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  • MPEC 2020-S175 : 2020 SD4

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    M.P.E.C. 2020-S175                           Issued 2020 September 24, 06:39 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
    
                                    2020 SD4                                 
    
    
    Observations:
         K20S04D  C2020 09 21.42558300 09 15.046-06 40 06.23         21.26GVES175F52
         K20S04D  C2020 09 21.43778700 09 13.581-06 38 30.91         21.17GVES175F52
         K20S04D  C2020 09 21.45000600 09 12.124-06 36 54.90         21.26GVES175F52
         K20S04D  C2020 09 21.46219600 09 10.642-06 35 19.44         20.16GVES175F52
         K20S04D* C2020 09 23.32964 00 06 22.32 -02 42 09.8          21.1 GVES175G96
         K20S04D  C2020 09 23.33529 00 06 21.77 -02 41 29.4          21.1 GVES175G96
         K20S04D  C2020 09 23.34093 00 06 21.13 -02 40 49.4          20.3 GVES175G96
         K20S04D  C2020 09 23.34657 00 06 20.53 -02 40 08.8          20.8 GVES175G96
         K20S04D KC2020 09 23.42593500 06 12.27 -02 30 42.5          21.43GVES175I52
         K20S04D KC2020 09 23.42761400 06 12.12 -02 30 30.9                VES175I52
         K20S04D KC2020 09 23.42929400 06 11.91 -02 30 19.2                VES175I52
         K20S04D KC2020 09 24.25159900 05 07.14 -00 55 01.7          20.65GVES175I52
         K20S04D KC2020 09 24.25327900 05 06.96 -00 54 51.1          22.53GVES175I52
         K20S04D KC2020 09 24.25495900 05 06.78 -00 54 38.8          20.98GVES175I52
    
    Observer details:
    F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
        Lowe, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y.
        Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    G96 Mt. Lemmon Survey.  Observer T. A. Pruyne.  Measurers E. J. Christensen,
        G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
        Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L.
        Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  Measurers
        E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
        H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D.
        Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m reflector +
        CCD.
    
    Orbital elements:
    2020 SD4                                                 Earth MOID = 0.1158 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
    M  41.00437              (2000.0)            P               Q                  
    n   0.34243870     Peri.  322.46194     +0.81273332     +0.58257386             
    a   2.0233957      Node     1.96605     -0.45625884     +0.64545177             
    e   0.4684340      Incl.   14.34466     -0.36234295     +0.49396327             
    P   2.88           H   25.01          G   0.15           U   9                  
    Residuals in seconds of arc
    200921 F52  0.2-  0.5+    200923 G96  0.4+  0.1+    200923 I52  0.2-  0.1-
    200921 F52  0.0-  0.1-    200923 G96  0.2-  0.2-    200924 I52  0.4+  0.2+
    200921 F52  0.2+  0.1-    200923 G96  0.1-  0.1+    200924 I52  0.3+  0.6-
    200921 F52  0.0+  0.3-    200923 I52  0.1+  0.5+    200924 I52  0.2+  0.3+
    200923 G96  0.5-  0.0+    200923 I52  0.4+  0.1+
    
    Ephemeris:
    2020 SD4                 a,e,i = 2.02, 0.47, 14                  q = 1.0756
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 08 25    01 40 11.4 -70 35 50   0.1510  1.0775   112.4    60.1    23.2
    ...
    2020 09 09    00 36 12.5 -39 12 33   0.1173  1.1008   141.0    35.2    22.0
    ...
    2020 09 17    00 17 06.8 -17 16 18   0.1232  1.1232   162.3    15.8    21.6
    ...
    2020 09 23    00 06 51.4 -03 21 15   0.1408  1.1440   176.2     3.3    21.4
    2020 09 24    00 05 26.7 -01 23 16   0.1447  1.1478   178.1     1.6    21.3
    2020 09 25    00 04 06.7 +00 28 28   0.1488  1.1517   179.0     0.8    21.3
    ...
    2020 10 01    23 57 40.3 +09 36 46   0.1778  1.1766   169.8     8.6    22.2
    ...
    2020 10 09    23 52 45.4 +17 27 44   0.2256  1.2138   160.4    16.0    23.1
    ...
    2020 10 24    23 53 03.0 +24 33 00   0.3363  1.2934   148.5    23.7    24.3
    
    M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-S175
    


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