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  • MPEC 2012-A40 : 2011 EC7

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    M.P.E.C. 2012-A40                                Issued 2012 Jan. 8, 15:16 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  They are published
       on behalf of Commission 20 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
    
                                       2011 EC7
    
                               Revision to MPEC 2011-E23
    
    Additional Observations:
         K11E07C 2C2011 11 24.34889903 11 07.707+07 12 21.91         24.6 RoEA040568
         K11E07C 2C2011 11 24.35612403 11 07.045+07 12 20.38         24.4 RoEA040568
         K11E07C 2C2011 11 24.36336703 11 06.411+07 12 19.03         24.4 RoEA040568
         K11E07C 2C2011 11 27.52342103 06 44.060+07 03 02.94         24.0 RoEA040568
    
    Observer details:
    568 Mauna Kea.  Observers M. Micheli, G. T. Elliott.  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
    111124 568 10.7+  3.8+    111127 568 10.2+  3.6+    MPO199002   +0.0010 day
    
    Orbital elements:
    2011 EC7                                            PHA, Earth MOID = 0.0468 AU
    Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
    M  79.71943              (2000.0)            P               Q
    n   0.28243236     Peri.  117.65726     +0.07927950     +0.99595533
    a   2.3006987      Node   156.77417     -0.94821004     +0.08843090
    e   0.7455274      Incl.    6.15493     -0.30759143     -0.01590494
    P   3.49           H   21.2           G   0.15           U   3
    Residuals in seconds of arc
    110303 G96  0.1+  0.2+    110304 291  0.6-  0.5-    110326 291  0.5+  0.5-
    110303 G96  0.7-  0.2+    110306 291  0.5+  0.5-    110326 291  0.4+  0.2-
    110303 G96  0.6+  0.5-    110306 291  0.4-  0.8+    110413 568  0.1-  0.1+
    110303 G96  0.6+  0.1-    110309 291  0.3-  0.0     110413 568  0.0   0.0
    110303 G96  0.4-  0.2-    110309 291  0.5-  1.0+    110413 568  0.1+  0.0
    110303 G96  0.8-  0.4+    110309 291  0.3+  0.0     111124 568  0.2+  0.1+
    110303 G96  0.2+  0.1+    110310 291  0.1-  0.3-    111124 568  0.2-  0.0
    110303 G96  0.3-  0.0     110310 291  1.5+  0.8-    111124 568  0.0   0.0
    110304 291  1.0-  0.0     110310 291  0.1-  0.5-    111127 568  0.0   0.0
    110304 291  0.0   0.9+    110326 291  0.0   0.1-
    
    Ephemeris:
    2011 EC7                 a,e,i = 2.30, 0.75, 6                   q = 0.5855
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2011 12 09    02 54 00.3 +06 46 12   1.5783  2.4547   145.6    13.1    24.9
    ...
    2011 12 24    02 44 45.0 +06 59 19   1.8366  2.5699   128.8    17.4    25.5
    ...
    2012 01 01    02 42 55.4 +07 19 22   1.9896  2.6288   120.5    18.8    25.8
    ...
    2012 01 07    02 42 47.2 +07 38 58   2.1094  2.6719   114.5    19.6    25.9
    2012 01 08    02 42 51.4 +07 42 34   2.1297  2.6790   113.6    19.7    26.0
    2012 01 09    02 42 57.1 +07 46 14   2.1501  2.6861   112.6    19.8    26.0
    ...
    2012 01 15    02 44 01.9 +08 09 56   2.2740  2.7279   106.9    20.2    26.2
    ...
    2012 01 23    02 46 41.9 +08 45 09   2.4423  2.7824    99.7    20.4    26.4
    ...
    2012 02 07    02 54 49.7 +09 58 40   2.7614  2.8803    86.8    20.0    26.7
    
    A. U. Tomatic                (C) Copyright 2012 MPC           M.P.E.C. 2012-A40
    

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