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  • MPEC 2023-X284 : 2020 XJ15

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    M.P.E.C. 2023-X284                            Issued 2023 December 14, 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
    
                                    2020 XJ15                                
    
    
                               Revision to MPEC 2021-F120                           
    
    Additional Observations:
         K20X15J  C2023 11 11.54325707 44 04.533+29 09 45.90         23.02GVEX284F52
         K20X15J  C2023 11 11.55683007 44 06.264+29 09 45.09         23.10GVEX284F52
         K20X15J  C2023 12 09.54130608 42 57.053+28 00 08.56         22.01GVEX284F52
         K20X15J  C2023 12 09.55266608 42 58.336+28 00 05.98         21.86GVEX284F52
         K20X15J  C2023 12 09.56429908 42 59.653+28 00 03.38         22.06GVEX284F52
         K20X15J KC2023 12 11.38314908 46 37.47 +27 52 52.3          21.8 GVEX284H21
         K20X15J KC2023 12 11.39037008 46 38.29 +27 52 50.6          22.0 GVEX284H21
         K20X15J KC2023 12 11.39816908 46 39.16 +27 52 48.7          22.0 GVEX284H21
         K20X15J KC2023 12 13.50401708 50 49.370+27 44 10.48         21.68GVEX284F52
    
    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.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers T. Linder, R. Holmes, L. Horn.  1.3-m f/4.0 astrograph + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    231111 F52 0.02- 0.01-    231213 F52 0.04- 0.01-    MPO782727   +0.00 days
    
    Orbital elements:
    2020 XJ15                                                Earth MOID = 0.2057 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 304.83791              (2000.0)            P               Q                  
    n   0.33303652     Peri.  182.68097     -0.91475291     -0.40257344             
    a   2.0613013      Node   333.49834     +0.37208207     -0.80657865             
    e   0.4192175      Incl.    4.38074     +0.15742315     -0.43285737             
    P   2.96           H   21.42          G   0.15           U   0                  
    Residuals in seconds of arc
    201212 V00  0.1+  0.4-    210211 G96  0.1-  0.0     210407 G96  0.0   0.1+
    201212 V00  0.1+  0.2-    210211 G96  0.1+  0.1-    210407 G96  0.1-  0.1-
    201212 V00  0.1+  0.1+    210211 G96  0.0   0.1+    210407 G96  0.1+  0.1-
    201212 V00  0.0   0.0     210211 I52  0.1-  0.1-    210511 F51  0.1+  0.3-
    201218 G96  0.4+  0.2-    210211 I52  0.2+  0.0     210511 F51  0.0   0.1+
    201218 G96  0.5+  0.8+    210212 I52  0.1+  0.1-    231111 F52  0.1-  0.2-
    201218 G96  0.6-  0.1+    210212 I52  0.0   0.0     231111 F52  0.2+  0.0
    201218 G96  0.5-  0.5+    210303 I52  0.1+  0.0     231209 F52  0.0   0.1+
    210104 G96  0.1+  0.2+    210303 I52  0.1+  0.2-    231209 F52  0.1-  0.0
    210104 G96  0.0   0.2+    210303 I52  0.0   0.0     231209 F52  0.1-  0.0
    210104 G96  0.2-  0.0     210318 G96  0.1-  0.3-    231211 H21  0.1+  0.0
    210104 G96  0.1-  0.3+    210318 G96  0.0   0.1-    231211 H21  0.1+  0.1+
    210106 G96  0.1-  0.0     210318 G96  0.1+  0.0     231211 H21  0.0   0.1+
    210106 G96  0.2-  0.1+    210318 G96  0.0   0.2+    231213 F52  0.1-  0.1+
    210106 G96  0.1-  0.1-    210407 G96  0.4-  0.8+
    
    Ephemeris:
    2020 XJ15                a,e,i = 2.06, 0.42, 4                   q = 1.1972
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 11 14    07 49 23.6 +29 06 15   0.8303  1.5525   116.8    34.7    23.4
    ...
    2023 11 29    08 21 19.3 +28 34 28   0.6680  1.4733   124.7    33.4    22.8
    ...
    2023 12 07    08 37 49.0 +28 09 25   0.5907  1.4328   129.0    32.3    22.4
    ...
    2023 12 13    08 49 49.3 +27 46 17   0.5371  1.4036   132.3    31.2    22.1
    2023 12 14    08 51 47.2 +27 42 01   0.5286  1.3988   132.9    31.1    22.1
    2023 12 15    08 53 44.4 +27 37 38   0.5202  1.3941   133.4    30.9    22.0
    ...
    2023 12 21    09 05 13.3 +27 08 14   0.4719  1.3664   136.8    29.6    21.8
    ...
    2023 12 29    09 19 50.0 +26 19 13   0.4138  1.3317   141.3    27.5    21.4
    ...
    2024 01 13    09 44 22.0 +24 04 06   0.3241  1.2749   150.1    22.6    20.6
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-X284
    


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