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  • MPEC 2022-X98 : 2020 RU4

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    M.P.E.C. 2022-X98                             Issued 2022 December 15, 14:06 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets, routine data on comets and natural satellites,
             and occasional editorial announcements.  They are published
        on behalf of Division F of the International Astronomical Union by the
              Minor Planet Center, Smithsonian Astrophysical Observatory,
                              Cambridge, MA 02138, U.S.A.
    			  
                 Prepared using the Tamkin Foundation Computer Network
    
                                  MPC@CFA.HARVARD.EDU
                URL https://www.minorplanetcenter.net/    ISSN 1523-6714
    
                                    2020 RU4                                 
    
    
                               Revision to MPEC 2020-R147                           
    
    Additional Observations:
         K20R04U  C2020 09 07.26308420 21 00.370-18 57 51.14         20.60GVEX098F51
         K20R04U  C2020 09 14.34719721 08 33.025-22 10 55.87         20.88GVEX098F51
         K20R04U  C2020 09 17.30313621 24 50.684-22 54 12.54         21.46GVEX098F51
         K20R04U  C2020 09 17.31669621 24 54.662-22 54 22.33         21.37GVEX098F51
         K20R04U  C2020 09 17.33024921 24 58.626-22 54 32.08         21.08GVEX098F51
         K20R04U  C2022 08 27.50906302 10 00.849+10 46 38.68         21.99GVEX098F52
         K20R04U  C2022 08 27.52009602 10 00.926+10 46 11.94         21.86GVEX098F52
         K20R04U  C2022 08 27.53111502 10 00.978+10 45 45.78         21.73GVEX098F52
         K20R04U KC2022 09 04.60158302 10 13.493+05 28 45.09         21.95GVEX098F52
         K20R04U  C2022 09 05.57035602 09 55.767+04 52 05.02         22.34wUEX098F52
         K20R04U  C2022 09 05.58267402 09 55.326+04 51 37.64         22.14wUEX098F52
         K20R04U  C2022 09 05.59501602 09 54.901+04 51 09.34         21.90wUEX098F52
         K20R04U  C2022 09 19.46076101 59 11.451-03 03 43.81         21.98GVEX098F52
         K20R04U  C2022 09 19.47298601 59 10.445-03 04 06.12         22.40GVEX098F52
         K20R04U  C2022 09 19.49752001 59 08.490-03 04 50.17         22.08GVEX098F52
         K20R04U  C2022 09 23.46286601 54 20.908-04 58 09.65         22.20GVEX098F52
         K20R04U  C2022 09 23.47501701 54 19.853-04 58 29.39         22.37GVEX098F52
         K20R04U  C2022 09 23.48714801 54 18.760-04 58 49.31         22.58GVEX098F52
         K20R04U  C2022 09 23.49932301 54 17.669-04 59 08.73         23.00GVEX098F52
         K20R04U  C2022 09 28.47742801 47 40.726-07 03 03.81         21.97GVEX098F51
         K20R04U  C2022 09 28.48848901 47 39.673-07 03 18.87         22.28GVEX098F51
         K20R04U  C2022 09 28.49954101 47 38.644-07 03 33.90         22.57GVEX098F51
         K20R04U  C2022 10 17.37658901 23 23.958-11 29 52.48         22.64GVEX098F52
         K20R04U  C2022 10 17.39939601 23 22.335-11 30 00.42         22.52GVEX098F52
         K20R04U  C2022 10 17.41085201 23 21.516-11 30 04.94         21.96GVEX098F52
         K20R04U  C2022 10 24.40727201 16 53.139-11 53 57.70         22.65GVEX098F51
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
        Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
        Lowe, A. Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber,
        Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, H. Gao,
        C.-C. Lin, E. Magnier.  1.8-m Ritchey-Chretien + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    200907 F51 0.00+ 0.00+    221024 F51 1.01+ 0.34+    MPO704341   -0.54 days
    
    Orbital elements:
    2020 RU4                                                 Earth MOID = 0.0648 AU
    Epoch 2023 Feb. 25.0 TT = JDT 2460000.5                 Veres                   
    M 116.38362              (2000.0)            P               Q                  
    n   0.50353839     Peri.  131.81351     +0.38027029     +0.92367555             
    a   1.5647597      Node   160.38372     -0.88470663     +0.37812652             
    e   0.3459033      Incl.    8.06420     -0.26960840     +0.06199858             
    P   1.96           H   23.48          G   0.15           U   0                  
    Residuals in seconds of arc
    200813 G96  0.2-  0.4-    200913 L01  1.3-  0.3+    220905 F52  0.1+  0.2-
    200813 G96  0.1-  0.6+    200913 L01 (2.2-  0.3+)   220905 F52  0.1+  0.3+
    200813 G96  0.6+  0.0     200914 F52  0.2-  0.1-    220905 F52  0.3+  0.1-
    200907 F51  0.1+  0.1-    200914 F51  0.1-  0.0     220919 F52  0.0   0.1-
    200912 F52  0.1+  0.1-    200914 F52  0.2+  0.0     220919 F52  0.3-  0.3-
    200912 F52  0.0   0.1-    200914 F52  0.4+  0.0     220919 F52  0.2+  0.0
    200912 F52  0.1+  0.1-    200917 F51  0.2-  0.0     220923 F52  0.1-  0.0
    200912 F52  0.1-  0.0     200917 F51  0.1+  0.0     220923 F52  0.2+  0.0
    200913 F52  0.2+  0.3+    200917 F51  0.3+  0.1-    220923 F52  0.0   0.3-
    200913 F52  0.1-  0.1+    200918 V06  1.0+  0.3+    220923 F52  0.1-  0.1+
    200913 F52  0.0   0.1+    200918 V06  0.2-  0.1+    220928 F51  0.0   0.1+
    200913 568  0.0   0.0     200918 V06  0.1-  0.0     220928 F51  0.2-  0.1+
    200913 568  0.0   0.0     200918 V06  0.1-  0.4+    220928 F51  0.0   0.1+
    200913 568  0.1-  0.0     220827 F52  0.0   0.1+    221017 F52  0.3-  0.2-
    200913 568  0.0   0.1-    220827 F52  0.1+  0.2-    221017 F52  0.1+  0.1+
    200913 568  0.0   0.0     220827 F52  0.1-  0.1+    221017 F52  0.3+  0.2-
    200913 L01  0.5-  0.1+    220904 F52  0.2+  0.3+    221024 F51  0.3-  0.2+
    
    Ephemeris:
    2020 RU4                 a,e,i = 1.56, 0.35, 8                   q = 1.0235
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2022 11 15    01 09 59.6 -10 18 26   0.6327  1.5153   137.1    26.4    24.6
    ...
    2022 11 30    01 15 32.7 -07 47 40   0.7957  1.5872   125.6    30.4    25.3
    ...
    2022 12 08    01 21 11.5 -06 13 49   0.8911  1.6242   119.8    31.7    25.6
    ...
    2022 12 14    01 26 24.2 -05 00 10   0.9660  1.6512   115.7    32.5    25.9
    2022 12 15    01 27 20.7 -04 47 42   0.9787  1.6556   115.0    32.6    25.9
    2022 12 16    01 28 18.3 -04 35 11   0.9915  1.6600   114.3    32.7    25.9
    ...
    2022 12 22    01 34 27.6 -03 19 24   1.0697  1.6862   110.3    33.2    26.2
    ...
    2022 12 30    01 43 37.1 -01 37 12   1.1771  1.7200   105.2    33.5    26.4
    ...
    2023 01 14    02 03 10.5 +01 33 17   1.3856  1.7799    95.9    33.3    26.8
    
    A. U. Tomatic                (C) Copyright 2022 MPC           M.P.E.C. 2022-X98
    


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