• MPC Preparation (Info)

  • MPEC 2021-T46 : 2021 SK4

    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-T45 Read MPEC 2021-T47


    M.P.E.C. 2021-T46                               Issued 2021 October 4, 05:12 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 SK4                                 
    
    
    Observations:
         K21S04K* C2021 09 28.41404123 54 37.638-12 18 23.12         21.63wUET046F51
         K21S04K  C2021 09 28.42516123 54 36.580-12 17 47.51         21.87wUET046F51
         K21S04K  C2021 09 28.43627423 54 35.504-12 17 12.00         22.09wUET046F51
         K21S04K  C2021 09 28.50277823 54 29.111-12 13 35.44         21.89GVET046F51
         K21S04K  C2021 09 28.50359623 54 29.033-12 13 32.59         21.59GVET046F51
         K21S04K  C2021 09 30.37242023 52 26.313-10 29 11.82         21.98wUET046F51
         K21S04K  C2021 09 30.38821923 52 24.738-10 28 17.17         21.92wUET046F51
         K21S04K KC2021 10 01.47977023 51 10.28 -09 22 19.6          21.5 GVET046474
         K21S04K KC2021 10 01.48212923 51 10.01 -09 22 11.1          21.5 GVET046474
         K21S04K KC2021 10 01.48448823 51 09.73 -09 22 02.5          21.7 GVET046474
    
    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.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, I.
        Smith, K. Chambers.  Measurers K. Chambers, S. Chastel, 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.
    
    Orbital elements:
    2021 SK4                                                 Earth MOID = 0.0879 AU
    Epoch 2021 July 5.0 TT = JDT 2459400.5                  Bell                    
    M 286.27200              (2000.0)            P               Q                  
    n   0.60203614     Peri.   26.24890     +0.77316457     -0.63361087             
    a   1.3890600      Node    13.17843     +0.55863037     +0.65989694             
    e   0.2261308      Incl.    6.91675     +0.30024765     +0.40382333             
    P   1.64           H   25.62          G   0.15           U   9                  
    Residuals in seconds of arc
    210928 F51  0.4-  0.3+    210928 F51  0.2-  0.2-    211001 474  0.2-  0.1-
    210928 F51  0.1+  0.1+    210930 F51  0.1+  0.1+    211001 474  1.1-  0.1-
    210928 F51  0.2+  0.3-    210930 F51  0.0   0.0
    210928 F51  0.2-  0.3-    211001 474  0.6+  0.1-
    
    Ephemeris:
    2021 SK4                 a,e,i = 1.39, 0.23, 7                   q = 1.0750
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 09 04    00 12 02.4 -24 28 45   0.1791  1.1724   154.2    22.0    23.3
    ...
    2021 09 19    00 04 10.6 -19 06 20   0.1346  1.1333   161.9    16.0    22.4
    ...
    2021 09 27    23 56 11.9 -13 31 18   0.1173  1.1158   164.3    14.0    22.0
    ...
    2021 10 03    23 49 26.7 -07 49 01   0.1077  1.1044   163.6    14.8    21.8
    2021 10 04    23 48 19.3 -06 44 29   0.1064  1.1027   163.2    15.2    21.8
    2021 10 05    23 47 12.8 -05 37 57   0.1052  1.1010   162.7    15.7    21.8
    ...
    2021 10 11    23 41 08.0 +01 37 56   0.09986 1.0919   158.5    19.6    21.8
    ...
    2021 10 19    23 35 50.2 +12 17 17   0.09801 1.0827   150.8    26.7    22.0
    ...
    2021 11 03    23 39 19.7 +30 42 47   0.1089  1.0749   137.5    38.6    22.5
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-T46
    


    Read MPEC 2021-T45 Read MPEC 2021-T47


    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)