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  • MPEC 2016-O407: 2015 WF9

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    M.P.E.C. 2016-O407                               Issued 2016 July 29, 18:55 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
    
                                       2015 WF9
    
                               Revision to MPEC 2015-W72
    
    Additional Observations:
         K15W09F 2C2016 07 28.24974216 14 54.907+85 20 21.50         20.9 RtEO407568
         K15W09F 2C2016 07 28.25150116 14 55.514+85 20 19.04         20.9 RtEO407568
         K15W09F 2C2016 07 28.25319316 14 56.171+85 20 16.66         21.5 RtEO407568
         K15W09F 2C2016 07 29.24521616 20 47.091+84 57 30.68         20.9 RtEO407568
         K15W09F 2C2016 07 29.24780316 20 47.737+84 57 27.25         21.4 RtEO407568
    
    Observer details:
    568 Mauna Kea.  Observer D. Fohring.  Measurer D. J. Tholen.  2.24-m
        University of Hawaii reflector.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    160728 568  6.3+  1.4+    160729 568  6.2+  1.3+    MPO373590   -0.0018 day
    
    Orbital elements:
    2015 WF9                                                 Earth MOID = 0.4357 AU
    Epoch 2016 July 31.0 TT = JDT 2457600.5                 MPC
    M  27.41499              (2000.0)            P               Q
    n   0.41182830     Peri.  328.46045     -0.63612691     +0.25806087
    a   1.7891988      Node   245.97285     -0.43029714     -0.90090429
    e   0.7034986      Incl.   52.76239     -0.64045837     +0.34896426
    P   2.39           H   18.8           G   0.15           U   3
    Residuals in seconds of arc
    151122 G96  0.5+  0.0     151124 H01  0.0   0.2-    151213 F51  0.1+  0.0
    151122 G96  0.1-  0.6+    151129 291  0.5-  0.2-    151213 F51  0.1-  0.3-
    151122 G96  0.0   0.6+    151129 291  0.1-  0.0     151216 G96  0.2-  0.3+
    151122 G96  0.0   0.0     151129 291  0.1-  0.0     151216 G96  0.4+  0.0
    151122 G96  0.2+  0.1+    151203 291  0.2-  0.1+    151216 G96  0.2+  0.6+
    151122 G96  0.0   0.3-    151203 291  0.3-  0.2+    151216 G96  0.3+  0.5+
    151122 G96  0.3+  0.2+    151203 291  0.0   0.3+    160109 807  0.0   0.3-
    151122 G96  0.2-  0.4+    151204 G96  0.3+  0.0     160109 807  0.2+  0.5-
    151122 291  0.2-  0.1-    151204 G96  0.1+  0.0     160109 807  0.1+  0.7-
    151122 291  0.1+  0.3+    151204 G96  0.3+  0.0     160116 807  0.3-  0.8-
    151122 291  0.1-  0.1+    151204 G96  0.1+  0.1+    160116 807  0.2+  0.1-
    151123 H01  0.2-  0.1-    151204 705  0.1+  0.0     160116 807  0.1-  0.0
    151123 H01  0.1-  0.0     151204 705  0.0   0.1-    160202 H21  0.3-  0.5-
    151123 695  0.1-  0.2+    151204 705  0.0   0.3-    160202 H21  0.6-  0.5-
    151123 H01  0.1-  0.1-    151205 G96  0.3+  0.3+    160202 H21  0.6-  0.0
    151123 695  0.1-  0.2+    151205 G96  0.7+  0.5-    160301 291  0.3-  0.2+
    151123 H01  0.1-  0.1-    151205 G96  0.5+  0.1-    160301 291  0.3+  0.8+
    151123 695  0.3+  0.2+    151205 G96  0.4+  0.1-    160301 291  0.0   0.7+
    151124 695  0.4-  0.4+    151206 F51  0.0   0.1-    160728 568  0.0   0.0
    151124 695  0.1+  0.3+    151206 F51  0.2+  0.2+    160728 568  0.0   0.0
    151124 695  0.4-  0.2-    151206 F51  0.0   0.2-    160728 568  0.1+  0.1-
    151124 H01  0.1-  0.2+    151207 F51  0.0   0.1-    160729 568  0.0   0.0
    151124 H01  0.0   0.2-    151207 F51  0.1-  0.2+    160729 568  0.2-  0.1+
    151124 H01  0.1+  0.1-    151213 F51  0.0   0.3-
    
    Ephemeris:
    2015 WF9                 a,e,i = 1.79, 0.70, 53                  q = 0.5305
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2016 06 29    05 38 23.5 +77 22 40   0.6357  0.8294    54.5    86.8    20.5
    ...
    2016 07 14    07 28 55.0 +87 43 47   0.8328  1.0196    66.1    65.7    20.8
    ...
    2016 07 22    14 57 45.1 +87 42 35   0.9243  1.1189    70.3    58.7    21.0
    ...
    2016 07 28    16 13 18.1 +85 25 59   0.9860  1.1915    73.1    54.6    21.1
    2016 07 29    16 19 23.8 +85 03 01   0.9957  1.2034    73.5    54.0    21.2
    2016 07 30    16 24 45.4 +84 40 08   1.0053  1.2153    74.0    53.4    21.2
    ...
    2016 08 05    16 48 19.2 +82 24 31   1.0597  1.2855    76.6    50.1    21.3
    ...
    2016 08 13    17 10 34.3 +79 26 31   1.1248  1.3761    79.9    46.5    21.5
    ...
    2016 08 28    17 46 06.1 +73 50 12   1.2302  1.5368    86.0    41.0    21.8
    
    A. U. Tomatic                (C) Copyright 2016 MPC           M.P.E.C. 2016-O407
    

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