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  • MPEC 2018-U72 : 2015 WN2

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    M.P.E.C. 2018-U72                                Issued 2018 Oct. 26, 23:24 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 WN2
    
                               Revision to MPEC 2015-W58
    
    Additional Observations:
         K15W02N  C2018 09 15.41362822 29 45.859+37 35 21.02         24.74GVEU072T12
         K15W02N  C2018 09 15.42518322 29 44.417+37 35 14.00         24.80GVEU072T12
         K15W02N  C2018 09 15.43677222 29 42.962+37 35 06.99         24.76GVEU072T12
         K15W02N KC2018 10 04.30673521 58 10.930+31 58 24.29         24.60GVEU072T12
         K15W02N KC2018 10 06.23432121 55 59.406+31 10 05.49         24.71GVEU072T12
         K15W02N KC2018 10 10.38592221 52 04.949+29 20 24.69         24.65GVEU072T12
         K15W02N KC2018 10 12.29413621 50 42.238+28 27 59.31         24.86GVEU072T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. Hung, D. Fohring.
        Measurer D. J. Tholen.  2.24-m f/10.1 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    180915 T12 15.3+  8.9+    181012 T12 12.4+ 11.0+    MPO381155   -0.0050 day
    
    Orbital elements:
    2015 WN2                                                 Earth MOID = 0.0654 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M  34.54994              (2000.0)            P               Q
    n   0.63806903     Peri.  246.69989     -0.60653259     -0.74492057
    a   1.3362599      Node   243.62421     +0.79433542     -0.55286293
    e   0.3149009      Incl.   18.06870     +0.03390364     -0.37341120
    P   1.54           H   23.1           G   0.15           U   1
    Residuals in seconds of arc
    151120 G96  0.8-  0.3-    151122 H01  0.2+  0.3-    151210 474  0.0   0.4-
    151120 G96  0.0   0.3+    151122 H01  0.0   0.4-    151210 474  0.3-  0.5-
    151120 G96  0.0   0.2-    151122 H01  0.2+  0.4-    151210 474  0.5-  0.1-
    151120 G96  0.3+  0.3-    151123 G96  0.0   0.1+    151216 807  0.2-  0.3+
    151120 711  0.0   0.4-    151123 G96  0.0   0.3+    151216 807  0.5-  0.1+
    151120 711  0.9+  0.7+    151123 G96  0.5+  0.6+    151216 807  0.0   0.2+
    151120 711  0.6-  0.8-    151123 G96  0.1+  0.7+    151230 807  0.3-  0.2+
    151120 H01  0.3-  0.2-    151129 926  0.5+  0.0     151230 807  0.4-  0.4-
    151120 H01  0.1-  0.1-    151129 926  0.8+  0.7+    151230 807  0.7-  0.3-
    151120 H01  0.1-  0.1-    151129 926  0.9-  0.2-    160528 705  0.1-  0.1-
    151120 H01  0.1-  0.2-    151130 705  0.1+  0.1-    160528 705  0.3-  0.1+
    151121 H01  0.0   0.8-    151130 705  0.2+  0.5+    160528 705  0.0   0.0
    151121 G96  0.1-  0.1+    151130 705  0.4+  0.7+    180915 T12  0.0   0.0
    151121 H01  0.1+  0.3-    151201 926  0.2-  0.4+    180915 T12  0.0   0.0
    151121 G96  0.0   0.2-    151201 926  0.3-  0.4-    180915 T12  0.1-  0.0
    151121 H01  0.0   0.4-    151201 926  0.8-  0.7-    181004 T12  0.0   0.1-
    151121 G96  0.3-  0.7+    151204 G96  1.3+  0.5+    181006 T12  0.0   0.0
    151121 G96  0.8+  0.6+    151204 G96  0.0   1.0+    181010 T12  0.1-  0.1+
    151121 H01  0.1-  0.2-    151204 G96  0.3+  0.0     181012 T12  0.0   0.1+
    151122 H01  0.0   0.2-    151204 G96  0.4+  0.4-
    
    Ephemeris:
    2015 WN2                 a,e,i = 1.34, 0.31, 18                  q = 0.9155
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 09 26    22 10 11.3 +35 00 50   0.6401  1.5298   136.1    27.0    24.3
    ...
    2018 10 11    21 51 37.1 +29 03 39   0.6190  1.4723   129.6    31.5    24.2
    ...
    2018 10 19    21 47 51.8 +25 17 48   0.6189  1.4393   124.4    34.8    24.3
    ...
    2018 10 25    21 47 56.4 +22 25 31   0.6229  1.4136   120.1    37.5    24.3
    2018 10 26    21 48 11.0 +21 57 01   0.6239  1.4092   119.4    37.9    24.3
    2018 10 27    21 48 29.4 +21 28 39   0.6249  1.4049   118.6    38.4    24.4
    ...
    2018 11 02    21 51 37.4 +18 41 55   0.6323  1.3781   114.2    41.1    24.4
    ...
    2018 11 10    21 59 01.6 +15 13 12   0.6451  1.3413   108.3    44.5    24.5
    ...
    2018 11 25    22 21 21.8 +09 38 23   0.6723  1.2696    98.0    50.3    24.6
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-U72
    

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