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  • MPEC 2021-T144 : 2021 TB4

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    M.P.E.C. 2021-T144                              Issued 2021 October 7, 01:50 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 TB4                                 
    
    
    Observations:
         K21T04B* C2021 10 03.55537203 01 04.806+02 51 12.35         20.91wUET144F51
         K21T04B  C2021 10 03.57916903 00 41.800+02 48 04.09         20.43wUET144F51
         K21T04B  C2021 10 03.59102903 00 30.345+02 46 30.01         20.72wUET144F51
         K21T04B  C2021 10 04.56263502 47 08.676+00 51 59.71         21.23wUET144F51
         K21T04B  C2021 10 04.56834102 47 04.303+00 51 24.11         21.10wUET144F51
         K21T04B  C2021 10 04.57401202 46 59.825+00 50 47.76         20.91wUET144F51
         K21T04B |C2021 10 05.22449 02 39 34.11 -00 11 43.6          20.6 VuET144807
         K21T04B |C2021 10 05.23064 02 39 29.90 -00 12 17.5          20.7 VuET144807
         K21T04B |C2021 10 05.23691 02 39 25.67 -00 12 52.5          20.7 VuET144807
         K21T04B  C2021 10 06.59453902 26 32.030-02 02 24.24         20.68GVET144F51
         K21T04B  C2021 10 06.60712002 26 25.445-02 03 16.38         20.69GVET144F51
         K21T04B KC2021 10 06.94962 02 23 46.28 -02 26 38.8          20.4 GXET144I93
         K21T04B KC2021 10 06.96259 02 23 39.93 -02 27 28.6          19.6 GXET144I93
         K21T04B KC2021 10 06.97575 02 23 33.52 -02 28 20.2          20.6 GXET144I93
    
    Observer details:
    807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
        Horn.  0.61-m f/6.5 astrograph + 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.
    I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
    
    Orbital elements:
    2021 TB4                                                 Earth MOID = 0.0017 AU
    Epoch 2021 July 5.0 TT = JDT 2459400.5                  Veres                   
    M 345.39312              (2000.0)            P               Q                  
    n   0.39444774     Peri.   97.63628     +0.25790214     +0.96585767             
    a   1.8413785      Node   187.44790     -0.94431349     +0.24659946             
    e   0.6375442      Incl.   10.94247     -0.20434901     +0.07942079             
    P   2.50           H   24.62          G   0.15           U   8                  
    Residuals in seconds of arc
    211003 F51  0.3-  0.0     211004 F51  0.1+  0.0     211006 F51  0.0   0.1-
    211003 F51 (0.6+  0.4+)   211005 807  0.0   0.4+    211006 I93  0.6+  0.2-
    211003 F51  0.2+  0.0     211005 807  0.4-  0.3+    211006 I93  0.2+  0.3+
    211004 F51  0.1-  0.0     211005 807  0.1+  0.3-    211006 I93  0.2+  0.3-
    211004 F51 (1.1+  0.5+)   211006 F51  0.1+  0.1-
    
    Ephemeris:
    2021 TB4                 a,e,i = 1.84, 0.64, 11                  q = 0.6674
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 09 07    12 22 52.7 +16 50 55   0.2299  0.8002    22.4   151.3    29.6
    ...
    2021 09 22    10 45 44.6 +26 27 38   0.07181 0.9430    31.0   146.7    26.6
    ...
    2021 09 30    04 30 33.7 +14 53 33   0.04875 1.0255   118.3    59.3    20.2
    ...
    2021 10 06    02 31 48.3 -01 18 04   0.09833 1.0884   153.0    24.7    20.9
    2021 10 07    02 23 20.7 -02 28 51   0.1081  1.0989   155.5    22.2    21.1
    2021 10 08    02 16 14.3 -03 27 19   0.1182  1.1093   157.5    20.2    21.2
    ...
    2021 10 14    01 49 52.6 -06 48 18   0.1814  1.1721   162.9    14.5    22.1
    ...
    2021 10 22    01 33 50.5 -08 20 08   0.2721  1.2550   160.5    15.4    23.1
    ...
    2021 11 06    01 23 17.9 -08 17 20   0.4613  1.4059   148.6    21.5    24.7
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-T144
    


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