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  • MPEC 2020-D142 : 2019 GD20

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    M.P.E.C. 2020-D142                            Issued 2020 February 29, 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
    
                                    2019 GD20                                
    
    
                               Revision to MPEC 2019-G186                           
    
    Additional Observations:
         K19G20D KC2020 02 28.08792012 18 56.71 -10 24 37.8          21.5 GVED142Z84
         K19G20D KC2020 02 28.09711212 18 55.71 -10 24 22.3          21.2 GVED142Z84
         K19G20D KC2020 02 28.10630512 18 54.80 -10 24 06.4          21.9 GVED142Z84
         K19G20D KC2020 02 28.11549612 18 53.82 -10 23 49.5          21.2 GVED142Z84
         K19G20D KC2020 02 29.13226 12 17 11.77 -09 53 38.9          21.4 GVED142J04
         K19G20D KC2020 02 29.13527 12 17 11.47 -09 53 32.6          22.0 GVED142J04
         K19G20D KC2020 02 29.13980 12 17 10.88 -09 53 25.4          21.9 GVED142J04
    
    Observer details:
    J04 ESA Optical Ground Station, Tenerife.  Observer P. Ruiz.  Measurers E. 
       Schwab, M. Micheli, D. Koschny, A. Knofel, M. Busch.  1.0-m f/4.4 
       reflector + CCD.
    Z84 Calar Alto-Schmidt.  Observer E. Schwab.  Measurers E. Schwab, D. Koschny, 
       M. Micheli.  0.8-m f/3 Schmidt + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    200228 Z84 0.08- 0.00-    200229 J04 0.08- 0.00-    MPO467567   -0.08 days
    
    Orbital elements:
    2019 GD20                                                Earth MOID = 0.2191 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M 311.42086              (2000.0)            P               Q
    n   0.94760834     Peri.  156.72134     +0.89214456     +0.45096400
    a   1.0265579      Node   176.14792     -0.45107046     +0.89248561
    e   0.5363665      Incl.   23.35985     -0.02476948     -0.01004520
    P   1.04           H   21.3           G   0.15           U   4
    Residuals in seconds of arc
    190407 F51  0.1+  0.0     190409 033  0.1-  0.0     190412 711  0.2-  0.2+
    190407 F51  0.1+  0.1-    190409 I93  0.0   1.1+    190412 711  0.1-  0.2+
    190407 F51  0.0   0.2-    190409 I93  0.7-  0.2-    190412 711  0.5-  0.8+
    190407 F51  0.0   0.1+    190409 I93  0.1+  0.0     190414 L01  0.1-  0.5-
    190408 I52  0.1-  0.0     190410 H21  0.1+  0.1-    190414 L01  1.0-  0.5+
    190408 I52  0.2+  0.6+    190410 H21  0.1+  0.4-    190422 I52  0.1-  0.0
    190408 I52  0.1-  0.3-    190410 H21  0.1+  0.2-    190422 I52  0.2-  0.7-
    190408 033  0.2-  0.3+    190410 291  0.0   0.1+    190422 I52  0.2-  0.2+
    190408 033  0.0   0.0     190410 291  0.0   0.2+    190424 G96  0.4-  0.1-
    190408 033  0.0   0.1-    190410 291  0.2-  0.1-    190424 G96  0.1+  0.4-
    190408 033  0.0   0.1-    190410 033  0.1+  0.0     190424 G96  0.8+  0.4-
    190409 H21  0.2+  0.0     190410 033  0.1+  0.1-    190424 G96  0.4-  0.1+
    190409 H21  0.6+  0.2-    190410 033  0.1+  0.1+    190428 I52  1.3+  0.8+
    190409 H21  0.2+  0.1-    190410 033  0.2+  0.1-    190428 I52  0.7-  0.2+
    190409 I52  0.5+  0.3+    190410 033  0.1+  0.0     200228 Z84  0.3+  0.2+
    190409 I52  0.4-  0.1-    190411 033  0.1+  0.1+    200228 Z84  0.5-  0.3-
    190409 I52  0.3+  0.2+    190411 033  0.1-  0.2-    200228 Z84  0.1+  0.3-
    190409 I52  0.7-  0.5-    190411 033  0.1-  0.1+    200228 Z84  0.4-  0.6+
    190409 033  0.2-  0.3+    190411 033  0.1-  0.0     200229 J04  0.4+  0.2-
    190409 033  0.3-  0.2+    190411 I52  0.5+  0.5-    200229 J04  0.8+  0.6+
    190409 033  0.0   0.0     190411 I52  0.5+  0.3+    200229 J04  0.6-  0.5-
    190409 033  0.1-  0.1-    190411 I52 (1.6+  0.5-)
    
    Ephemeris:
    2019 GD20                a,e,i = 1.03, 0.54, 23                  q = 0.4759
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 01 30    12 36 19.2 -17 12 39   0.8891  1.5682   113.5    35.2    23.5
    ...
    2020 02 14    12 34 10.3 -15 14 02   0.7143  1.5450   129.7    29.4    22.8
    ...
    2020 02 22    12 27 22.5 -12 56 56   0.6292  1.5266   140.2    24.5    22.4
    ...
    2020 02 28    12 19 05.4 -10 27 00   0.5718  1.5100   149.2    19.6    22.0
    2020 02 29    12 17 25.5 -09 57 31   0.5629  1.5070   150.8    18.7    21.9
    2020 03 01    12 15 40.6 -09 26 39   0.5542  1.5040   152.4    17.8    21.8
    ...
    2020 03 07    12 03 27.8 -05 51 56   0.5070  1.4842   162.7    11.4    21.4
    ...
    2020 03 15    11 42 50.3 +00 11 51   0.4597  1.4540   177.9     1.4    20.6
    ...
    2020 03 30    10 56 06.1 +13 49 52   0.4276  1.3852   149.8    21.2    21.2
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-D142
    


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