• MPC Preparation (Info)

  • MPEC 2019-P23 : 2017 OR18

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    M.P.E.C. 2019-P23                                Issued 2019 August 1, 22:20 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
    
                                    2017 OR18                                
    
    
    Additional Observations:
         K17O18R  C2012 09 26.58746601 42 27.716+24 26 09.67         21.5 GVEP023F51
         K17O18R  C2012 09 26.59849001 42 27.218+24 26 07.33         21.9 GVEP023F51
         K17O18R  C2012 10 10.44104 01 31 16.14 +23 03 05.3          21.3 VrEP023G96
         K17O18R  C2012 10 10.44796 01 31 15.74 +23 03 01.9          20.5 VrEP023G96
         K17O18R  C2012 10 10.45479 01 31 15.34 +23 02 57.4          21.2 VrEP023G96
         K17O18R  C2012 10 10.46160 01 31 14.91 +23 02 53.4          20.9 VrEP023G96
         K17O18R  C2012 11 01.42144701 14 53.764+19 01 34.34         21.6 GVEP023F51
         K17O18R  C2012 11 01.43356601 14 53.385+19 01 26.19         21.4 GVEP023F51
         K17O18R  C2012 11 07.27212701 13 09.036+17 59 43.25         21.1 GVEP023F51
         K17O18R  C2017 07 28.55878423 32 01.943+06 15 18.69         21.3 GVEP023F51
         K17O18R  C2017 07 28.57023323 32 02.788+06 15 33.75         21.2 GVEP023F51
         K17O18R  C2017 07 28.58188923 32 03.655+06 15 49.06         21.6 GVEP023F51
         K17O18R  C2017 07 28.59315923 32 04.505+06 16 03.77         21.3 GVEP023F51
         K17O18R  C2017 11 22.23693100 18 11.490+10 05 19.42         23.1 GVEP023F51
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe,
        E. Magnier, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber,
        Y. Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    G96 Mt. Lemmon Survey.  Observer A. Boattini.  Measurers A. Boattini,
        E. J. Christensen, A. R. Gibbs, A. D. Grauer, R. E. Hill, R. A. Kowalski,
        S. M. Larson, R. H. McNaught.  1.5-m 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
    120926 F51 0.12- 0.03-    171122 F51 0.00- 0.00-    MPO438037    0.03 days
    
    Orbital elements:
    2017 OR18 = 2017 TR6                                     Earth MOID = 0.2887 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M 245.58079              (2000.0)            P               Q
    n   0.39165647     Peri.   48.00942     +0.83513458     +0.54570817
    a   1.8501169      Node   278.80730     -0.52303522     +0.74906873
    e   0.2996676      Incl.    4.00039     -0.17024803     +0.37563099
    P   2.52           H   21.3           G   0.15           U   2
    Residuals in seconds of arc
    120926 F51  0.2+  0.2+    170729 F51  0.1-  0.0     171016 I52  0.2-  0.0
    120926 F51  0.0   0.1-    170911 F51  0.1+  0.1+    171016 I52  0.2+  0.1-
    121010 G96  0.4-  0.0     170911 F51  0.1-  0.0     171016 691  0.1-  0.2+
    121010 G96  0.2-  0.5+    170911 F51  0.0   0.1+    171016 691  0.0   0.2+
    121010 G96  0.0   0.1-    170911 F51  0.0   0.2+    171016 691  0.0   0.1-
    121010 G96  0.3-  0.2-    170917 J43  0.2-  0.4-    171017 I52  0.0   0.1-
    121101 F51  0.1-  0.0     170917 J43  0.1-  0.3-    171017 I52  0.3-  0.3-
    121101 F51  0.1-  0.0     170917 J43  0.1-  0.3-    171017 I52  0.3+  0.1+
    121107 F51  0.4+  0.4-    170918 J43  0.2-  0.0     171017 I52  0.1+  0.1+
    170727 F51  0.1+  0.1+    170921 F51  0.0   0.0     171018 H21  0.2-  0.2-
    170727 F51  0.1-  0.1+    170921 F51  0.0   0.0     171018 H21  0.1-  0.2-
    170727 F51  0.1+  0.1-    170921 F51  0.0   0.1-    171018 H21  0.2-  0.2-
    170727 F51  0.1+  0.1+    170921 F51  0.0   0.0     171023 G96  0.3-  0.3+
    170728 F51  0.3+  0.0     171015 G96  0.1-  0.3-    171023 G96  0.2+  0.3+
    170728 F51  0.1+  0.0     171015 G96  0.2+  0.1-    171023 691  0.0   0.3+
    170728 F51  0.1-  0.0     171015 G96  0.2-  0.1+    171023 G96  0.3+  0.1+
    170728 F51  0.0   0.0     171015 G96  0.2+  0.4-    171023 691  0.1-  0.5+
    170729 H21  0.9-  0.2+    171015 691  0.1+  0.1+    171023 G96  0.5-  0.2+
    170729 H21  0.4-  0.3-    171015 691  0.0   0.4+    171023 691  0.1-  0.4+
    170729 H21  0.4-  0.1-    171015 691  0.0   0.3+    171027 291  0.0   0.4+
    170729 658  0.3-  0.1-    171015 I52  0.2-  0.2+    171027 291  0.0   0.1+
    170729 658  0.1-  0.1+    171015 I52  0.1-  0.1+    171027 291  0.1-  0.2+
    170729 658  0.2-  0.1+    171015 I52  0.2+  0.2+    171110 H21  0.2-  0.3-
    170729 F51  0.0   0.0     171015 I52  0.1-  0.2-    171110 H21  0.4-  0.4+
    170729 F51  0.1+  0.1-    171016 I52  0.1-  0.0     171110 H21  0.6-  0.2-
    170729 F51  0.1+  0.2-    171016 I52  0.1-  0.0     171122 F51  0.4+  0.2-
    
    Ephemeris:
    2017 OR18                a,e,i = 1.85, 0.30, 4                   q = 1.2957
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2019 07 02    11 38 20.2 -01 52 21   1.9759  1.9950    76.2    29.7    25.6
    ...
    2019 07 17    11 59 54.4 -03 45 50   2.0873  1.9428    67.6    28.9    25.6
    ...
    2019 07 25    12 12 37.3 -04 55 07   2.1404  1.9140    63.4    28.3    25.6
    ...
    2019 07 31    12 22 40.6 -05 50 29   2.1770  1.8920    60.3    27.8    25.6
    2019 08 01    12 24 23.7 -05 59 59   2.1828  1.8883    59.8    27.7    25.6
    2019 08 02    12 26 07.6 -06 09 32   2.1886  1.8846    59.3    27.6    25.6
    ...
    2019 08 08    12 36 45.5 -07 08 17   2.2214  1.8622    56.4    27.0    25.6
    ...
    2019 08 16    12 51 35.3 -08 29 49   2.2605  1.8318    52.6    26.1    25.6
    ...
    2019 08 31    13 21 25.5 -11 09 46   2.3200  1.7737    46.0    24.2    25.5
    
    A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-P23
    


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