0.2832 0.18517 2017 11 28 58085 0.1584 0.2826 0.18336 2017 11 29 58086 0.1569 0.2819 0.18133 2017 11 30 58087 0.1554 0.2813 0.17920 2017 12 1 58088 0.1538 0.2807 0.17706 2017 12 2 58089 0.1523 0.2801 0.17508 2017 12 3 58090 0.1507 0.2795 0.17317 2017 12 4 58091 0.1492 0.2790 0.17130 2017 12 5 58092 0.1476 0.2785 0.16964 2017 12 6 58093 0.1460 0.2780 0.16791 2017 12 7 58094 0.1445 0.2775 0.16630 2017 12 8 58095 0.1429 0.2771 0.16466 2017 12 9 58096 0.1413 0.2766 0.16293 2017 12 10 58097 0.1397 0.2762 0.16115 2017 12 11 58098 0.1381 0.2759 0.15933 2017 12 12 58099 0.1365 0.2755 0.15747 2017 12 13 58100 0.1349 0.2752 0.15569 2017 12 14 58101 0.1333 0.2749 0.15406 2017 12 15 58102 0.1317 0.2747 0.15257 2017 12 16 58103 0.1301 0.2744 0.15113 2017 12 17 58104 0.1285 0.2742 0.14996 2017 12 18 58105 0.1268 0.2740 0.14880 2017 12 19 58106 0.1252 0.2738 0.14762 2017 12 20 58107 0.1236 0.2737 0.14641 2017 12 21 58108 0.1220 0.2736 0.14521 2017 12 22 58109 0.1204 0.2735 0.14398 2017 12 23 58110 0.1188 0.2734 0.14262 2017 12 24 58111 0.1172 0.2734 0.14116 2017 12 25 58112 0.1156 0.2734 0.13968 2017 12 26 58113 0.1140 0.2734 0.13813 2017 12 27 58114 0.1124 0.2734 0.13637 2017 12 28 58115 0.1108 0.2735 0.13457 2017 12 29 58116 0.1092 0.2736 0.13279 2017 12 30 58117 0.1076 0.2737 0.13106 2017 12 31 58118 0.1060 0.2738 0.12948 2018 1 1 58119 0.1044 0.2740 0.12803 2018 1 2 58120 0.1029 0.2741 0.12669 2018 1 3 58121 0.1013 0.2744 0.12535 2018 1 4 58122 0.0998 0.2746 0.12412 2018 1 5 58123 0.0982 0.2748 0.12276 2018 1 6 58124 0.0967 0.2751 0.12134 2018 1 7 58125 0.0952 0.2754 0.11983 2018 1 8 58126 0.0936 0.2758 0.11831 2018 1 9 58127 0.0921 0.2761 0.11683 2018 1 10 58128 0.0906 0.2765 0.11538 2018 1 11 58129 0.0891 0.2769 0.11410 2018 1 12 58130 0.0877 0.2773 0.11281 2018 1 13 58131 0.0862 0.2777 0.11171 2018 1 14 58132 0.0847 0.2782 0.11059 2018 1 15 58133 0.0833 0.2787 0.10951 2018 1 16 58134 0.0819 0.2792 0.10849 2018 1 17 58135 0.0804 0.2798 0.10754 2018 1 18 58136 0.0790 0.2803 0.10640 2018 1 19 58137 0.0777 0.2809 0.10538 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) 57751 -99.63 0.15 -9.04 0.06 57752 -99.37 0.15 -9.15 0.06 57753 -99.11 0.15 -9.25 0.06 57754 -98.97 0.30 -9.27 0.15 57755 -99.02 0.30 -9.22 0.15 57756 -99.13 0.30 -9.13 0.15 57757 -99.18 0.30 -9.01 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57751 0.017 0.060 -0.140 0.060 57752 0.045 0.060 -0.141 0.060 57753 0.052 0.060 -0.155 0.060 57754 0.050 0.119 -0.143 0.150 57755 0.041 0.119 -0.130 0.150 57756 0.038 0.119 -0.133 0.150 57757 0.029 0.119 -0.131 0.150 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).