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  • MPEC 2024-G117 : 2021 LD5

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    M.P.E.C. 2024-G117                                Issued 2024 April 9, 14:14 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets, routine data on comets and natural satellites,
             and occasional editorial announcements.  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 LD5                                 
    
    
                               Revision to MPEC 2021-L129                           
    
    Additional Observations:
         K21L05D 0C2024 04 04.57583915 03 09.084+06 16 16.65         22.32GVEG117T12
         K21L05D 0C2024 04 04.57746515 03 09.114+06 16 18.10         22.42GVEG117T12
         K21L05D 0C2024 04 04.57941915 03 09.152+06 16 19.80         22.54GVEG117T12
         K21L05D 0C2024 04 04.58123315 03 09.179+06 16 21.34         22.34GVEG117T12
         K21L05D KC2024 04 06.34317115 03 47.45 +06 41 58.2          22.0 GVEG117H21
         K21L05D KC2024 04 06.35347715 03 47.63 +06 42 07.4          21.8 GVEG117H21
    
    Observer details:
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers T. Linder, R. Holmes, L. Horn.  1.3-m f/4.0 astrograph + CCD.
    T12 University of Hawaii 88-inch telescope, Maunakea.  Observers D. J. Tholen,
        M.-T. Hui.  Measurer D. J. Tholen.  2.24-m f/10.1 reflector + 2112 x 2112
        pixels STA1600 10k CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    240404 T12 21.0+  6.9+    240406 H21 21.7+  7.2+    E2024-EF2   -0.00 days
    
    Orbital elements:
    2021 LD5                                                 Earth MOID = 0.1978 AU
    Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                 Veres                   
    M 326.10367              (2000.0)            P               Q                  
    n   0.32039022     Peri.  160.10336     +0.16869631     +0.97651269             
    a   2.1151924      Node   119.40354     -0.92388318     +0.20403950             
    e   0.4287796      Incl.    8.85012     -0.34348425     -0.06921591             
    P   3.08           H   21.37          G   0.15           U   0                  
    Residuals in seconds of arc
    210608 G96  0.1+  0.8-    210616 I52  0.2+  0.2-    210829 F51  0.0   0.1+
    210608 G96  0.4+  0.3+    210616 I52  0.2-  0.1+    210829 F51  0.1+  0.1-
    210608 G96  0.6+  0.4+    210616 I52  0.2+  0.1-    210829 F51  0.1-  0.0
    210608 G96  0.4+  0.2-    210621 I52 (1.8-  0.5-)   210829 F51  0.0   0.1-
    210608 G96  0.0   0.1+    210621 I52  0.3-  0.7-    210907 F52  0.1+  0.1+
    210608 G96  0.0   0.0     210621 I52  0.0   0.2-    210907 F52  0.1+  0.0
    210608 G96  0.2+  0.3-    210709 F51  0.0   0.0     210907 F52  0.0   0.1+
    210611 807  0.3-  0.5-    210709 F51  0.0   0.0     210907 F52  0.0   0.1+
    210611 807  0.2-  0.1+    210709 F51  0.0   0.0     210908 F51  0.1-  0.1+
    210611 807  0.2+  0.1+    210709 F51  0.1-  0.0     210908 F51  0.1+  0.0
    210611 G96  0.1+  0.1+    210715 807  0.1-  0.1-    210908 F51  0.1+  0.0
    210611 G96  0.0   0.2+    210715 807  0.0   0.7-    210908 F51  0.1+  0.0
    210611 G96  0.1+  0.1+    210715 807  0.2-  0.3+    210911 F51  0.0   0.1-
    210612 L01  0.3-  0.1-    210730 807 (0.3-  0.8-)   210911 F51  0.1-  0.1-
    210612 L01  0.0   0.0     210730 807  0.2-  0.0     210911 F51  0.1-  0.0
    210612 L01  0.7-  0.4+    210730 807  0.3+  0.4-    210911 F51  0.2-  0.0
    210612 L01  0.3-  0.1-    210804 P07  2.3-  0.4-    240404 T12  0.0   0.1+
    210612 H21  0.1+  0.1-    210804 P07  1.0-  0.1+    240404 T12  0.0   0.1+
    210612 H21  0.0   0.2-    210804 P07  0.0   1.0-    240404 T12  0.1+  0.1+
    210612 H21  0.0   0.1-    210804 P07  0.3+  0.8-    240404 T12  0.0   0.1+
    210612 N51  2.5-  1.3+    210805 F51  0.0   0.1+    240406 H21  0.2-  0.3-
    210612 N51  2.3-  1.4+    210805 F51  0.1+  0.0     240406 H21  0.1+  0.1-
    
    Ephemeris:
    2021 LD5                 a,e,i = 2.12, 0.43, 9                   q = 1.2082
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2024 03 10    14 44 03.6 +01 20 25   0.8809  1.6950   129.4    26.9    23.5
    ...
    2024 03 25    14 57 20.3 +03 54 33   0.7175  1.6113   139.4    23.7    22.8
    ...
    2024 04 02    15 02 03.0 +05 39 41   0.6428  1.5673   144.3    21.8    22.4
    ...
    2024 04 08    15 04 17.7 +07 06 39   0.5926  1.5348   147.6    20.5    22.2
    2024 04 09    15 04 33.3 +07 21 37   0.5848  1.5294   148.1    20.3    22.1
    2024 04 10    15 04 46.9 +07 36 40   0.5771  1.5241   148.5    20.1    22.1
    ...
    2024 04 16    15 05 27.4 +09 08 01   0.5339  1.4924   150.8    19.2    21.8
    ...
    2024 04 24    15 04 35.2 +11 06 53   0.4841  1.4513   152.1    18.9    21.6
    ...
    2024 05 09    14 58 30.3 +14 01 05   0.4133  1.3792   148.6    22.4    21.2
    
    A. U. Tomatic                (C) Copyright 2024 MPC           M.P.E.C. 2024-G117
    


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