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  • MPEC 2023-W134 : 2021 OD

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    M.P.E.C. 2023-W134                            Issued 2023 November 27, 14:10 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 OD                                 
    
    
                               Revision to MPEC 2021-O21                            
    
    Additional Observations:
         K21O00D 0C2023 11 11.60142708 39 35.654-13 57 56.92         23.24GVEW134T12
         K21O00D 0C2023 11 11.61334908 39 36.466-13 57 58.04         23.24GVEW134T12
         K21O00D 0C2023 11 12.58392308 40 45.284-13 59 19.69         22.83GVEW134T12
         K21O00D 0C2023 11 12.62934108 40 48.314-13 59 23.37         22.79GVEW134T12
    
    Observer details:
    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, reference and Delta-T
    231111 T12  9.9+  8.1+    231112 T12 10.0+  8.1+    E2021-X46   +0.00 days
    
    Orbital elements:
    2021 OD                                                  Earth MOID = 0.2722 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M  55.37829              (2000.0)            P               Q                  
    n   0.56600223     Peri.  212.30574     +0.88833372     +0.20891534             
    a   1.4474068      Node   129.73033     -0.21790850     +0.97564713             
    e   0.1248111      Incl.   32.12149     -0.40420179     -0.06683607             
    P   1.74           H   20.20          G   0.15           U   1                  
    Residuals in seconds of arc
    210714 F51  0.0   0.2+    210720 B67  0.1-  0.2+    210809 T08  0.4+  0.3+
    210714 F51  0.1-  0.2+    210720 B67  0.1+  0.0     210809 T08  0.2+  0.6-
    210717 T08  0.0   0.3+    210720 A17  0.1-  0.5+    210813 Y00  0.2-  0.6-
    210717 T08  0.1-  0.4+    210720 A17  0.6+  0.2-    210813 Y00  0.2-  0.3+
    210717 T08 (0.4-  1.2+)   210720 A17  0.3-  0.4+    210813 Y00  0.8+  0.1+
    210717 T08  0.2+  0.4+    210728 807  0.1-  0.4-    210827 807  0.1-  0.0
    210717 F51  0.1+  0.2+    210728 807  0.2-  0.0     210827 807  0.1+  0.2-
    210717 F51  0.1+  0.2+    210728 807  0.1-  0.4-    210827 807  0.0   0.1-
    210718 247  0.5-  0.2+    210729 807  0.1+  0.4-    210910 807  0.1-  0.2+
    210718 J95  0.3+  0.3-    210729 807  0.1-  0.1-    210910 807  0.4-  0.2+
    210718 247  0.1-  0.6-    210729 807  0.1+  0.0     210910 807  0.0   0.3+
    210718 J95  0.1+  0.3+    210730 807  0.5+  0.0     211009 474  0.0   0.3-
    210718 247  0.6-  0.6-    210730 807  0.2-  0.0     211009 474  0.1-  0.5+
    210718 J95  0.4+  0.1-    210730 807  0.2-  0.1-    211009 474  0.2+  0.3+
    210718 L81  0.0   0.5-    210805 T08  0.4+  0.1+    211009 474  0.0   0.1-
    210718 L81  0.3+  0.2-    210805 T08  0.3-  0.4+    211202 807  0.2-  0.0
    210718 Y00  0.4+  0.1+    210805 T08  0.5+  0.5+    211202 807  0.3+  0.1-
    210718 Y00  0.1-  0.3+    210805 T08  0.5-  0.3+    211202 807  0.2+  0.1-
    210718 Y00  0.6-  0.3+    210808 W94  0.4+  0.0     231111 T12  0.0   0.0
    210718 587  0.0   0.3-    210808 W94  0.5+  0.0     231111 T12  0.0   0.0
    210718 587  0.1-  0.2+    210808 W94  0.1+  0.6+    231112 T12  0.0   0.0
    210718 587  0.0   0.2+    210809 T08  0.2-  0.1-    231112 T12  0.1+  0.0
    210720 B67  0.4-  0.2+    210809 T08  0.5-  0.4+
    
    Ephemeris:
    2021 OD                  a,e,i = 1.45, 0.12, 32                  q = 1.2668
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 10 28    08 19 21.4 -13 16 52   1.1505  1.4411    84.1    43.3    23.0
    ...
    2023 11 12    08 40 03.8 -13 58 27   1.0514  1.4677    91.9    42.4    22.8
    ...
    2023 11 20    08 48 34.5 -14 01 58   0.9924  1.4815    96.8    41.5    22.7
    ...
    2023 11 26    08 53 36.9 -13 52 09   0.9460  1.4917   101.0    40.5    22.5
    2023 11 27    08 54 20.0 -13 49 17   0.9381  1.4934   101.7    40.3    22.5
    2023 11 28    08 55 01.0 -13 46 01   0.9302  1.4950   102.5    40.1    22.5
    ...
    2023 12 04    08 58 18.4 -13 17 28   0.8824  1.5049   107.2    38.7    22.4
    ...
    2023 12 12    09 00 19.8 -12 10 29   0.8184  1.5177   114.3    36.2    22.1
    ...
    2023 12 27    08 55 38.2 -08 00 23   0.7063  1.5403   130.7    28.9    21.7
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-W134
    


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