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  • MPEC 2020-X175 : 2016 XF18

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    M.P.E.C. 2020-X175                            Issued 2020 December 14, 19:55 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 XF18                                
    
    
                               Revision to MPEC 2016-X82                            
    
    Additional Observations:
         K16X18F |C2020 12 13.27385 09 00 49.72 -22 19 37.3          22.4 GVEX175807
         K16X18F |C2020 12 13.28016 09 00 50.26 -22 20 37.0          22.4 GVEX175807
         K16X18F |C2020 12 13.28619 09 00 50.86 -22 21 34.6          22.2 GVEX175807
         K16X18F |C2020 12 14.26336 09 02 43.36 -24 53 40.8          22.0 GVEX175807
         K16X18F |C2020 12 14.26829 09 02 43.82 -24 54 26.7          22.1 GVEX175807
         K16X18F |C2020 12 14.27322 09 02 44.26 -24 55 12.5          22.1 GVEX175807
    
    Observer details:
    807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes.
        1.00-m f/10.0 astrograph + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    201213 807 48.9-  2.3-    201214 807 49.1-  0.6-    MPO411583   -0.00 days
    
    Orbital elements:
    2016 XF18                                                Earth MOID = 0.0928 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 325.88309              (2000.0)            P               Q
    n   0.74478639     Peri.  247.72956     -0.72183322     -0.61673879
    a   1.2053548      Node   252.71206     +0.69132874     -0.66353018
    e   0.1845172      Incl.   19.19879     -0.03195894     -0.42351030
    P   1.32           H   24.1           G   0.15           U   0
    Residuals in seconds of arc
    161206 G96  0.4-  0.3+    161206 K51  0.1-  0.1+    161208 I52  0.0   0.2+
    161206 G96  0.3-  0.1+    161206 K51  0.1-  0.0     161208 I52  0.2-  0.1-
    161206 G96  0.1+  0.4+    161206 033  0.2+  0.5+    161208 I52  0.1-  0.1+
    161206 G96  0.5+  0.5+    161206 033  0.0   0.2+    161215 705  0.0   0.2+
    161206 I52  0.1-  0.4+    161206 033  0.6+  0.2+    161215 705  0.4+  0.9+
    161206 I52  0.3-  0.0     161206 033  0.3+  0.3-    161215 705  0.5+  1.6+
    161206 I52  0.4-  0.1-    161206 033  0.1+  0.2+    161221 807  0.0   0.0
    161206 I52  0.0   0.1-    161206 033  0.1+  0.4+    161221 807  0.7+  0.8-
    161206 G96  0.1-  0.8-    161206 033  0.5+  0.3+    161221 807  0.1-  0.1-
    161206 G96  0.5-  0.3-    161206 033  0.1-  0.4-    161228 807  0.0   0.1-
    161206 G96  0.3+  0.3-    161206 033  0.2-  0.4-    161228 807  0.1+  0.3-
    161206 G96  1.3-  0.3-    161206 033  0.0   0.0     161228 807  0.4+  0.2-
    161206 I52  0.8-  0.1-    161207 G96  1.0+  0.6+    170528 T12  0.0   0.0
    161206 I52  0.4+  0.3+    161207 G96  0.5+  1.7-    170528 T12  0.0   0.0
    161206 I52  0.0   0.3-    161207 G96  1.4-  2.0-    201213 807  0.2+  0.1-
    161206 033  0.2+  0.1+    161207 H21  0.4+  0.4-    201213 807  0.6-  0.0
    161206 033  0.3+  0.5+    161207 H21  0.4+  0.0     201213 807  0.1-  0.4-
    161206 033  0.0   0.2+    161207 H21  0.4+  0.2-    201214 807  0.3+  0.2+
    161206 033  0.2-  0.2+    161207 I52  0.1-  1.4+    201214 807  0.2+  0.2+
    161206 033  0.3+  0.3+    161207 I52  0.9-  0.7-    201214 807  0.0   0.2+
    161206 K51  0.1-  0.3+    161207 I52  0.4-  1.2-
    
    Ephemeris:
    2016 XF18                a,e,i = 1.21, 0.18, 19                  q = 0.9829
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 11 14    07 51 47.8 +38 09 44   0.2440  1.1240   117.8    51.2    23.2
    ...
    2020 11 29    08 30 48.2 +14 27 32   0.1694  1.0820   120.4    51.8    22.3
    ...
    2020 12 07    08 48 18.8 -05 24 28   0.1510  1.0613   116.5    56.2    22.2
    ...
    2020 12 13    09 00 16.5 -21 36 30   0.1508  1.0467   110.4    61.8    22.3
    2020 12 14    09 02 11.4 -24 13 00   0.1519  1.0444   109.3    62.8    22.3
    2020 12 15    09 04 05.3 -26 46 13   0.1533  1.0421   108.1    63.9    22.4
    ...
    2020 12 21    09 15 14.9 -40 34 52   0.1670  1.0291   101.1    69.7    22.7
    ...
    2020 12 29    09 30 20.3 -54 30 09   0.1951  1.0138    93.4    75.5    23.2
    ...
    2021 01 13    10 04 54.6 -70 22 23   0.2578  0.9928    84.6    80.5    24.0
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-X175
    


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