• MPC Preparation (Info)

  • MPEC 2021-X12 : 2021 WZ4

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    M.P.E.C. 2021-X12                              Issued 2021 December 1, 12:58 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
    
                                    2021 WZ4                                 
    
    
    Observations:
         K21W04Z* C2021 11 29.26337803 58 01.07 +19 45 34.1          21.11GVEX012G96
         K21W04Z  C2021 11 29.26852403 58 00.38 +19 45 34.1          20.83GVEX012G96
         K21W04Z  C2021 11 29.27365203 57 59.72 +19 45 34.1          21.14GVEX012G96
         K21W04Z  C2021 11 29.27877203 57 59.01 +19 45 34.1                VEX012G96
         K21W04Z mC2021 11 29.40823703 57 42.23 +19 45 28.3          20.87GVEX012I52
         K21W04Z mC2021 11 29.41164003 57 41.77 +19 45 27.3          21.03GVEX012I52
         K21W04Z mC2021 11 29.41459203 57 41.40 +19 45 26.8                VEX012I52
         K21W04Z mC2021 11 29.41785703 57 41.00 +19 45 26.9          21.21GVEX012I52
         K21W04Z KC2021 11 30.14917603 56 23.58 +19 45 21.5          20.8 VuEX012H21
         K21W04Z KC2021 11 30.15556703 56 24.25 +19 45 25.5          20.45GVEX012I52
         K21W04Z KC2021 11 30.15616603 56 22.54 +19 45 21.5          20.8 VuEX012H21
         K21W04Z KC2021 11 30.15878503 56 23.77 +19 45 26.1          20.61GVEX012I52
         K21W04Z KC2021 11 30.16287603 56 21.60 +19 45 22.4          21.0 VuEX012H21
         K21W04Z KC2021 11 30.16522003 56 22.91 +19 45 26.6          20.74GVEX012I52
         K21W04Z  C2021 11 30.26989703 56 07.79 +19 45 31.6          20.97GVEX012G96
         K21W04Z  C2021 11 30.28259103 56 05.90 +19 45 31.8          21.03GVEX012G96
         K21W04Z  C2021 11 30.28815203 56 05.09 +19 45 31.5          21.18GVEX012G96
         K21W04Z  C2021 11 30.29370703 56 04.26 +19 45 31.2          20.70GVEX012G96
         K21W04Z KC2021 12 01.14799003 54 17.40 +19 45 17.3          20.8 VuEX012H21
         K21W04Z KC2021 12 01.15432903 54 16.38 +19 45 17.6          20.8 VuEX012H21
         K21W04Z KC2021 12 01.15861703 54 15.68 +19 45 17.8          20.6 VuEX012H21
         K21W04Z KC2021 12 01.24239 03 54 04.64 +19 45 20.0          19.5 RVEX012G58
         K21W04Z KC2021 12 01.24947 03 54 03.50 +19 45 18.5          19.7 RVEX012G58
         K21W04Z KC2021 12 01.25830 03 54 02.07 +19 45 19.1          19.8 RVEX012G58
         K21W04Z KC2021 12 01.26727 03 54 00.57 +19 45 21.8          19.8 RVEX012G58
    
    Observer details:
    G58 Chabot Space and Science Center, Oakland.  Observer G. McKeegan.  0.9-m
        f/4.5 Cassegrain + CCD.
    G96 Mt. Lemmon Survey.  Observers G. J. Leonard, A. R. Gibbs.  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, D. Rankin, R. L.
        Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observers K. W. Wierzchos, 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, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.
    
    Orbital elements:
    2021 WZ4                                                 Earth MOID = 0.0028 AU
    Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
    M 358.72759              (2000.0)            P               Q                  
    n   0.36744403     Peri.   72.97137     -0.81229297     -0.58305666             
    a   1.9305242      Node    71.36035     +0.52891911     -0.74722348             
    e   0.5937606      Incl.    0.90717     +0.24581437     -0.31890750             
    P   2.68           H   24.89          G   0.15           U   8                  
    Residuals in seconds of arc
    211129 G96  0.0   0.1+    211130 I52  0.2+  0.2-    211201 H21  0.0   0.2-
    211129 G96  0.1-  0.0     211130 H21  0.1-  0.3-    211201 H21  0.0   0.2-
    211129 G96  0.1+  0.0     211130 I52  0.2-  0.1+    211201 H21  0.2-  0.2-
    211129 G96  0.4-  0.1-    211130 H21  0.1+  0.3+    211201 G58  0.3+  0.8+
    211129 I52  0.5+  0.4+    211130 I52  0.2+  0.0     211201 G58  0.5+  1.0-
    211129 I52  0.0   0.2-    211130 G96  0.1-  0.2+    211201 G58  0.7+  0.8-
    211129 I52  0.1-  0.5-    211130 G96  0.2-  0.3+    211201 G58  0.4+  1.7+
    211129 I52  0.1+  0.0     211130 G96  0.0   0.1+
    211130 H21  0.7+  0.0     211130 G96  0.1-  0.1-
    
    Ephemeris:
    2021 WZ4                 a,e,i = 1.93, 0.59, 1                   q = 0.7843
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 11 01    04 10 15.9 +19 41 19   0.4060  1.3695   154.2    18.4    24.6
    ...
    2021 11 16    04 09 51.6 +19 46 04   0.2476  1.2331   169.3     8.6    22.9
    ...
    2021 11 24    04 04 51.8 +19 45 59   0.1730  1.1603   178.2     1.5    21.6
    ...
    2021 11 30    03 56 39.4 +19 45 48   0.1207  1.1063   173.4     5.8    21.0
    2021 12 01    03 54 35.6 +19 45 46   0.1123  1.0974   172.0     7.2    20.9
    2021 12 02    03 52 13.2 +19 45 43   0.1039  1.0886   170.4     8.7    20.7
    ...
    2021 12 08    03 24 19.3 +19 40 33   0.05498 1.0363   157.9    21.0    19.7
    ...
    2021 12 16    19 37 41.8 -10 20 39   0.01702 0.9698    32.3   147.2    23.9
    ...
    2021 12 31    16 46 10.5 -19 17 08   0.1370  0.8633    26.8   149.1    28.5
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X12
    


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