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  • MPEC 2024-C164 : 2021 CM7

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    M.P.E.C. 2024-C164                            Issued 2024 February 14, 13:30 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 CM7                                 
    
    
                               Revision to MPEC 2021-C284                           
    
    Additional Observations:
         K21C07M  C2024 01 20.50853209 54 08.149+04 29 59.81         22.25GVEC164F52
         K21C07M  C2024 01 20.53360809 54 05.205+04 30 00.24         23.13GVEC164F52
         K21C07M  C2024 01 20.54610009 54 03.718+04 30 00.07         23.12GVEC164F52
         K21C07M  C2024 02 05.41670809 05 52.574+05 14 25.49         21.23GVEC164F52
         K21C07M  C2024 02 05.42787309 05 49.549+05 14 29.49         21.19GVEC164F52
         K21C07M  C2024 02 05.43905709 05 46.486+05 14 33.30         20.57GVEC164F52
         K21C07M  C2024 02 05.45024409 05 43.436+05 14 36.80         19.80GVEC164F52
         K21C07M  C2024 02 14.33349808 16 54.965+06 22 13.11         20.89wXEC164F51
         K21C07M  C2024 02 14.34669408 16 49.674+06 22 20.37         20.97wXEC164F51
         K21C07M  C2024 02 14.35986808 16 44.382+06 22 27.67         21.05wXEC164F51
         K21C07M  C2024 02 14.37310008 16 39.056+06 22 34.97         20.89wXEC164F51
    
    Observer details:
    F51 Pan-STARRS 1, Haleakala.  Observers J. Herman, T. Lowe, P. Minguez, A.
        Schultz, I. Smith.  Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
        Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
        Weryk.  1.8-m Ritchey-Chretien + CCD.
    F52 Pan-STARRS 2, Haleakala.  Observers J. Herman, T. Lowe, P. Minguez, A.
        Schultz, I. Smith.  Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
        Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
        Weryk.  1.8-m Ritchey-Chretien + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    240120 F52 0.30+ 0.16+    240214 F51 0.14+ 0.26+    E2023-XR9   +0.55 days
    
    Orbital elements:
    2021 CM7                                                 Earth MOID = 0.0761 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 288.12475              (2000.0)            P               Q                  
    n   0.33105752     Peri.    4.55182     +0.30574179     +0.94366415             
    a   2.0695079      Node   283.29046     -0.87760211     +0.22775981             
    e   0.9258072      Incl.    7.47266     -0.36923771     +0.24004881             
    P   2.98           H   21.10          G   0.15           U   0                  
    Residuals in seconds of arc
    210206 G96 (0.8-  0.4-)   210213 033  0.3-  0.7-    240120 F52  0.2+  0.0
    210206 G96  0.4+  0.3-    210213 033  0.3-  0.1-    240120 F52  0.2+  0.2+
    210211 F51  0.1+  0.1+    210213 033  0.4-  0.3-    240120 F52  0.1-  0.1-
    210211 F51  0.1+  0.2+    210219 807  0.0   0.1+    240205 F52  0.4-  0.1+
    210211 F51  0.2+  0.0     210219 807  0.1+  0.1+    240205 F52  0.0   0.1+
    210211 F51  0.0   0.1+    210219 807  0.1+  0.0     240205 F52  0.0   0.0
    210212 568  0.0   0.0     210219 V06  0.0   0.2+    240205 F52  0.2+  0.4-
    210212 568  0.0   0.0     210219 V06  0.2+  0.4+    240214 F51  0.1+  0.0
    210212 568  0.0   0.0     210219 V06  0.1+  0.1-    240214 F51  0.1+  0.0
    210213 807  0.1+  0.0     210308 807  0.1+  0.1+    240214 F51  0.1+  0.0
    210213 807  0.1-  0.4-    210308 807 (0.0   1.1+)   240214 F51  0.0   0.1+
    210213 807 (0.4-  1.1-)   210308 807  0.1-  0.2-
    
    Ephemeris:
    2021 CM7                 a,e,i = 2.07, 0.93, 7                   q = 0.1535
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2024 01 15    10 02 57.8 +04 32 49   0.9754  1.8537   142.3    19.0    23.4
    ...
    2024 01 30    09 30 20.6 +04 45 32   0.6936  1.6608   163.0    10.0    22.1
    ...
    2024 02 07    08 58 32.7 +05 24 14   0.5710  1.5500   168.6     7.2    21.4
    ...
    2024 02 13    08 25 27.4 +06 10 20   0.4967  1.4628   159.5    13.7    21.2
    2024 02 14    08 19 05.6 +06 19 15   0.4860  1.4478   157.3    15.3    21.2
    2024 02 15    08 12 29.0 +06 28 27   0.4759  1.4328   154.9    17.0    21.2
    ...
    2024 02 21    07 27 59.1 +07 26 40   0.4270  1.3402   138.9    29.0    21.2
    ...
    2024 02 29    06 19 29.7 +08 34 49   0.3952  1.2094   114.5    48.2    21.3
    ...
    2024 03 15    04 16 07.6 +09 00 36   0.4243  0.9358    69.7    85.2    22.1
    
    A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-C164
    


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