Federal Agency
  on Technical Regulating
  and Metrology

  FSUE "VNIIFTRI"



                                 B U L L E T I N E    A - 2609

                                            5 January 2026


            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.  23      61032      +0,077552    +0,11135    +0,32112 
        24      61033      +0,077594    +0,11027    +0,32194 
        25      61034      +0,077371    +0,10916    +0,32258 
        26      61035      +0,076901    +0,10837    +0,32329 
        27      61036      +0,076264    +0,10798    +0,32404 
        28      61037      +0,075577    +0,10812    +0,32499 
        29      61038      +0,074961    +0,10902    +0,32621 

                          P R E D I C T I O N
  YEAR  2026
  Jan.   5      61045      +0,07515     +0,1135     +0,3336   
        12      61052      +0,07302     +0,1094     +0,3409   
        19      61059      +0,07617     +0,1077     +0,3472   
        26      61066      +0,07331     +0,1066     +0,3540   
  Feb.   2      61073      +0,07251     +0,1058     +0,3632   
         9      61080      +0,06846     +0,1037     +0,3729   
        16      61087      +0,06996     +0,0992     +0,3845   

     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