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  • MPEC 2020-S191 : 2020 SR4

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    M.P.E.C. 2020-S191                           Issued 2020 September 25, 04:33 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 SR4                                 
    
    
    Observations:
         K20S04R* C2020 09 24.20637323 12 15.11 -12 37 05.4          19.24GVES191G96
         K20S04R  C2020 09 24.21201523 12 16.90 -12 34 55.8          19.17GVES191G96
         K20S04R  C2020 09 24.21766023 12 18.68 -12 32 44.4          19.05GVES191G96
         K20S04R  C2020 09 24.22333223 12 20.45 -12 30 32.4          19.12GVES191G96
         K20S04R  C2020 09 24.25029323 12 27.57 -12 20 16.4          19.1 GVES191H01
         K20S04R  C2020 09 24.25742023 12 29.75 -12 17 32.2          19.0 GVES191H01
         K20S04R  C2020 09 24.26754023 12 32.84 -12 13 39.7          19.0 GVES191H01
         K20S04R  C2020 09 24.28012323 12 36.67 -12 08 51.3          19.2 GVES191H01
         K20S04R mC2020 09 24.33829523 12 55.40 -11 46 45.0          19.34GVES191I52
         K20S04R mC2020 09 24.33848423 12 55.46 -11 46 40.7          19.19GVES191I52
         K20S04R mC2020 09 24.33867223 12 55.53 -11 46 36.8          18.63GVES191I52
         K20S04R mC2020 09 24.33886023 12 55.61 -11 46 32.0          19.74GVES191I52
         K20S04R KC2020 09 24.37056823 13 27.13 -11 28 06.0          19.2 GVES191474
         K20S04R KC2020 09 24.37180523 13 27.59 -11 27 39.7          19.0 GVES191474
         K20S04R KC2020 09 24.37304323 13 28.02 -11 27 12.5          19.9 GVES191474
         K20S04R KC2020 09 24.37428023 13 28.41 -11 26 45.2          19.7 GVES191474
         K20S04R KC2020 09 24.84349423 16 21.25 -08 54 10.8          19.3 GVES191J95
         K20S04R KC2020 09 24.84885523 16 22.77 -08 52 30.4          19.4 GVES191J95
         K20S04R KC2020 09 24.85599523 16 24.78 -08 50 16.3          19.4 GVES191J95
         K20S04R KC2020 09 24.86148623 16 26.29 -08 48 33.2          19.1 GVES191J95
         K20S04R KC2020 09 24.90870923 16 38.79 -08 33 26.2          19.5 GVES191B49
         K20S04R KC2020 09 24.91017423 16 39.14 -08 32 58.4          19.8 GVES191B49
         K20S04R KC2020 09 25.12059 23 17 52.43 -07 29 43.3          19.3 RqES191734
         K20S04R KC2020 09 25.12596 23 17 53.63 -07 28 10.7          19.3 RqES191734
         K20S04R mC2020 09 25.12990923 17 58.33 -07 26 34.3          19.32GVES191I52
         K20S04R mC2020 09 25.13015623 17 58.39 -07 26 30.4          19.57GVES191I52
         K20S04R mC2020 09 25.13064923 17 58.55 -07 26 22.1          19.24GVES191I52
         K20S04R KC2020 09 25.13140 23 17 54.88 -07 26 36.2          18.9 RqES191734
         K20S04R KC2020 09 25.13171423 17 53.10 -07 26 36.6          19.6 VuES191H21
         K20S04R KC2020 09 25.13462823 17 53.75 -07 25 46.4          19.8 VuES191H21
         K20S04R KC2020 09 25.13677 23 17 56.19 -07 25 04.7          19.1 RqES191734
         K20S04R KC2020 09 25.13754423 17 54.42 -07 24 56.3          20.0 VuES191H21
    
    Observer details:
    474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M.
        Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
    734 Farpoint Observatory, Eskridge.  Observers G. Hug, D. Cromer, D. Goodin,
        R. Valentine.  Measurer D. Cromer.  0.7-m reflector + CCD.
    B49 Paus Observatory, Sabadell.  Observer J. Camarasa.  0.30-m f/4 reflector +
        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.
    H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
        Measurer W. H. Ryan.  2.4-m f/8.9 Ritchey-Chretien + CCD.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.76-m f/3.0
        astrograph + 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.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.41-m f/6.3 Schmidt-Cassegrain
        + CCD.
    
    Orbital elements:
    2020 SR4                                                 Earth MOID = 0.0115 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
    M 102.50863              (2000.0)            P               Q                  
    n   0.71921833     Peri.  285.29374     +0.30563980     +0.95213552             
    a   1.2337549      Node     2.51768     -0.82717482     +0.26797471             
    e   0.3043110      Incl.    6.16650     -0.47155713     +0.14706295             
    P   1.37           H   26.36          G   0.15           U   7                  
    Residuals in seconds of arc
    200924 G96  0.1-  0.8+    200924 I52  0.5+  0.6+    200925 734  1.0+  0.6+
    200924 G96  0.1-  0.7-    200924 474  0.2-  0.4+    200925 734  0.0+  0.5+
    200924 G96  0.0-  0.4-    200924 474  0.6+  0.4-    200925 I52  0.5-  0.1-
    200924 G96  0.1-  0.1+    200924 474  1.0+  0.3-    200925 I52  0.5-  0.4-
    200924 H01  0.2+  0.1-    200924 474  0.8+  0.0-    200925 I52  0.1+  0.6-
    200924 H01  0.1+  0.0+    200924 J95  0.3-  1.2+    200925 734  0.2-  1.3+
    200924 H01  0.1+  0.0+    200924 J95  0.2-  0.7+    200925 H21  0.0-  0.5-
    200924 H01  0.0+  0.1+    200924 J95  0.1+  0.6+    200925 H21  0.1-  0.5-
    200924 I52  0.0-  0.3+    200924 J95  0.0-  0.7+    200925 734  0.9+  0.4+
    200924 I52  0.0+  0.4+    200924 B49  1.2-  1.3-    200925 H21  0.1+  0.6-
    200924 I52  0.2+  0.0+    200924 B49  1.3-  0.6-
    
    Ephemeris:
    2020 SR4                 a,e,i = 1.23, 0.30, 6                   q = 0.8583
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 08 26    11 50 42.8 -23 53 24   0.1422  0.9079    40.9   133.2    28.0
    ...
    2020 09 10    12 06 29.8 -34 24 57   0.05788 0.9642    41.3   136.5    26.5
    ...
    2020 09 18    13 58 08.1 -67 09 47   0.01924 0.9994    73.0   105.9    21.7
    ...
    2020 09 24    23 10 35.2 -13 56 47   0.02562 1.0274   160.4    19.1    19.4
    2020 09 25    23 17 04.6 -08 02 09   0.03027 1.0321   164.6    15.0    19.7
    2020 09 26    23 21 42.9 -03 43 30   0.03519 1.0369   166.7    12.9    19.9
    ...
    2020 10 02    23 34 54.3 +08 03 27   0.06719 1.0659   164.9    14.2    21.4
    ...
    2020 10 10    23 42 05.1 +12 48 14   0.1132  1.1052   159.3    18.6    22.8
    ...
    2020 10 25    23 52 46.1 +15 19 59   0.2092  1.1792   149.4    25.5    24.5
    
    M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-S191
    


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