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  • MPEC 2023-Y65 : 2021 UP

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    M.P.E.C. 2023-Y65                             Issued 2023 December 20, 14:09 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
    
                                     2021 UP                                 
    
    
                               Revision to MPEC 2021-U55                            
    
    Additional Observations:
         K21U00P &C2023 10 13.35691707 25 10.470+28 18 33.84         24.7 GVEY065309
         K21U00P &C2023 10 13.36224807 25 10.739+28 18 42.91         25.3 GVEY065309
         K21U00P 0C2023 12 10.59103106 17 49.930+47 19 17.33         25.80GVEY065T12
    
    Observer details:
    309 Cerro Paranal.  Observers O. Hainaut, M. Micheli, L. Conversi.  Measurers
        M. Micheli, O. Hainaut.  8.2-m VLT UT1 + CCD.
    T12 University of Hawaii 88-inch telescope, Maunakea.  Observer D. J. Tholen.
        2.24-m f/10.1 reflector + 2112 x 2112 pixels STA1600 10k CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    231013 309 0.02+ 0.01+    231210 T12 0.12+ 0.02+    E2021-Y53   +0.07 days
    
    Orbital elements:
    2021 UP                                                  Earth MOID = 0.0017 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M   6.53827              (2000.0)            P               Q                  
    n   0.50407034     Peri.  320.93744     +0.96416928     +0.25803547             
    a   1.5636586      Node    24.32229     -0.19002122     +0.83378618             
    e   0.4016624      Incl.    8.60239     -0.18512032     +0.48807612             
    P   1.96           H   25.61          G   0.15           U   1                  
    Residuals in seconds of arc
    211019 T08  0.1+  0.5-    211021 J95  0.1-  0.1-    211103 291  0.3+  0.4+
    211019 T08  0.8-  0.3-    211021 J95  0.2+  0.3-    211103 291  0.0   0.2+
    211019 T08  0.3+  0.1-    211021 J95  0.2-  0.1+    211104 291  0.1+  0.1-
    211019 T08  0.5-  0.5+    211021 G02  0.6+  0.5-    211104 291  0.1+  0.0
    211019 T08  0.9+  0.3+    211021 G02  0.0   0.1+    211104 291  0.1-  0.0
    211019 104  0.6+  0.2-    211021 G02  0.5+  0.4-    211105 291  0.1+  0.0
    211019 104  0.1-  0.0     211021 Z99  0.2+  0.0     211105 291  0.0   0.0
    211019 104  0.3+  0.5+    211021 Z99  0.3+  0.0     211105 291  0.4-  0.2-
    211019 L01  0.2+  0.1-    211021 Z99  0.2-  0.1-    211107 291  0.1+  0.1-
    211019 104  0.1-  0.5+    211027 291  0.1-  0.4+    211107 291  0.1-  0.1-
    211019 L01  0.2+  0.2-    211027 291  0.2+  0.0     211107 291  0.4-  0.2-
    211019 L01  0.0   0.1+    211027 291  0.0   0.3-    211111 T12  0.1+  0.1+
    211019 L01  0.9-  0.4-    211028 291  0.1+  0.0     211111 T12  0.0   0.1+
    211019 L01  0.7-  0.1+    211028 291  0.1+  0.0     211111 T12  0.1+  0.2+
    211019 L01  1.0-  0.3+    211028 291  0.2+  0.0     211126 G37  0.1-  0.0
    211019 204  0.2-  0.1-    211030 291  0.1-  0.0     231013 309  0.0   0.0
    211019 204  0.1+  0.1+    211030 291  0.4+  0.5-    231013 309  0.0   0.0
    211020 204  0.2-  0.3-    211030 291  0.4-  0.1-    231210 T12  0.1-  0.1+
    211020 204  0.1+  0.1+    211103 291  0.0   0.3-
    
    Ephemeris:
    2021 UP                  a,e,i = 1.56, 0.40, 9                   q = 0.9356
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 11 20    07 14 58.0 +43 20 19   0.3739  1.2585   129.2    37.5    25.5
    ...
    2023 12 05    06 35 24.3 +46 51 20   0.4121  1.3488   146.6    23.7    25.5
    ...
    2023 12 13    06 10 21.1 +47 21 54   0.4446  1.3968   153.6    18.3    25.5
    ...
    2023 12 19    05 52 42.9 +47 06 23   0.4759  1.4324   156.2    16.1    25.6
    2023 12 20    05 49 59.6 +47 01 02   0.4817  1.4383   156.4    15.9    25.7
    2023 12 21    05 47 20.8 +46 55 00   0.4877  1.4441   156.5    15.8    25.7
    ...
    2023 12 27    05 33 15.0 +46 06 37   0.5273  1.4791   155.4    16.1    25.9
    ...
    2024 01 04    05 19 37.8 +44 40 32   0.5896  1.5249   150.7    18.4    26.3
    ...
    2024 01 19    05 09 17.8 +41 42 53   0.7339  1.6076   138.3    24.0    27.1
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-Y65
    


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