Federal Agency
  on Technical Regulating
  and Metrology

  FSUE "VNIIFTRI"



                                 B U L L E T I N E    A - 2608

                                           29 December 2025


            UNIVERSAL TIME AND TERRESTRIAL POLE MOTION


    Data         MJD      UT1(SU)-UTC    X(SU)      Y(SU)
    (0h UT)                   (s)         (")        (")

                       W E E K L Y    V A L U E S
  YEAR  2025
  Dec.  16      61025      +0,074824    +0,11890    +0,31792 
        17      61026      +0,074922    +0,11768    +0,31811 
        18      61027      +0,075215    +0,11644    +0,31819 
        19      61028      +0,075665    +0,11507    +0,31842 
        20      61029      +0,076220    +0,11382    +0,31882 
        21      61030      +0,076781    +0,11280    +0,31945 
        22      61031      +0,077275    +0,11220    +0,32026 

                          P R E D I C T I O N
  YEAR  2025/26
  Dec.  29      61038      +0,07544     +0,1067     +0,3255   
  Jan.   5      61045      +0,07628     +0,1033     +0,3301   
        12      61052      +0,07369     +0,1004     +0,3353   
        19      61059      +0,07489     +0,0975     +0,3432   
        26      61066      +0,07126     +0,0931     +0,3518   
  Feb.   2      61073      +0,07169     +0,0862     +0,3625   
         9      61080      +0,06834     +0,0833     +0,3725   

     NOTATION:
MJD - Modifired Julian Day; MJD=JD-2400000,5;
UT1(SU), X(SU), Y(SU) - Universal Time UT1 and terrestrial pole motion
                        components, evaluated State Service for Time,
                        Frequency and EOP evaluation - SSTF;
UTC -  Universal Time Coordinated;
TA(SU) - Atomic Time scale of Russian Federation;
Difference UTC-TA(SU) = -33,17276 s (from 1 July 2015),
                        -34,17276 s (from 1 January 2017).


                                 Main Metrological Center
                                       of SSTF