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  • MPEC 2019-A200: 2017 WN28

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    M.P.E.C. 2019-A200                               Issued 2019 Jan. 12, 23:39 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 WN28
    
                               Revision to MPEC 2017-X02
    
    Additional Observations:
         K17W28N  C2014 02 26.47959810 44 30.836+04 00 49.80         22.4 GVEA200F51
         K17W28N  C2014 02 26.49113810 44 29.836+04 00 53.16         22.5 GVEA200F51
         K17W28N  C2014 02 26.50269510 44 28.850+04 00 56.45         23.4 GVEA200F51
         K17W28N  C2016 01 31.39695809 26 59.617+19 01 05.07         21.9 GVEA200F51
         K17W28N  C2016 01 31.41180609 26 58.140+19 01 08.04         22.1 GVEA200F51
         K17W28N KC2016 02 03.39042109 22 12.206+19 10 56.40         21.4 GVEA200F51
         K17W28N  C2016 02 05.53760809 18 44.905+19 17 31.87         22.3 GVEA200F51
         K17W28N  C2016 02 05.55014909 18 43.676+19 17 33.68         22.4 GVEA200F51
         K17W28N  C2016 02 05.56262609 18 42.442+19 17 35.93         22.8 GVEA200F51
         K17W28N  C2016 02 05.57512509 18 41.231+19 17 37.86         22.2 GVEA200F51
    
    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.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    140226 F51  3.4-  1.8+    160205 F51  1.8-  0.8+    MPO441101   -0.0023 day
    
    Orbital elements:
    2017 WN28                                           PHA, Earth MOID = 0.0029 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M 284.47103              (2000.0)            P               Q
    n   0.43576221     Peri.   11.36646     +0.92937215     +0.35679434
    a   1.7230703      Node   327.22743     -0.35091584     +0.77431694
    e   0.4142033      Incl.   10.07395     -0.11456643     +0.52261943
    P   2.26           H   19.9           G   0.15           U   2
    Residuals in seconds of arc
    140226 F51  0.1-  0.0     171125 568  0.1+  0.2-    180118 T12  0.0   0.0
    140226 F51  0.0   0.1+    171125 568  0.1+  0.2-    180118 T12  0.1+  0.0
    140226 F51  0.3+  0.1+    171125 568  0.1+  0.2-    180118 T12  0.0   0.0
    160131 F51  0.0   0.2-    171201 H21  0.2+  0.1-    180118 291  0.0   0.1+
    160131 F51  0.3-  0.3-    171201 H21  0.2+  0.3-    180118 291  0.1-  0.1+
    160203 F51  0.1+  0.1-    171201 H21  0.0   0.5-    180126 H21  0.2-  0.9-
    160205 F51  0.0   0.3+    171209 291  0.4+  0.6+    180126 H21  0.0   1.0-
    160205 F51  0.1+  0.0     171209 291  0.3-  0.1-    180126 H21  0.2+  0.9-
    160205 F51  0.0   0.1+    171212 291  0.7-  0.1+    180204 695  0.1+  0.3+
    160205 F51  0.2+  0.0     171212 291  0.2-  0.1-    180204 695  0.2+  0.3+
    171113 F51  0.0   0.0     171212 291  0.1+  0.3+    180205 695  0.0   0.3+
    171113 F51  0.0   0.0     171219 291  0.0   0.4+    180205 695  0.2-  0.4+
    171113 F51  0.0   0.1+    171219 291  0.4+  0.5+    180205 695  0.2-  0.7+
    171113 F51  0.0   0.0     171219 291  0.2-  0.2+    180304 695  0.4-  0.6+
    171124 F51  0.0   0.0     180105 695  0.3+  0.1+    180304 695  0.3-  0.4+
    171124 F51  0.1-  0.0     180105 695  0.1+  0.0
    171124 F51  0.0   0.1-    180105 695  0.1-  0.1+
    
    Ephemeris:
    2017 WN28                a,e,i = 1.72, 0.41, 10                  q = 1.0094
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 12 13    13 10 53.5 -12 38 54   2.6601  2.3230    59.6    21.4    24.9
    ...
    2018 12 28    13 31 00.2 -15 28 35   2.4431  2.2880    69.3    23.7    24.8
    ...
    2019 01 05    13 41 13.8 -16 57 47   2.3213  2.2673    74.6    24.7    24.7
    ...
    2019 01 11    13 48 35.7 -18 04 02   2.2280  2.2509    78.6    25.4    24.6
    2019 01 12    13 49 47.6 -18 15 01   2.2123  2.2481    79.3    25.5    24.6
    2019 01 13    13 50 58.9 -18 26 00   2.1966  2.2453    80.0    25.6    24.5
    ...
    2019 01 19    13 57 55.1 -19 31 28   2.1017  2.2278    84.1    26.1    24.4
    ...
    2019 01 27    14 06 33.5 -20 57 58   1.9743  2.2034    89.8    26.5    24.3
    ...
    2019 02 11    14 20 16.9 -23 37 41   1.7359  2.1539   101.0    26.7    24.0
    
    A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-A200
    

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