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  • MPEC 2020-X146 : 2018 YG

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    M.P.E.C. 2020-X146                            Issued 2020 December 13, 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 YG                                 
    
    
                               Revision to MPEC 2018-Y34                            
    
    Additional Observations:
         K18Y00G 2C2020 12 12.16430804 09 25.136+56 59 28.53               VEX146J04
         K18Y00G 2C2020 12 12.99157603 56 14.472+54 37 39.34         20.8 GVEX146J04
         K18Y00G 2C2020 12 13.00022603 56 06.169+54 36 06.46         20.9 GVEX146J04
    
    Observer details:
    J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers M.
        Micheli, D. Koschny, L. Conversi, R. Kresken, A. Knofel, M. Busch, E.
        Schwab.  1.0-m f/4.4 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    201212 J04 0.01+ 0.13+    201213 J04 0.01+ 0.14+    MPO467301   +0.04 days
    
    Orbital elements:
    2018 YG                                                  Earth MOID = 0.0756 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 207.86191              (2000.0)            P               Q
    n   1.45800518     Peri.  342.56902     -0.31505368     +0.81241073
    a   0.7702470      Node   266.71958     -0.80165946     -0.50452096
    e   0.4377343      Incl.   29.43578     -0.50801898     +0.29231390
    P   0.68           H   24.3           G   0.15           U   5
    Residuals in seconds of arc
    181216 F51  0.1+  0.2+    181217 568  0.0   0.2+    181219 I52  0.1-  0.0
    181216 F51  0.0   0.1+    181217 568  0.1-  0.1+    181219 I52  0.1+  0.5-
    181216 F51  0.2-  0.5-    181218 L01  0.3+  0.2+    181219 I52  0.1+  0.4+
    181216 F51  0.1+  0.0     181218 L01  0.1-  0.0     201212 J04  0.4+  0.1-
    181217 568  0.0   0.2+    181218 L01  0.3+  0.1-    201212 J04  0.3-  0.1-
    181217 568  0.0   0.2+    181219 I52  0.6-  0.1-    201213 J04  0.0   0.2+
    
    Ephemeris:
    2018 YG                  a,e,i = 0.77, 0.44, 29                  q = 0.4331
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 11 13    10 10 34.3 +62 20 59   0.3352  1.0957    99.4    63.0    24.4
    ...
    2020 11 28    08 45 28.3 +67 56 32   0.2200  1.1074   118.1    51.8    23.1
    ...
    2020 12 06    06 19 01.5 +67 45 10   0.1651  1.1039   132.7    41.0    22.2
    ...
    2020 12 12    04 12 18.5 +57 26 20   0.1357  1.0969   143.7    32.1    21.5
    2020 12 13    03 56 07.9 +54 35 48   0.1325  1.0953   144.7    31.3    21.4
    2020 12 14    03 41 36.2 +51 29 06   0.1299  1.0937   145.3    30.8    21.4
    ...
    2020 12 20    02 42 26.1 +29 46 56   0.1281  1.0815   137.3    38.1    21.5
    ...
    2020 12 28    02 06 36.4 +05 00 36   0.1587  1.0593   114.6    57.6    22.5
    ...
    2021 01 12    01 43 42.4 -17 09 05   0.2569  0.9988    85.9    79.2    24.1
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-X146
    


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