• MPC Preparation (Info)

  • MPEC 2021-C179 : 2021 CP4

    The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.

    A form allowing access to any MPEC is at the bottom of this page.


    Read MPEC 2021-C178 Read MPEC 2021-C180


    M.P.E.C. 2021-C179                            Issued 2021 February 10, 09:54 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 CP4                                 
    
    
    Observations:
         K21C04P* C2021 02 07.49524812 49 58.472+14 50 39.68         21.67wUEC179F51
         K21C04P  C2021 02 07.50574012 49 54.976+14 50 53.68         21.39wUEC179F51
         K21C04P  C2021 02 07.52674812 49 47.952+14 51 21.75         21.27wUEC179F51
         K21C04P ^C2021 02 08.42497712 45 00.224+15 10 36.43         21.08GVEC179568
         K21C04P ^C2021 02 08.42602712 44 59.875+15 10 37.83         21.03GVEC179568
         K21C04P ^C2021 02 08.42700712 44 59.553+15 10 39.07         21.04GVEC179568
         K21C04P  C2021 02 08.48650112 44 40.078+15 11 55.45         20.72GVEC179F52
         K21C04P  C2021 02 08.49798012 44 36.290+15 12 10.14         20.59GVEC179F52
         K21C04P  C2021 02 08.50947912 44 32.539+15 12 24.42         21.05GVEC179F52
         K21C04P 2C2021 02 09.99897612 36 43.570+15 42 19.51         20.9 GVEC179J04
         K21C04P 2C2021 02 10.01178812 36 39.519+15 42 34.71         20.8 GVEC179J04
         K21C04P 1C2021 02 10.05885 12 36 23.69 +15 43 23.2          21.2 VVEC179033
         K21C04P 1C2021 02 10.06215 12 36 22.64 +15 43 26.7          21.6 VVEC179033
    
    Observer details:
    033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
        Hoegner, B. Stecklum.  Measurer B. Stecklum.  1.34-m f/3 Schmidt + CCD.
    568 Mauna Kea.  Observers R. Wainscoat, C. Wipper, T. Burdullis.  Measurers R.
        Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
        Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
        Fairlamb, H. Flewelling, 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. 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.
    J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers M.
        Micheli, D. Koschny, L. Conversi, R. Kresken, A. Knofel, M. Busch, E.
        Schwab.  1.0-m f/4.4 reflector + CCD.
    
    Orbital elements:
    2021 CP4                                                 Earth MOID = 0.0824 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
    M   4.52349              (2000.0)            P               Q                  
    n   0.36418715     Peri.    4.86745     +0.69389788     -0.71796207             
    a   1.9420167      Node    41.20867     +0.65779939     +0.60089965             
    e   0.6871236      Incl.    4.79777     +0.29292608     +0.35135464             
    P   2.71           H   21.93          G   0.15           U   9                  
    Residuals in seconds of arc
    210207 F51  0.0-  0.0+    210208 568  0.0-  0.0+    210208 F52  0.3+  0.2-
    210207 F51  0.0-  0.0+    210208 568  0.0-  0.0+    210208 F52  0.3+  0.2-
    210207 F51  0.0+  0.0-    210208 568  0.1-  0.0-    210209 J04  0.0+  0.1+
    210207 F51  0.0+  0.0-    210208 568  0.1-  0.0-    210210 J04  0.1+  0.1-
    210207 F51  0.0-  0.0+    210208 F52  0.1-  0.2+    210210 033  0.1-  0.4+
    210207 F51  0.0-  0.0+    210208 F52  0.1-  0.2+    210210 033  0.0-  0.0+
    210208 568  0.1+  0.0-    210208 F52  0.2-  0.2+
    210208 568  0.1+  0.0-    210208 F52  0.3-  0.2+
    
    Ephemeris:
    2021 CP4                 a,e,i = 1.94, 0.69, 5                   q = 0.6076
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 01 11    15 42 22.3 -00 52 10   0.2336  0.8863    59.1   107.9    22.6
    ...
    2021 01 26    14 02 09.4 +09 01 36   0.2559  1.0603   100.2    66.0    21.4
    ...
    2021 02 03    13 14 52.5 +13 02 00   0.2824  1.1531   120.0    47.7    21.3
    ...
    2021 02 09    12 41 56.1 +15 22 35   0.3098  1.2217   133.8    35.6    21.3
    2021 02 10    12 36 41.9 +15 42 30   0.3150  1.2330   136.0    33.8    21.3
    2021 02 11    12 31 32.7 +16 01 22   0.3205  1.2443   138.2    31.9    21.3
    ...
    2021 02 17    12 02 35.4 +17 33 16   0.3583  1.3114   150.3    21.9    21.3
    ...
    2021 02 25    11 30 07.2 +18 43 15   0.4218  1.3987   163.1    11.9    21.5
    ...
    2021 03 12    10 49 16.6 +19 00 01   0.5803  1.5554   161.8    11.5    22.4
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-C179
    


    Read MPEC 2021-C178 Read MPEC 2021-C180


    MPEC number:

    Enter an MPEC number in one of the following forms:

    • 1997-B01 (the full form)
    • J97B01 (the packed version of the full form)
    • B01 (the abbreviated form)