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  • MPEC 2020-V41 : 2016 XP23

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    M.P.E.C. 2020-V41                              Issued 2020 November 7, 13:36 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  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
    
                                    2016 XP23                                
    
    
                                Revision to MPEC 2016-Y4                            
    
    Additional Observations:
         K16X23P  C2020 09 27.61747607 48 22.225+24 08 32.67         21.22wUEV041F51
         K16X23P  C2020 09 27.62134307 48 22.830+24 08 48.39         21.00wUEV041F51
         K16X23P  C2020 09 27.62522007 48 23.457+24 09 04.63         21.52wUEV041F51
         K16X23P  C2020 09 27.62908107 48 24.070+24 09 20.15         20.98wUEV041F51
         K16X23P  C2020 10 06.48688 08 14 05.96 +33 42 13.0          21.2 GVEV041G96
         K16X23P  C2020 10 06.49112 08 14 06.77 +33 42 28.3                VEV041G96
         K16X23P  C2020 10 06.49535 08 14 07.48 +33 42 43.6                VEV041G96
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
        Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
        Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
        R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    G96 Mt. Lemmon Survey.  Observer T. A. Pruyne.  Measurers D. Rankin, B. Gray,
        F. C. Shelly.  1.5-m reflector + 10K CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
    200927 F51    2-   27-    201006 G96    0-   19-    MPO394953   +14.3 days
    
    Orbital elements:
    2016 XP23                                           PHA, Earth MOID = 0.0256 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M  28.27950              (2000.0)            P               Q
    n   0.25509209     Peri.  319.40574     +0.91429984     +0.14383527
    a   2.4622835      Node    38.01453     +0.21723559     +0.61485776
    e   0.6451652      Incl.   37.93823     -0.34185451     +0.77541044
    P   3.86           H   19.7           G   0.15           U   1
    Residuals in seconds of arc
    161209 G96  0.0   0.3-    161211 Z84  0.4-  0.1-    161223 T12  0.1-  0.1-
    161209 G96  0.9-  0.7+    161214 H01  0.2+  0.0     161223 T12  0.0   0.0
    161209 G96  1.1-  0.2-    161214 H01  0.0   0.0     161224 T12  0.0   0.1-
    161209 G96  0.1+  0.7+    161214 H01  0.1-  0.0     161224 T12  0.0   0.0
    161209 I52  0.3-  0.1-    161214 H01  0.0   0.1-    170107 695  0.0   0.2+
    161209 I52  0.5-  0.5+    161218 I52  0.2-  0.1+    170107 695  0.2-  0.3+
    161209 I52  0.8+  0.5-    161218 I52  0.6-  0.2+    170107 695  0.3-  0.2+
    161211 I52  0.3-  0.4-    161218 I52  0.2+  0.4+    200927 F51  0.1+  0.1+
    161211 I52  0.1-  0.4-    161218 I52  0.2-  0.5-    200927 F51  0.1-  0.0
    161211 I52  0.0   0.2-    161218 291  0.9+  0.6+    200927 F51  0.0   0.3+
    161211 I52  0.2+  0.9+    161218 291 (1.6+  0.0 )   200927 F51  0.1-  0.0
    161211 926  0.1+  0.1-    161218 291  1.0+  0.6+    201006 G96  0.2-  0.6-
    161211 926  0.0   0.7+    161222 T12  0.0   0.1+    201006 G96  0.4+  1.0-
    161211 926  0.1+  0.2+    161222 T12  0.1+  0.1+    201006 G96  0.1-  1.3-
    161211 Z84  0.3-  0.3-    161222 T12  0.0   0.0
    161211 Z84  0.1+  0.0     161222 T12  0.0   0.0
    
    Ephemeris:
    2016 XP23                a,e,i = 2.46, 0.65, 38                  q = 0.8737
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 10 08    08 18 43.6 +35 13 50   0.6367  1.0529    76.6    67.4    21.2
    ...
    2020 10 23    09 07 23.6 +48 39 29   0.6948  1.1763    86.3    57.6    21.3
    ...
    2020 10 31    09 34 21.4 +54 37 48   0.7322  1.2471    91.3    52.7    21.4
    ...
    2020 11 06    09 54 30.6 +58 38 55   0.7627  1.3015    94.9    49.4    21.5
    2020 11 07    09 57 50.2 +59 17 05   0.7679  1.3107    95.5    48.8    21.5
    2020 11 08    10 01 09.0 +59 54 42   0.7732  1.3198    96.1    48.3    21.6
    ...
    2020 11 14    10 20 38.0 +63 29 58   0.8061  1.3751    99.5    45.2    21.7
    ...
    2020 11 22    10 44 56.9 +67 52 36   0.8528  1.4491   103.6    41.5    21.8
    ...
    2020 12 07    11 20 43.1 +75 05 54   0.9504  1.5874   110.2    35.6    22.1
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-V41
    


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