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  • MPEC 2020-T07 : 2018 RP8

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    M.P.E.C. 2020-T07                               Issued 2020 October 4, 23:11 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
    
                                    2018 RP8                                 
    
    
                               Revision to MPEC 2018-S25                            
    
    Additional Observations:
         K18R08P  C2011 11 12.22076320 48 11.362+05 49 42.42         21.76GVET007F51
         K18R08P  C2011 11 12.23167720 48 13.187+05 49 45.90         21.09GVET007F51
         K18R08P  C2016 10 17.47657801 11 42.963+73 48 26.53         20.15GVET007F51
         K18R08P  C2016 10 17.48954901 11 30.760+73 48 25.97         20.08GVET007F51
         K18R08P KC2020 10 04.09123716 51 04.27 -13 04 19.8                VET007I52
         K18R08P KC2020 10 04.09480216 51 06.01 -13 04 15.3                VET007I52
         K18R08P KC2020 10 04.09797316 51 07.51 -13 04 14.0                VET007I52
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
        Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  Measurers
        E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
        H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D.
        Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m reflector +
        CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    111112 F51  0.9-  2.1-    201004 I52  1.5-  1.0-    MPO529362    -253 days
    
    Orbital elements:
    2018 RP8                                                 Earth MOID = 0.1330 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 180.85848              (2000.0)            P               Q
    n   1.41749825     Peri.  247.64699     -0.85432354     +0.49256088
    a   0.7848519      Node   321.30258     -0.32275784     -0.75294289
    e   0.5153478      Incl.   15.38565     -0.40738025     -0.43641813
    P   0.70           H   19.7           G   0.15           U   3
    Residuals in seconds of arc
    111112 F51  0.1+  0.0     180916 033  0.0   0.1+    180924 C51  0.8-  1.7+
    111112 F51  0.1+  0.2-    180917 I52  0.2-  0.0     180924 C51  0.1-  0.2-
    161017 F51  0.2+  0.1-    180917 I52  0.2-  0.0     180924 C51  0.6-  0.1-
    161017 F51  0.0   0.2-    180917 I52  0.1-  0.2+    180924 C51  0.5+  1.2-
    180915 T05  0.4-  0.0     180917 I52  0.1-  0.3+    180924 C51  1.5+  2.6+
    180915 T05  0.6-  0.5+    180917 H06  0.1-  0.2+    180925 C51  0.4-  0.1+
    180915 T05  0.3+  0.0     180917 H06  0.0   0.3+    180925 C51  0.2+  0.2+
    180915 T05  0.5+  0.6+    180917 H06  0.4+  0.0     180927 204  0.0   0.0
    180915 T05  0.4-  0.3+    180917 H06  0.3+  0.1-    180927 204  0.2+  0.0
    180915 T05  0.0   0.0     180917 703  0.3+  0.3+    180927 204  0.0   0.1+
    180915 K88  0.3-  0.4-    180917 703  0.3-  1.0+    180928 H21  0.2+  0.3+
    180915 K88  0.2-  0.4+    180917 718  0.6-  0.2+    180928 H21  0.0   0.3+
    180915 K88  0.1-  0.1+    180917 718  0.1-  1.1-    180928 H21  0.1+  0.3+
    180915 K61  0.1+  0.1+    180917 718  1.7-  1.2-    180928 J95  0.0   0.2+
    180915 K61  0.1-  0.3+    180917 703  0.6-  0.2+    180928 J95  0.1-  0.2+
    180915 K61  0.1-  0.2+    180917 703  0.3+  0.9+    180928 J95  0.0   0.2-
    180915 K61  0.2-  0.2+    180917 U63  0.0   0.1+    180929 160  0.3+  1.0+
    180915 K61  0.2-  0.3+    180917 U63  0.1+  0.1+    180929 160  0.5+  0.3+
    180915 033  0.1+  0.0     180917 U63  0.2-  0.1+    180929 160  0.3-  0.0
    180915 033  0.1+  0.0     180917 U63  0.6+  0.4+    181003 Z43  0.4+  0.5+
    180915 033  0.2+  0.1-    180917 K88  0.1-  0.3+    181003 Z43  0.0   0.1-
    180915 033  0.2+  0.0     180917 K88  0.1-  0.3+    181005 T12  0.1-  0.0
    180915 033  0.1+  0.0     180917 K88  0.0   0.3+    181005 T12  0.0   0.1-
    180915 033  0.3+  0.1+    180917 118  0.6+  0.7-    181005 T12  0.0   0.0
    180915 A17  0.0   0.1-    180917 K51  0.0   0.1+    181012 T05  0.4-  0.0
    180915 104  0.1-  0.1+    180917 118  1.0+  0.9-    181012 T05  0.4+  0.7+
    180915 104  0.2+  0.0     180917 K51  0.1-  0.1+    181012 T05  0.5-  0.5+
    180915 A17  0.3+  0.2-    180917 K51  0.0   0.2-    181012 T05  0.3+  0.6-
    180915 104  0.1+  0.0     180917 118  1.0+  0.1-    181012 T05  0.1+  0.6+
    180915 G34  1.0-  0.6+    180917 C95  0.0   0.1+    181027 691  0.3+  0.3+
    180915 G34  0.6-  0.4+    180917 A17  0.1-  0.0     181027 691  0.1+  0.3-
    180915 A17  0.1-  0.0     180917 A17  0.2-  0.1+    181101 I52  0.3-  0.3+
    180915 G34  1.1-  0.7+    180917 C95  0.3+  0.1-    181101 I52  0.2-  0.2+
    180915 G34  1.1-  0.2-    180917 A17  0.2-  0.2+    181101 I52  0.1+  0.2-
    180915 C77  0.7+  0.2-    180917 C95  0.3+  0.1-    181101 I52  0.2-  0.4-
    180915 C77  0.7+  0.1+    180917 L04  0.3+  0.3-    181101 I52  0.6-  0.3-
    180915 C77  0.5+  0.9-    180917 L04  0.1+  0.1-    181107 I52  0.3-  0.3-
    180916 H21  0.2-  0.1+    180917 L04  0.3+  0.1-    181107 I52  0.1-  0.1-
    180916 H21  0.1-  0.1+    180917 Z80  1.0+  0.2+    181107 I52  0.2+  0.9-
    180916 H21  0.1-  0.2+    180917 Z80  0.4+  0.4+    181109 G96  0.1-  0.1+
    180916 H21  0.1-  0.1+    180917 Z80  0.4+  1.2-    181109 G96  0.3+  0.1-
    180916 H21  0.0   0.1+    180917 Z80  0.5-  0.7-    181109 G96  0.2+  0.1-
    180916 H21  0.1-  0.2+    180918 W34  0.2+  0.3+    181109 G96  0.2+  1.9+
    180916 I52  0.5+  0.3-    180918 W34  0.5-  0.0     181116 I52  0.1+  0.6-
    180916 I52  0.1-  0.1-    180918 W34  0.6+  0.1-    181116 I52  0.2+  0.0
    180916 I52  0.4+  0.0     180919 T05  0.2-  0.1-    181116 I52  0.1-  0.5-
    180916 K88  0.6-  0.2-    180919 T05  0.2-  0.2-    181116 I52  0.1+  0.1-
    180916 K88  0.6+  0.3+    180919 T05  0.4-  0.0     181117 I52  0.0   0.4-
    180916 K88  0.4-  0.0     180919 T05  0.2-  0.1+    181117 I52  0.1-  0.1-
    180916 595  0.1-  0.3+    180920 K61  0.1-  0.2-    181117 I52  0.1-  0.0
    180916 595  0.0   0.2+    180920 K61  0.2-  0.0     181127 691  0.1+  0.2+
    180916 595  0.2+  0.1-    180920 K61  0.1-  0.8-    181127 691  0.4+  0.3+
    180916 585  0.5+  0.3+    180920 K61  0.7-  0.5-    181204 691  0.1+  0.3+
    180916 585  0.3+  0.0     180921 I52  0.1-  0.0     181204 691  0.0   0.1+
    180916 585  0.1+  0.0     180921 I52  0.2-  0.0     181204 691  0.1+  0.1+
    180916 585  0.1+  0.2+    180921 I52  0.1-  0.0     181209 291  0.4+  0.2+
    180916 585  0.2+  0.4+    180921 I52  0.2-  0.2+    181209 291  0.4+  0.5+
    180916 585  0.2+  0.1+    180921 T08  1.6+  0.4+    181210 291  0.5-  0.5+
    180916 033  0.2+  0.1-    180921 T08  0.4-  0.3+    181210 291  0.2+  0.6+
    180916 033  0.0   0.2+    180921 T08  0.6-  0.5-    181210 291  0.2+  0.2-
    180916 033  0.3+  0.0     180921 T08  0.8+  0.5+    181220 I52  0.4+  0.1-
    180916 033  0.1+  0.0     180922 G96  0.3-  0.1+    181220 I52  0.4-  0.3+
    180916 Z43  0.2+  0.3-    180922 G96  0.1-  0.0     181220 I52  0.4+  0.1-
    180916 Z43  0.2+  0.0     180922 I52  0.1+  0.0     181220 I52  0.6+  0.1+
    180916 Z43  0.2-  0.0     180922 G96  0.1-  0.1+    190104 291  0.4-  0.3+
    180916 Z43  0.2+  0.5-    180922 G96  0.1+  0.1-    190104 291  0.0   0.3+
    180916 L01  0.2+  0.1-    180922 I52  0.1-  0.1+    190105 291  0.1+  0.4+
    180916 Z43  0.3-  0.2+    180922 I52  0.2+  0.0     190105 291  0.2-  0.5+
    180916 L01  0.2+  0.1-    180924 C51  0.2-  0.9-    201004 I52  0.1-  0.5-
    180916 033  0.1+  0.0     180924 C51  0.5-  0.8-    201004 I52  0.3+  0.8+
    180916 033  0.1+  0.0     180924 C51  1.3-  3.0-    201004 I52  0.0   0.8-
    
    Ephemeris:
    2018 RP8                 a,e,i = 0.78, 0.52, 15                  q = 0.3804
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 09 04    12 47 28.1 -10 18 39   0.7037  0.5744    33.6   103.7    21.5
    ...
    2020 09 19    14 42 01.2 -14 24 24   0.5387  0.7430    46.3   102.0    21.4
    ...
    2020 09 27    15 51 18.8 -14 21 29   0.5059  0.8231    54.9    94.9    21.2
    ...
    2020 10 03    16 42 11.7 -13 19 39   0.5046  0.8778    61.3    88.5    21.0
    2020 10 04    16 50 20.3 -13 05 29   0.5061  0.8864    62.3    87.4    21.0
    2020 10 05    16 58 21.5 -12 50 26   0.5080  0.8949    63.3    86.3    21.0
    ...
    2020 10 11    17 43 29.1 -11 06 56   0.5283  0.9432    68.5    80.1    21.0
    ...
    2020 10 19    18 35 01.3 -08 34 31   0.5735  1.0004    73.7    72.9    21.0
    ...
    2020 11 03    19 48 44.7 -04 10 20   0.6903  1.0863    78.2    63.4    21.3
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-T07
    


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