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  • MPEC 2021-D46 : 2021 DY

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    M.P.E.C. 2021-D46                             Issued 2021 February 19, 10:07 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 DY                                 
    
    
    Observations:
         K21D00Y* C2021 02 17.31725509 29 25.67 +32 23 56.2          21.35GVED046G96
         K21D00Y  C2021 02 17.32349209 29 26.64 +32 23 32.0          21.24GVED046G96
         K21D00Y  C2021 02 17.32972109 29 27.59 +32 23 08.7          20.91GVED046G96
         K21D00Y  C2021 02 17.33594709 29 28.54 +32 22 45.0          21.29GVED046G96
         K21D00Y KC2021 02 17.42746209 29 42.86 +32 16 53.8          20.92GVED046I52
         K21D00Y KC2021 02 17.43082209 29 43.43 +32 16 40.7          20.87GVED046I52
         K21D00Y 1C2021 02 18.12833 09 31 45.21 +31 33 40.4          21.5 VVED046033
         K21D00Y 1C2021 02 18.13192 09 31 45.79 +31 33 26.5          21.6 VVED046033
         K21D00Y 1C2021 02 18.13552 09 31 46.35 +31 33 13.8          21.9 VVED046033
         K21D00Y KC2021 02 18.41410109 32 32.98 +31 17 00.8          21.05GVED046I52
         K21D00Y KC2021 02 18.41745809 32 33.54 +31 16 48.9          21.10GVED046I52
         K21D00Y KC2021 02 18.42560509 32 34.72 +31 16 19.1          21.39GVED046I52
         K21D00Y KC2021 02 18.42896509 32 35.20 +31 16 05.2          20.51GVED046I52
         K21D00Y KC2021 02 19.16896509 34 40.52 +30 33 02.6          20.59GVED046I52
         K21D00Y KC2021 02 19.17315309 34 41.02 +30 32 47.9          21.44GVED046I52
         K21D00Y KC2021 02 19.18153509 34 42.19 +30 32 21.2          20.98GVED046I52
    
    Observer details:
    033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
        Hoegner, U. Laux, F. Ludwig, B. Stecklum.  Measurer B. Stecklum.  1.34-m
        f/3 Schmidt + CCD.
    G96 Mt. Lemmon Survey.  Observer T. A. Pruyne.  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.  1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  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.
    
    Orbital elements:
    2021 DY                                                  Earth MOID = 0.0500 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
    M 352.40604              (2000.0)            P               Q                  
    n   0.41881290     Peri.   86.56653     -0.14444914     -0.98946303             
    a   1.7692506      Node    11.75267     +0.88754171     -0.13396558             
    e   0.4360823      Incl.    2.77646     +0.43749762     -0.05491926             
    P   2.35           H   24.51          G   0.15           U   8                  
    Residuals in seconds of arc
    210217 G96  0.3-  0.4+    210218 033  0.0+  0.0+    210218 I52  0.2-  0.8-
    210217 G96  0.0-  0.2-    210218 033  0.1+  0.5-    210219 I52  0.6+  0.2+
    210217 G96  0.2-  0.1+    210218 033  0.2-  0.2+    210219 I52  0.4-  0.6-
    210217 G96  0.1-  0.0+    210218 I52  0.5-  0.0-    210219 I52  0.0-  0.5+
    210217 I52  0.3+  0.2-    210218 I52  0.3+  0.4+
    210217 I52  0.7+  0.3-    210218 I52  0.0+  0.6+
    
    Ephemeris:
    2021 DY                  a,e,i = 1.77, 0.44, 3                   q = 0.9977
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 01 20    02 41 57.8 +57 10 05   0.07516 1.0138   111.4    64.7    21.2
    ...
    2021 02 04    08 08 33.0 +51 03 04   0.08667 1.0564   143.1    34.1    20.7
    ...
    2021 02 12    09 09 14.9 +38 41 42   0.1111  1.0881   154.0    23.4    21.0
    ...
    2021 02 18    09 31 26.1 +31 42 01   0.1353  1.1153   158.5    18.9    21.4
    2021 02 19    09 34 10.8 +30 42 57   0.1398  1.1201   159.0    18.4    21.4
    2021 02 20    09 36 43.9 +29 46 38   0.1443  1.1250   159.4    18.0    21.5
    ...
    2021 02 26    09 48 59.7 +24 58 54   0.1740  1.1553   160.3    16.8    21.9
    ...
    2021 03 06    10 00 26.9 +20 16 21   0.2193  1.1988   158.5    17.7    22.5
    ...
    2021 03 21    10 16 38.0 +14 26 24   0.3229  1.2866   150.3    22.5    23.7
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-D46
    


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