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  • MPEC 2024-B21 : 2021 CZ2

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    M.P.E.C. 2024-B21                              Issued 2024 January 17, 14:12 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets, routine data on comets and natural satellites,
             and occasional editorial announcements.  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 CZ2                                 
    
    
                               Revision to MPEC 2021-C122                           
    
    Additional Observations:
         K21C02Z 1C2024 01 13.53844 15 18 28.02 -01 24 12.6          19.8 GVEB021703
         K21C02Z 1C2024 01 13.54529 15 18 15.85 -01 25 44.0                VEB021703
         K21C02Z 1C2024 01 15.51137 13 52 42.98 -11 56 47.9          17.4 GVEB021703
         K21C02Z 1C2024 01 15.51600 13 52 24.52 -11 58 50.3          17.6 GVEB021703
         K21C02Z 1C2024 01 15.51833 13 52 15.13 -11 59 51.5          17.6 GVEB021703
         K21C02Z  C2024 01 15.61730913 45 47.083-12 42 39.17         17.43oVEB021T05
         K21C02Z  C2024 01 15.62047313 45 33.965-12 44 04.38         17.58oVEB021T05
         K21C02Z  C2024 01 15.62606013 45 10.469-12 46 36.37         17.46oVEB021T05
         K21C02Z  C2024 01 15.64995813 43 29.302-12 57 25.99         17.30oVEB021T05
         K21C02Z 1C2024 01 16.51980912 33 20.110-19 45 36.90               VEB021G96
         K21C02Z 1C2024 01 16.52497412 32 50.680-19 47 57.84               VEB021G96
         K21C02Z 1C2024 01 16.53016012 32 21.116-19 50 18.92         16.65GVEB021G96
         K21C02Z 1C2024 01 16.55876312 29 37.414-20 03 10.94         16.57GVEB021G96
         K21C02Z 1C2024 01 16.55886512 29 36.827-20 03 13.46         16.69GVEB021G96
         K21C02Z 1C2024 01 16.55897012 29 36.236-20 03 16.24         16.67GVEB021G96
         K21C02Z 1C2024 01 16.55907312 29 35.635-20 03 19.04         16.71GVEB021G96
    
    Observer details:
    703 Catalina Sky Survey.  Observers V. F. Carvajal, A. R. Gibbs, T. Beuden.
        Measurers B. Gray, D. Rankin, F. C. Shelly.  0.68-m Schmidt + 10K CCD.
    G96 Mt. Lemmon Survey.  Observer J. K. Hogan.  Measurers T. Beuden, V. F.
        Carvajal, D. Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H.
        Groeller, J. K. Hogan, 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.
    T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, R. Siverd, J. Tonry, H.
        Weiland.  Measurers L. Denneau, N. Erasmus, A. Fitzsimmons, A. Lawrence,
        J. Robinson, R. Siverd, J. Tonry, H. Weiland.  0.5-m 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
    240113 703 1.51- 0.53-    240116 G96 0.56- 0.06-    MPO606152   +0.08 days
    
    Orbital elements:
    2021 CZ2                                                 Earth MOID = 0.0024 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 292.50228              (2000.0)            P               Q                  
    n   1.32408492     Peri.   42.22408     +0.89015061     +0.33237114             
    a   0.8213448      Node   295.83699     -0.45199709     +0.73070113             
    e   0.4126698      Incl.   20.26281     +0.05771068     +0.59632649             
    P   0.74           H   22.53          G   0.15           U   2                  
    Residuals in seconds of arc
    210207 G96  0.4-  0.5+    210209 V06  0.1-  0.1+    240113 703  0.7-  0.6-
    210207 G96  0.2-  0.6+    210211 807  0.1+  0.1-    240115 703  0.2-  0.1+
    210207 G96  0.0   0.2+    210211 807  0.0   0.0     240115 703  1.0+  0.0
    210207 G96  0.4-  0.0     210211 807  0.2-  0.0     240115 703  0.4+  0.3+
    210207 V06  0.2+  0.3-    210212 291  0.0   0.5-    240115 T05  0.7-  0.1+
    210207 V06  0.1-  0.1+    210212 291  0.1+  0.0     240115 T05 (1.3+  0.6+)
    210207 V06  0.3-  0.6+    210212 291  0.3+  0.1+    240115 T05  0.8+  0.2+
    210208 807  0.3+  0.0     210220 807  0.4+  0.1+    240115 T05  0.1-  0.2-
    210208 807  0.2+  0.5-    210220 807 (0.3+  0.9+)   240116 G96  0.1-  0.2+
    210208 807  0.4-  0.3-    210220 807 (0.2+  1.2+)   240116 G96  0.3-  0.0
    210208 V06  0.0   0.1+    210224 695  0.1-  0.1-    240116 G96  0.0   0.0
    210208 V06  0.0   0.0     210224 695  0.2-  0.0     240116 G96  0.0   0.0
    210208 V06  0.0   0.1-    210224 695  0.0   0.1-    240116 G96  0.0   0.2+
    210208 V06  0.0   0.2-    210309 807  0.1+  0.2-    240116 G96  0.1+  0.2+
    210209 V06  0.3-  0.1-    210309 807  0.4+  0.3-    240116 G96  0.0   0.2+
    210209 V06  0.0   0.2-    210309 807  0.2+  0.1-
    210209 V06  0.1-  0.1+    240113 703 (1.3+  1.8+)
    
    Ephemeris:
    2021 CZ2                 a,e,i = 0.82, 0.41, 20                  q = 0.4824
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 12 18    17 19 07.9 +08 44 21   0.2558  0.7805    32.5   137.3    25.5
    ...
    2024 01 02    16 54 38.9 +09 46 22   0.1258  0.8950    42.7   131.8    23.7
    ...
    2024 01 10    16 15 55.3 +05 53 04   0.06109 0.9483    53.4   123.6    21.5
    ...
    2024 01 16    13 17 48.4 -15 35 30   0.02156 0.9843    91.2    87.6    17.2
    2024 01 17    11 47 07.7 -23 00 13   0.01999 0.9900   107.8    71.1    16.5
    2024 01 18    10 09 24.7 -26 53 41   0.02171 0.9956   122.5    56.5    16.2
    ...
    2024 01 24    06 39 44.6 -20 34 59   0.06165 1.0272   132.8    44.7    18.2
    ...
    2024 02 01    06 02 40.5 -16 43 31   0.1267  1.0639   125.6    48.9    20.0
    ...
    2024 02 16    05 53 51.6 -13 37 01   0.2512  1.1166   114.8    53.4    21.7
    
    A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-B21
    


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