• MPC Preparation (Info)

  • MPEC 2021-H35 : 2021 HD

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    M.P.E.C. 2021-H35                                Issued 2021 April 17, 16:41 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 HD                                 
    
    
    Observations:
         K21H00D* C2021 04 16.31923811 43 44.950-20 22 30.28         20.48wUEH035F51
         K21H00D  C2021 04 16.33045011 43 31.649-20 18 37.00         20.55wUEH035F51
         K21H00D  C2021 04 16.35288111 43 04.940-20 10 47.91         20.59wUEH035F51
         K21H00D KC2021 04 16.54577711 39 23.08 -18 57 01.2          19.9 GVEH035474
         K21H00D KC2021 04 16.54841511 39 20.01 -18 56 01.9          19.2 GVEH035474
         K21H00D KC2021 04 16.54972411 39 18.38 -18 55 33.3          20.4 GVEH035474
         K21H00D KC2021 04 16.55103411 39 16.83 -18 55 03.8          20.1 GVEH035474
         K21H00D KC2021 04 16.85036311 33 42.61 -17 05 35.1          20.3 GVEH035I93
         K21H00D KC2021 04 16.86436111 33 24.98 -17 00 00.5          19.9 GVEH035I93
         K21H00D KC2021 04 17.14617511 27 44.62 -15 02 26.1          20.07GVEH035I52
         K21H00D KC2021 04 17.14807011 27 42.10 -15 01 37.0                VEH035I52
         K21H00D KC2021 04 17.14996311 27 39.57 -15 00 48.4          20.39GVEH035I52
         K21H00D KC2021 04 17.32411511 24 01.54 -13 38 41.2          20.3 GVEH035474
         K21H00D KC2021 04 17.32488811 24 00.53 -13 38 20.1          20.1 GVEH035474
         K21H00D KC2021 04 17.32566111 23 59.53 -13 37 59.4          20.1 GVEH035474
         K21H00D KC2021 04 17.32643411 23 58.44 -13 37 38.2          19.8 GVEH035474
    
    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, 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.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer H. Groeller.  Measurers
        E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
        H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D.
        Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m reflector +
        CCD.
    I93 St Pardon de Conques.  Observers F. Losse, W. D'Anna.  Measurer F. Losse.
        0.40-m f/3.7 reflector + CCD.
    
    Orbital elements:
    2021 HD                                                  Earth MOID = 0.0083 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
    M 126.71135              (2000.0)            P               Q                  
    n   1.12989889     Peri.  127.79436     +0.90362678     +0.41239216             
    a   0.9129416      Node   208.40012     -0.42763942     +0.88387094             
    e   0.3275382      Incl.   14.08154     +0.02414887     +0.22069181             
    P   0.87           H   26.27          G   0.15           U   6                  
    Residuals in seconds of arc
    210416 F51  0.0   0.1-    210416 474  0.2-  0.2-    210417 474  0.4-  0.3-
    210416 F51  0.0   0.2+    210416 I93  0.6-  0.3-    210417 474  0.0   0.0
    210416 F51  0.1+  0.1-    210416 I93  0.1-  0.3+    210417 474  0.6+  0.0
    210416 474  0.5-  0.1+    210417 I52  0.0   0.3-    210417 474  0.1-  0.4+
    210416 474  0.7+  0.2+    210417 I52  0.1+  0.2+
    210416 474  0.4-  0.4-    210417 I52  0.0   0.1+
    
    Ephemeris:
    2021 HD                  a,e,i = 0.91, 0.33, 14                  q = 0.6139
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 03 18    13 50 45.2 -44 20 11   0.2292  1.1486   127.3    43.6    25.1
    ...
    2021 04 02    13 32 18.8 -43 38 59   0.1252  1.0981   139.8    36.0    23.4
    ...
    2021 04 10    12 56 34.6 -38 31 05   0.07319 1.0653   149.1    28.9    22.0
    ...
    2021 04 16    11 49 20.7 -22 06 33   0.03906 1.0381   151.7    27.3    20.5
    2021 04 17    11 30 39.1 -16 01 27   0.03461 1.0333   148.1    30.9    20.4
    2021 04 18    11 08 39.2 -08 11 41   0.03093 1.0285   141.7    37.2    20.3
    ...
    2021 04 24    07 47 13.1 +47 03 15   0.03602 0.9985    77.5   100.5    22.7
    ...
    2021 05 02    04 42 55.5 +56 26 45   0.08040 0.9554    47.6   128.8    26.3
    ...
    2021 05 17    03 22 07.2 +52 21 33   0.1788  0.8672    33.2   140.3    29.1
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-H35
    


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