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  • MPEC 2017-W112: 2008 WM61

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    M.P.E.C. 2017-W112                               Issued 2017 Nov. 24, 21:45 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
    
                                       2008 WM61
    
                               Revision to MPEC 2008-W66
    
    Additional Observations:
         K08W61M  C2017 11 24.13996 00 16 17.89 +01 11 21.5          19.8 GUEW112G96
         K08W61M  C2017 11 24.14516 00 16 19.49 +01 10 50.3          20.0 GUEW112G96
         K08W61M  C2017 11 24.15039 00 16 21.09 +01 10 19.2          20.2 GUEW112G96
         K08W61M  C2017 11 24.15561 00 16 22.69 +01 09 48.3          20.1 GUEW112G96
         K08W61M  C2017 11 24.24020 00 16 49.67 +01 01 19.3          20.3 GUEW112G96
         K08W61M  C2017 11 24.24061 00 16 49.83 +01 01 17.2          19.6 GUEW112G96
         K08W61M  C2017 11 24.24101 00 16 49.95 +01 01 14.6          20.0 GUEW112G96
         K08W61M  C2017 11 24.24143 00 16 50.06 +01 01 12.1          20.2 GUEW112G96
         K08W61M  C2017 11 24.24187 00 16 50.25 +01 01 09.4          20.0 GUEW112G96
         K08W61M  C2017 11 24.24227 00 16 50.37 +01 01 07.0          20.3 GUEW112G96
         K08W61M  C2017 11 24.24268 00 16 50.51 +01 01 04.7          19.8 GUEW112G96
         K08W61M  C2017 11 24.24308 00 16 50.65 +01 01 02.3          20.1 GUEW112G96
         K08W61M KC2017 11 24.26576 00 16 58.58 +00 58 46.8          20.0 RoEW112291
         K08W61M KC2017 11 24.26644 00 16 58.83 +00 58 42.8          20.0 RoEW112291
         K08W61M KC2017 11 24.26709 00 16 59.10 +00 58 38.6          19.9 RoEW112291
         K08W61M KC2017 11 24.76474 00 21 15.32 +00 03 58.9                UEW112J95
         K08W61M KC2017 11 24.76796 00 21 16.67 +00 03 36.5          19.9 GUEW112J95
    
    Observer details:
    291 LPL/Spacewatch II.  Observer M. J. Brucker.  1.8-m f/2.7 reflector + CCD.
    G96 Mt. Lemmon Survey.  Observer D. C. Fuls.  Measurers E. J. Christensen,
        D. C. Fuls, A. R. Gibbs, A. D. Grauer, J. A. Johnson, R. A. Kowalski,
        S. M. Larson, G. J. Leonard, R. G. Matheny, R. L. Seaman, F. C. Shelly.
        1.5-m reflector + 10K CCD.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
        + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    171124 G96 3.52+ 1.07+    171124 J95 3.83+ 0.97+    MPO149162   -0.18 day
    
    Orbital elements:
    2008 WM61                                                Earth MOID = 0.0095 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 306.88541              (2000.0)            P               Q
    n   0.54744087     Peri.  198.49852     +0.19367815     -0.98022390
    a   1.4799416      Node   240.35156     +0.90590544     +0.19458003
    e   0.3323147      Incl.    2.67885     +0.37659543     +0.03605156
    P   1.80           H   26.6           G   0.15           U   0
    Residuals in seconds of arc
    081124 704  0.6-  0.6+    081126 H55  0.6-  0.3+    081129 E10  0.4+  0.1-
    081124 704  0.2+  0.5+    081126 204  0.3+  0.0     081205 H55  0.3+  0.4+
    081124 704  0.3+  0.7+    081126 204  0.5+  0.4-    081205 H55  0.2+  0.3+
    081124 704  1.4+  0.0     081126 204  0.5+  0.1-    081205 H55  0.1-  0.2+
    081124 J95  0.1+  0.5-    081126 204  0.6+  0.4-    081207 H55  0.2+  0.1+
    081124 J95  0.0   0.4-    081126 204  0.5+  0.1-    081207 H55  0.0   0.1+
    081124 J95  0.2-  0.1-    081127 H55  0.4-  0.1+    081207 H55  0.0   0.1-
    081125 648  0.1-  0.1+    081127 H55  0.2-  0.1-    171124 G96  0.1-  0.3+
    081125 648  0.3+  0.3+    081127 H55  0.0   0.1-    171124 G96  0.0   0.1-
    081125 H55  0.1+  0.1+    081127 H55  0.3-  0.1+    171124 G96  0.1-  0.1-
    081125 648  0.5-  0.5+    081128 J95  0.4+  0.0     171124 G96  0.1-  0.1+
    081125 H55  0.1-  0.2+    081128 J95  0.0   0.1-    171124 G96  0.1-  0.3-
    081125 H55  0.4-  0.2+    081128 J95  0.2-  0.2-    171124 G96  0.3+  0.0
    081125 J69  0.8-  0.9+    081129 H55  0.7-  0.4+    171124 G96  0.0   0.1-
    081125 J69  0.5+  0.2+    081129 H55  0.0   0.1-    171124 G96  0.4-  0.1-
    081125 J69  0.3+  0.9+    081129 H55  0.4+  0.5-    171124 G96  0.2+  0.1-
    081125 J69  0.2+  1.3+    081129 H55  0.8-  0.8+    171124 G96  0.0   0.1-
    081125 J69  1.8+  0.0     081129 H55  0.4-  0.0     171124 G96  0.0   0.1+
    081125 J95  0.1-  0.1-    081129 E10  0.3+  0.1-    171124 G96  0.1+  0.1+
    081125 J95  0.2-  0.3-    081129 E10  0.0   0.2+    171124 291  0.1-  0.0
    081125 J95  0.1-  0.1-    081129 E10  0.2-  0.1+    171124 291  0.0   0.2+
    081126 H55  0.2-  0.1+    081129 E10  0.0   0.0     171124 291  0.7+  0.0
    081126 H55  0.5-  0.3+    081129 E10  0.5-  0.4+    171124 J95  0.4-  0.8+
    081126 H55  0.3-  0.2+    081129 E10  0.0   0.0     171124 J95  0.1+  0.1+
    
    Ephemeris:
    2008 WM61                a,e,i = 1.48, 0.33, 3                   q = 0.9881
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 10 25    23 44 21.9 +14 13 44   0.1053  1.0847   147.5    29.5    23.2
    ...
    2017 11 09    23 39 59.1 +11 19 33   0.06357 1.0343   132.2    45.2    22.4
    ...
    2017 11 17    23 48 11.8 +08 07 00   0.04254 1.0141   125.5    52.5    21.7
    ...
    2017 11 23    00 08 57.1 +02 55 20   0.02718 1.0024   122.6    56.1    20.8
    2017 11 24    00 15 17.2 +01 28 07   0.02469 1.0008   122.4    56.4    20.6
    2017 11 25    00 23 07.8 -00 17 52   0.02224 0.9993   122.5    56.4    20.4
    ...
    2017 12 01    02 41 15.4 -26 08 31   0.01024 0.9921   125.6    54.0    18.6
    ...
    2017 12 09    09 24 24.4 -30 18 02   0.01983 0.9878    97.8    81.0    20.9
    ...
    2017 12 24    10 35 02.4 -19 42 18   0.05701 0.9972   102.2    74.6    23.0
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-W112
    

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