• MPC Preparation (Info)

  • MPEC 2018-P01 : 2013 BC18

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    M.P.E.C. 2018-P01                                Issued 2018 Aug. 1, 03:04 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
    
                                       2013 BC18
    
                               Revision to MPEC 2013-B31
    
    Additional Observations:
         K13B18C KC2018 07 15.55634322 43 42.812+17 29 41.04         24.73GVEP001T12
         K13B18C KC2018 07 17.57932522 42 11.758+17 38 13.47         24.62GVEP001T12
    
    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
    180715 T12  1.3+  0.5+    180717 T12  1.5+  0.4+    MPO266947   -0.0042 day
    
    Orbital elements:
    2013 BC18                                           PHA, Earth MOID = 0.0149 AU
    Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
    M  34.04896              (2000.0)            P               Q
    n   0.21590356     Peri.  262.27112     -0.90117494     +0.15944076
    a   2.7518802      Node   286.21171     +0.05355630     -0.88180808
    e   0.7705869      Incl.   24.81926     -0.43013423     -0.44383910
    P   4.57           H   19.0           G   0.15           U   0
    Residuals in seconds of arc
    130116 G96  0.6-  0.3-    130127 F65  0.3-  0.1+    130604 807  0.2-  0.2-
    130116 G96  0.3+  0.0     130127 F65  0.0   0.0     130604 807  0.1-  0.1-
    130116 G96  0.2-  0.3-    130131 291  0.1-  0.2+    130604 807  0.1+  0.2-
    130116 G96  0.3+  0.2-    130131 291  0.2-  0.1-    130604 807  0.0   0.1-
    130116 G96  0.4-  0.2-    130131 291  0.7-  0.5-    130605 G96  0.3-  0.1-
    130116 G96  0.2+  0.1-    130203 568  0.1+  0.1+    130605 G96  0.2-  0.1-
    130116 G96  0.3-  0.1+    130203 568  0.1+  0.0     130605 G96  0.4+  0.3+
    130116 G96  1.2+  0.1-    130203 568  0.1+  0.0     130605 G96  0.1-  0.2+
    130116 H01  0.0   0.2+    130205 H21  0.3+  0.1+    130607 807  0.0   0.4-
    130116 H01  0.1+  0.2+    130205 H21  0.0   0.1-    130607 807  0.0   0.3-
    130116 H01  0.1+  0.2+    130205 H21  0.3+  0.1-    130607 807  0.2+  0.1-
    130116 H01  0.1+  0.3+    130205 291  0.3-  0.0     130607 G96  0.0   0.1-
    130117 H01  0.3-  0.2+    130205 291  0.2-  0.1+    130607 G96  0.1-  0.1+
    130117 H01  0.3-  0.2+    130205 291  0.6-  0.1+    130607 G96  0.1-  0.0
    130117 H01  0.3-  0.2+    130206 H21  0.2-  0.3+    130607 G96  0.1-  0.1-
    130117 H01  0.2-  0.2+    130206 H21  0.4-  0.2+    130608 807  0.1+  0.2-
    130117 G96  0.1+  0.3+    130206 H21  0.5-  0.1+    130608 807  0.1-  0.1+
    130117 G96  0.1+  0.1-    130208 G48  0.1+  0.7+    130608 807  0.1+  0.0
    130117 G96  0.1-  0.1+    130208 G48  0.2-  0.2-    130608 291  0.0   0.4+
    130117 G96  0.3+  0.0     130208 G48  0.6-  0.2+    130608 291  0.0   0.2+
    130118 H21  0.3+  0.4+    130208 G96  0.2+  0.3-    130608 291  0.1-  0.1-
    130118 H21  0.4-  0.5+    130208 G96  0.5-  0.0     130609 291  0.2-  0.3+
    130118 H21  0.0   0.0     130208 G96  0.3-  0.1-    130609 291  0.1-  0.3+
    130118 H21  0.4+  0.2+    130208 G96  0.1-  0.0     130609 291  0.1-  0.4+
    130118 G96  0.3-  0.1+    130212 H21  0.5-  0.2+    130609 474  0.2-  0.1+
    130118 G96  0.1-  0.0     130212 H21  0.3-  0.1+    130609 474  0.1+  0.0
    130118 G96  0.1+  0.3+    130212 H21  0.1-  0.0     130609 474  0.3+  0.1+
    130119 H01  0.1-  0.2+    130214 H21  0.2+  0.1-    130609 474  0.3-  0.0
    130119 H01  0.1-  0.1+    130214 H21  1.0-  0.1+    130611 291  0.1+  0.3+
    130119 H01  0.0   0.1+    130216 H21  0.7-  0.0     130611 291  0.1+  0.2+
    130119 H01  0.1+  0.2+    130216 H21  0.5-  0.4+    130611 291  0.5+  0.2-
    130124 H21  0.1-  0.4+    130216 H21  0.7-  0.2-    130707 691  0.6-  0.6+
    130124 H21  0.1+  0.1-    130217 H21  0.4-  0.3-    130707 691  0.2-  0.0
    130124 H21  0.2+  0.3-    130217 H21  0.6-  0.2-    130707 691  0.9-  0.2+
    130125 204  0.0   0.3-    130217 H21  0.9-  0.3-    130715 H21  0.5-  0.8+
    130125 204  0.0   0.2-    130529 291  1.6-  0.2+    130715 H21  0.5-  1.1+
    130126 H21  0.3+  0.1+    130529 291  0.4-  0.3+    130715 H21  0.2+  1.0+
    130126 H21  0.1+  0.0     130529 291  0.4+  0.4-    180715 T12  0.0   0.0
    130126 H21  0.1-  0.2-    130604 807  0.1-  0.2-    180717 T12  0.1+  0.1-
    
    Ephemeris:
    2013 BC18                a,e,i = 2.75, 0.77, 25                  q = 0.6313
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 07 02    22 51 34.5 +16 13 07   2.6355  3.0986   107.6    18.2    24.5
    ...
    2018 07 17    22 42 38.4 +17 35 52   2.5509  3.2014   121.5    15.7    24.4
    ...
    2018 07 25    22 35 56.9 +18 02 17   2.5186  3.2545   129.0    14.0    24.4
    ...
    2018 07 31    22 30 12.2 +18 12 54   2.5023  3.2936   134.4    12.7    24.3
    2018 08 01    22 29 11.7 +18 13 52   2.5003  3.3000   135.3    12.5    24.3
    2018 08 02    22 28 10.3 +18 14 36   2.4985  3.3064   136.2    12.3    24.3
    ...
    2018 08 08    22 21 48.1 +18 14 02   2.4927  3.3446   141.3    10.9    24.3
    ...
    2018 08 16    22 12 53.2 +18 00 04   2.4992  3.3946   147.1     9.3    24.3
    ...
    2018 08 31    21 56 16.6 +16 57 01   2.5590  3.4852   152.4     7.7    24.3
    
                           (Last issue was M.P.E.C. 2018-O53)
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-P01
    

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