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  • MPEC 2024-A166 : 2013 AK20

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    M.P.E.C. 2024-A166                             Issued 2024 January 15, 14:11 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
    
                                    2013 AK20                                
    
    
                               Revision to MPEC 2013-A31                            
    
    Additional Observations:
         K13A20K  C2023 12 10.62844509 44 22.551-06 21 09.59         21.70GVEA166F52
         K13A20K  C2023 12 10.63887909 44 23.614-06 20 42.97         22.73GVEA166F52
         K13A20K  C2023 12 14.64654509 51 40.641-03 23 02.60         21.42GVEA166F52
         K13A20K  C2023 12 14.64719809 51 40.674-03 23 00.63         22.53GVEA166F52
         K13A20K  C2023 12 23.59813310 05 26.873+04 24 21.35         21.89GVEA166F52
         K13A20K  C2024 01 12.98475 10 18 46.49 +26 49 20.7          21.2 rVEA166O18
         K13A20K  C2024 01 12.99122 10 18 46.37 +26 49 46.6          22.4 rVEA166O18
         K13A20K  C2024 01 12.99770 10 18 46.27 +26 50 12.9          21.2 rVEA166O18
    
    Observer details:
    F52 Pan-STARRS 2, Haleakala.  Observers J. Herman, T. Lowe, P. Minguez, A.
        Schultz, I. Smith.  Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
        Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
        Weryk.  1.8-m Ritchey-Chretien + CCD.
    O18 WFST, Lenghu.  Observers Z. Lou, Z. Q. Li, S. X. Li, Q. Y. Hai.  Measurers
        B. Li, H. B. Zhao, Z. J. Xu, G. T. Zhaori.  2.5-m f/2.48 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    231210 F52 0.29- 0.21-    240112 O18 0.43- 0.09-    MPO750185   -0.12 days
    
    Orbital elements:
    2013 AK20                                                Earth MOID = 0.1550 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 334.05538              (2000.0)            P               Q                  
    n   0.62880291     Peri.  296.90929     +0.66127863     -0.69165702             
    a   1.3493554      Node   108.51097     +0.74964045     +0.59518677             
    e   0.2231579      Incl.   17.83183     +0.02738186     +0.40910057             
    P   1.57           H   23.16          G   0.15           U   1                  
    Residuals in seconds of arc
    121223 F51  0.2+  0.2+    130105 104  0.4+  0.0     130114 J04  0.1+  0.2-
    121223 F51  0.2+  0.1-    130106 204  0.0   0.2+    130114 J04  0.2+  0.1-
    130105 G96  1.4-  0.2+    130106 204  0.8-  0.1-    130120 291  0.1+  0.0
    130105 G96  0.5-  0.3-    130106 H01  0.0   0.0     130120 291  0.1+  0.1+
    130105 G96  0.2+  0.3-    130106 H01  0.1-  0.1-    130120 291  0.0   0.1+
    130105 G96  0.4-  0.1+    130106 H01  0.1+  0.2+    231210 F52  0.1-  0.3-
    130105 H01  0.1+  0.0     130106 H01  0.0   0.1+    231210 F52  0.2-  0.0
    130105 H01  0.0   0.1+    130107 B74  0.4-  0.7+    231214 F52  0.4+  0.1-
    130105 H01  0.2+  0.2-    130107 B74  0.4+  0.0     231214 F52  0.0   0.0
    130105 H01  0.2+  0.1-    130107 B74  0.4+  0.7-    231223 F52  0.1+  0.1-
    130105 H21  0.1+  0.8+    130107 291  0.0   0.9+    240112 O18  0.2+  0.1+
    130105 H21  0.2-  0.2-    130107 291  0.1+  0.1+    240112 O18  0.0   0.2-
    130105 104  1.2+  0.8-    130107 291  0.4+  0.4-    240112 O18  0.0   0.2-
    130105 104  0.6+  0.6-    130114 J04  0.0   0.2-
    
    Ephemeris:
    2013 AK20                a,e,i = 1.35, 0.22, 18                  q = 1.0482
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 12 16    09 53 59.8 -02 18 33   0.2935  1.1244   111.2    54.7    22.7
    ...
    2023 12 31    10 13 38.7 +12 01 20   0.2688  1.1672   127.7    41.8    22.3
    ...
    2024 01 08    10 18 23.1 +21 04 42   0.2661  1.1921   137.1    34.2    22.1
    ...
    2024 01 14    10 18 37.6 +27 58 34   0.2706  1.2115   143.4    29.0    22.0
    2024 01 15    10 18 22.5 +29 05 58   0.2719  1.2148   144.3    28.2    22.0
    2024 01 16    10 18 02.4 +30 12 35   0.2735  1.2181   145.1    27.5    22.0
    ...
    2024 01 22    10 14 18.7 +36 29 19   0.2864  1.2380   148.8    24.3    22.0
    ...
    2024 01 30    10 05 13.2 +43 26 07   0.3131  1.2649   149.6    23.2    22.2
    ...
    2024 02 14    09 41 36.7 +51 09 29   0.3881  1.3157   142.2    27.4    22.9
    
    A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-A166
    


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