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  • MPEC 2020-M69 : 2018 CG2

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    M.P.E.C. 2020-M69                                 Issued 2020 June 22, 15:00 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
    
                                    2018 CG2                                 
    
    
                               Revision to MPEC 2018-C63                            
    
    Additional Observations:
         K18C02G KC2020 06 19.57410020 23 22.61 -37 18 55.3          20.9 GVEM069474
         K18C02G KC2020 06 19.57762020 23 22.42 -37 19 00.1          21.2 GVEM069474
         K18C02G KC2020 06 19.58114020 23 22.36 -37 19 05.3          21.2 GVEM069474
         K18C02G KC2020 06 19.58466020 23 22.18 -37 19 10.0          21.4 GVEM069474
         K18C02G KC2020 06 21.08973720 22 23.429-37 55 27.43         21.2 GVEM069J04
         K18C02G KC2020 06 21.09742220 22 23.052-37 55 38.91         21.2 GVEM069J04
         K18C02G KC2020 06 21.10511320 22 22.692-37 55 50.60         21.1 GVEM069J04
         K18C02G KC2020 06 21.50199420 22 05.84 -38 05 25.0          21.2 GVEM069474
         K18C02G KC2020 06 21.50551420 22 05.69 -38 05 30.2          20.9 GVEM069474
         K18C02G KC2020 06 21.50903320 22 05.55 -38 05 35.5          21.2 GVEM069474
         K18C02G KC2020 06 22.10144220 21 38.690-38 20 28.61         20.8 GVEM069J04
         K18C02G KC2020 06 22.10694120 21 38.420-38 20 36.95         20.8 GVEM069J04
         K18C02G KC2020 06 22.11243920 21 38.145-38 20 45.50         21.3 GVEM069J04
    
    Observer details:
    474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M.
        Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
    J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers M.
        Micheli, D. Koschny, L. Conversi, M. Busch, A. Knofel, E. Schwab.  1.0-m
        f/4.4 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    200619 474 16.7-  1.2-    200622 J04 17.2-  1.6-    MPO529358   -0.01 days
    
    Orbital elements:
    2018 CG2                                                 Earth MOID = 0.2849 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M 307.71034              (2000.0)            P               Q
    n   0.34577548     Peri.  337.40864     +0.53524262     -0.77139424
    a   2.0103573      Node    78.58952     +0.81870602     +0.37344934
    e   0.7019031      Incl.   20.55641     +0.20793219     +0.51525384
    P   2.85           H   19.2           G   0.15           U   2
    Residuals in seconds of arc
    180207 G96  0.1-  0.1-    180210 I52  0.1+  0.1-    180318 I52  0.3+  0.2-
    180207 G96  0.1+  0.2-    180210 I52  0.5+  0.3+    180318 I52  0.4+  0.2+
    180207 G96  0.1-  0.2-    180210 I52  0.1+  0.2-    180318 I52  0.1+  0.1-
    180207 G96  0.2+  0.1-    180210 I52  0.6-  0.8+    180319 I52  0.0   0.2+
    180207 I52  0.2-  0.1-    180212 C51  0.0   0.4+    180319 I52  0.4-  0.3-
    180207 I52  0.1+  0.5-    180212 C51  0.2+  0.2+    180319 I52  0.6+  0.3+
    180207 I52  0.1-  0.3-    180212 C51  1.2+  0.5+    180319 I52  0.2-  0.4-
    180207 I52  0.0   0.2-    180212 C51  0.4+  0.4+    180324 G96  0.6-  0.1+
    180207 C42  0.1+  0.1-    180218 I52  0.2+  0.1+    180324 G96  0.1-  0.1-
    180207 C42  0.3-  0.2+    180218 I52  0.3+  0.4+    180324 G96  0.1-  0.1-
    180207 C42  0.2-  0.2+    180218 I52  0.2+  0.2+    180324 G96  0.2+  0.5+
    180208 711  0.4-  0.3+    180218 I52  0.0   0.1-    180404 I52  0.4-  0.4-
    180208 711  0.5-  0.1+    180223 A17  0.2-  0.1-    180404 I52  0.3-  0.4-
    180208 711  0.3-  0.4+    180223 A17  0.2-  0.0     180404 I52  0.5+  0.1-
    180208 I52  0.2+  0.2-    180223 A17  0.1-  0.1+    180405 G96  0.2+  0.3-
    180208 I52  0.2-  0.1-    180223 I52  0.1-  0.2+    180405 G96  0.2-  0.4-
    180208 I52  0.1+  0.2-    180223 I52  0.5+  0.6+    180405 G96  0.0   0.0
    180208 291  0.4-  0.2+    180223 I52  0.2-  0.2+    180405 G96  0.3-  0.3+
    180208 291  0.3-  0.2+    180223 I52  0.2+  0.0     200619 474  0.1+  0.2-
    180208 291  0.8-  0.0     180227 I52  0.3-  0.6+    200619 474  0.5-  0.0
    180209 I52  0.3-  0.4-    180227 I52  0.9-  0.4-    200619 474  0.5+  0.2-
    180209 I52  0.1-  0.1-    180227 I52  1.0+  0.8-    200619 474  0.0   0.1+
    180209 I52  0.0   0.4-    180306 I52  0.1-  0.2+    200621 J04  0.1+  0.4+
    180209 I52  0.0   0.4-    180306 I52  0.1-  0.4-    200621 J04  0.1-  0.2+
    180210 104  0.1-  0.3-    180306 I52  0.0   0.1+    200621 J04  0.2-  0.1-
    180210 104  0.1+  0.2+    180306 I52  0.1-  0.6+    200621 474  0.4-  0.0
    180210 104  0.7+  0.1+    180306 H21  0.3-  0.1-    200621 474  0.3-  0.0
    180210 L01  0.3-  0.1+    180306 H21  0.1-  0.1-    200621 474  0.0   0.0
    180210 L01  0.2+  0.3-    180308 F51  0.1-  0.0     200622 J04  0.2+  0.1+
    180210 L01  0.4+  0.1-    180308 F51  0.1+  0.1-    200622 J04  0.3+  0.1+
    180210 L01  0.5-  0.1-    180308 F51  0.3+  0.0     200622 J04  0.3+  0.2-
    180210 L01  0.0   0.0     180318 I52  0.2-  0.0
    
    Ephemeris:
    2018 CG2                 a,e,i = 2.01, 0.70, 21                  q = 0.5993
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 05 23    20 22 02.2 -29 40 35   1.4336  2.1362   120.7    24.0    22.8
    ...
    2020 06 07    20 26 34.2 -33 05 28   1.1712  2.0125   133.9    21.3    22.1
    ...
    2020 06 15    20 25 29.5 -35 36 54   1.0452  1.9433   141.1    19.2    21.7
    ...
    2020 06 21    20 22 27.0 -37 53 07   0.9585  1.8898   146.2    17.4    21.4
    2020 06 22    20 21 43.2 -38 17 47   0.9448  1.8808   147.1    17.1    21.4
    2020 06 23    20 20 55.2 -38 43 01   0.9313  1.8717   147.9    16.8    21.3
    ...
    2020 06 29    20 14 30.7 -41 25 56   0.8550  1.8164   152.0    15.2    21.0
    ...
    2020 07 07    20 00 49.1 -45 30 33   0.7670  1.7404   154.5    14.6    20.6
    ...
    2020 07 22    19 13 21.0 -53 38 46   0.6475  1.5910   145.1    21.4    20.3
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-M69
    


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