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  • MPEC 2019-S155 : 2017 GG4

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    M.P.E.C. 2019-S155                           Issued 2019 September 29, 20:13 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
    
                                    2017 GG4                                 
    
    
                               Revision to MPEC 2017-G37                            
    
    Additional Observations:
         K17G04G KC2019 09 27.10850606 03 12.348+15 51 23.91         20.8 GVES155J04
         K17G04G KC2019 09 27.11511606 03 11.821+15 51 32.35         20.1 GVES155J04
         K17G04G KC2019 09 27.12172506 03 11.293+15 51 40.78         20.7 GVES155J04
         K17G04G KC2019 09 29.10474706 00 29.037+16 32 33.06               VES155J04
         K17G04G KC2019 09 29.11025706 00 28.538+16 32 39.89         20.7 GVES155J04
    
    Observer details:
    J04 ESA Optical Ground Station, Tenerife.  Observer P. Ruiz.  Measurers M. 
       Micheli, D. Koschny, 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 (or two decimals in degrees), reference and Delta-T
    190927 J04 0.01- 0.03-    190929 J04 0.01- 0.03-    MPO477897   +0.06 days
    
    Orbital elements:
    2017 GG4                                                 Earth MOID = 0.1520 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 Williams
    M 320.86114              (2000.0)            P               Q
    n   0.45992208     Peri.  234.82811     +0.14604845     +0.95174093
    a   1.6621870      Node    46.06428     -0.74113509     +0.28599351
    e   0.6848335      Incl.   22.01398     -0.65527752     -0.11134144
    P   2.14           H   19.8           G   0.15           U   2
    Residuals in seconds of arc
    170214 F51  0.1-  0.1+    170403 J95  0.1+  0.2-    170408 291  0.1-  0.3+
    170214 F51  0.0   0.0     170403 J95  0.1+  0.2+    170408 291  0.4-  0.3+
    170214 F51  0.1-  0.1+    170403 I52  0.1-  0.1+    170414 926  0.2+  0.1+
    170214 F51  0.1-  0.1+    170403 I52  0.1-  0.1+    170414 926  0.9+  0.2+
    170401 F51  0.1-  0.2-    170403 I52  0.2-  0.1-    170414 926  0.4-  0.6-
    170401 F51  0.1-  0.1-    170403 926  0.3-  0.4+    170415 926  0.0   0.0
    170401 F51  0.0   0.1-    170403 926  0.3-  0.3+    170415 926  0.4-  0.2-
    170401 J95  0.2+  0.5-    170403 926  0.2-  0.1+    170415 926  0.5-  0.2-
    170401 033  0.2-  0.1-    170404 I52  0.2-  0.5+    170418 926  0.7+  0.7-
    170401 033  0.2-  0.1-    170404 I52  0.3-  0.0     170418 926  0.7-  0.3+
    170401 J95  0.4+  0.0     170404 I52  0.0   0.1-    170418 926  0.0   0.0
    170401 033  0.2-  0.1+    170404 I52  0.5-  0.1-    190927 J04  0.0   0.3-
    170401 033  0.3-  0.1+    170404 926  0.1-  0.4+    190927 J04  0.1+  0.2-
    170401 J95  0.6+  0.2+    170404 926  0.1+  0.0     190927 J04  0.2+  0.0
    170402 I93  0.3+  0.1+    170404 926  0.5-  0.2+    190929 J04  0.0   0.3+
    170402 I93  0.3-  0.0     170407 705  0.0   0.2+    190929 J04  0.2-  0.2+
    170402 I93  0.1-  0.1+    170407 705  0.1+  0.0
    170403 J95  0.0   0.3+    170408 291  0.4-  0.1-
    
    Ephemeris:
    2017 GG4                 a,e,i = 1.66, 0.68, 22                  q = 0.5239
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2019 08 30    06 28 43.1 +06 06 14   0.6428  0.8871    60.2    80.9    21.4
    ...
    2019 09 14    06 16 29.1 +11 23 07   0.6672  1.0728    76.8    65.9    21.4
    ...
    2019 09 22    06 09 11.0 +14 06 44   0.6668  1.1682    86.2    59.0    21.4
    ...
    2019 09 28    06 02 00.5 +16 09 49   0.6624  1.2375    93.8    53.9    21.3
    2019 09 29    06 00 37.3 +16 30 26   0.6615  1.2488    95.1    53.1    21.3
    2019 09 30    05 59 10.4 +16 51 06   0.6605  1.2601    96.4    52.2    21.3
    ...
    2019 10 06    05 49 05.2 +18 55 34   0.6541  1.3268   104.7    46.8    21.3
    ...
    2019 10 14    05 31 27.3 +21 40 30   0.6475  1.4125   116.7    39.1    21.2
    ...
    2019 10 29    04 45 11.0 +26 12 27   0.6582  1.5637   141.6    23.2    21.0
    
    A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-S155
    


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