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  • MPEC 2020-S117 : 2018 SQ3

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    M.P.E.C. 2020-S117                           Issued 2020 September 20, 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 SQ3                                 
    
    
                               Revision to MPEC 2018-T45                            
    
    Additional Observations:
         K18S03Q 5C2020 09 19.17458 02 28 37.49 +20 37 55.9          20.7 GVES117J04
         K18S03Q 5C2020 09 19.18212 02 28 38.92 +20 37 15.3          20.5 GVES117J04
         K18S03Q 5C2020 09 19.18966 02 28 40.33 +20 36 34.8          20.7 GVES117J04
         K18S03Q 5C2020 09 20.15512 02 31 57.03 +19 08 19.7          20.3 GVES117J04
         K18S03Q 5C2020 09 20.16266 02 31 58.45 +19 07 37.8          20.2 GVES117J04
         K18S03Q 5C2020 09 20.17022 02 31 59.87 +19 06 55.3          20.4 GVES117J04
    
    Observer details:
    J04 ESA Optical Ground Station, Tenerife.  Observer E. Kuusela.  Measurers E.
        Schwab, M. Micheli, D. Koschny, A. Knofel, M. Busch.  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
    200919 J04 0.11- 0.03-    200920 J04 0.11- 0.02-    MPO473502   -0.03 days
    
    Orbital elements:
    2018 SQ3                                                 Earth MOID = 0.1855 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M 287.24697              (2000.0)            P               Q
    n   0.50235054     Peri.  206.41280     +0.83727081     -0.54385942
    a   1.5672254      Node   187.34337     +0.54632681     +0.83632928
    e   0.2573453      Incl.   26.24438     +0.02246346     -0.06906709
    P   1.96           H   22.4           G   0.15           U   2
    Residuals in seconds of arc
    180930 G96  0.1+  0.4-    181002 K51  0.1+  0.3+    181014 474  0.1-  0.4+
    180930 G96  0.1+  0.2-    181002 L01  0.4-  0.0     181015 807  0.7-  0.1+
    180930 G96  0.2-  0.5-    181002 L01  0.6+  0.4-    181015 807  0.5-  0.3+
    180930 G96  0.6+  0.3+    181003 204  0.1-  0.3-    181028 807  0.0   0.2+
    180930 691  0.0   0.0     181003 204  0.3+  0.1+    181028 807  0.1+  0.1-
    180930 691  0.1-  0.2-    181004 H21  0.3+  0.2+    181028 807  0.1-  0.1-
    180930 I52  0.2+  0.1-    181004 H21  0.1+  0.1+    181203 807  0.5+  0.3+
    180930 I52  0.5+  0.2-    181004 H21  0.3+  0.0     181203 807  0.3-  0.2-
    180930 I52  0.5+  0.1-    181006 G96  0.3-  0.0     181203 807  0.5-  0.3+
    181001 J95  0.6-  0.1+    181006 G96  0.3+  0.1+    200919 J04  0.1+  0.3+
    181001 J95  0.2+  0.3+    181006 G96  0.0   0.4-    200919 J04  0.0   0.2+
    181001 H21  0.2-  0.1+    181009 H21  0.0   0.2-    200919 J04  0.3-  0.3+
    181001 H21  0.0   0.3-    181009 H21  0.2+  0.1-    200920 J04  0.2+  0.1-
    181001 H21  0.2-  0.2-    181014 474  0.3-  0.6-    200920 J04  0.2+  0.2+
    181002 K51  0.1-  0.5+    181014 474  0.0   0.2-    200920 J04  0.1+  0.1+
    181002 K51  0.6+  0.6-    181014 474  0.1+  0.2-
    
    Ephemeris:
    2018 SQ3                 a,e,i = 1.57, 0.26, 26                  q = 1.1639
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 08 21    00 52 21.2 +41 11 33   0.4538  1.2642   113.7    47.1    23.0
    ...
    2020 09 05    01 40 07.4 +35 25 22   0.3378  1.2244   122.8    43.8    22.2
    ...
    2020 09 13    02 07 27.6 +28 33 31   0.2847  1.2066   129.2    40.2    21.7
    ...
    2020 09 19    02 28 02.0 +20 53 37   0.2522  1.1951   134.5    36.8    21.3
    2020 09 20    02 31 25.4 +19 22 56   0.2476  1.1933   135.4    36.2    21.2
    2020 09 21    02 34 47.7 +17 48 13   0.2433  1.1916   136.2    35.7    21.2
    ...
    2020 09 27    02 54 29.8 +07 02 59   0.2238  1.1823   139.9    33.1    20.9
    ...
    2020 10 05    03 18 34.8 -09 17 21   0.2174  1.1727   139.0    34.0    20.8
    ...
    2020 10 20    03 53 06.1 -34 53 55   0.2602  1.1641   124.8    44.6    21.5
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-S117
    


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