• MPC Preparation (Info)

  • MPEC 2021-J175 : 2018 LD16

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    M.P.E.C. 2021-J175                                 Issued 2021 May 12, 00:52 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
    
                                    2018 LD16                                
    
    
                               Revision to MPEC 2018-M80                            
    
    Additional Observations:
         K18L16D  C2021 05 03.43457 15 32 12.857-10 22 24.46         21.9 wUEJ175F51
         K18L16D  C2021 05 03.44496 15 32 12.437-10 22 23.49         21.5 wUEJ175F51
         K18L16D  C2021 05 03.45534 15 32 12.006-10 22 23.07         21.6 wUEJ175F51
         K18L16D  C2021 05 11.33556 15 26 41.22 -10 17 17.1          21.4 GVEJ175I52
         K18L16D  C2021 05 11.34511 15 26 40.74 -10 17 17.3          20.8 GVEJ175I52
         K18L16D  C2021 05 11.34988 15 26 40.47 -10 17 17.2          22.2 GVEJ175I52
    
    Observer details:
    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 T. A. Pruyne.
        Measurers E. J. Christensen, B. Gray, D. Rankin, F. C. Shelly.  1.0-m
        reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    210503 F51 0.10- 0.03-    210511 I52 0.11- 0.03-    MPO477907   -0.07 days
    
    Orbital elements:
    2018 LD16                                                Earth MOID = 0.2724 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 286.67460              (2000.0)            P               Q
    n   0.31878877     Peri.  201.45625     +0.36330269     +0.92862141
    a   2.1222704      Node    89.91083     -0.84345808     +0.36216593
    e   0.3926822      Incl.    4.31974     -0.39571408     +0.08061090
    P   3.09           H   21.7           G   0.15           U   1
    Residuals in seconds of arc
    180615 F51  0.2+  0.0     180619 F51  0.1-  0.1-    180713 T12  0.0   0.0
    180615 F51  0.1+  0.0     180619 F51  0.0   0.2-    180806 F51  0.2+  0.1+
    180615 F51  0.1-  0.0     180619 F51  0.1+  0.0     180806 F51  0.1-  0.1-
    180617 H21  0.5-  0.0     180619 F51  0.0   0.1-    180806 F51  0.2+  0.1-
    180617 H21  0.0   0.2-    180619 F51  0.2-  0.1-    180813 F51  0.0   0.0
    180617 H21  0.1+  0.5-    180622 807  0.1-  0.1-    180813 F51  0.0   0.0
    180617 807  0.2-  0.7-    180622 807  0.1-  0.1-    180813 F51  0.0   0.0
    180617 807  0.1+  0.3-    180622 807  0.0   0.0     180813 F51  0.1-  0.0
    180617 807  0.4+  0.0     180622 691  1.2-  1.0+    180902 807  0.3-  0.3-
    180617 568  0.0   0.0     180622 691  0.4-  0.3+    180902 807  0.4-  0.4-
    180617 568  0.0   0.0     180622 691  0.0   1.0+    180902 807  0.0   0.5-
    180617 568  0.0   0.0     180708 807  0.1+  0.1-    210503 F51  0.1-  0.2-
    180617 F51  0.1+  0.1+    180708 807  0.1+  0.1-    210503 F51  0.0   0.1+
    180617 F51  0.2+  0.1+    180708 807  0.0   0.0     210503 F51  0.0   0.2-
    180617 F51  0.0   0.0     180709 F51  0.0   0.1+    210511 I52  0.1-  0.4+
    180619 807  0.1+  0.1-    180709 F51  0.2+  0.0     210511 I52  0.5+  0.2+
    180619 807  0.0   0.0     180710 474  0.1-  0.2+    210511 I52  0.3+  0.2+
    180619 807  0.1+  0.4+    180710 474  0.2+  0.3-
    180619 F51  0.1-  0.0     180710 474  0.1-  0.5-
    
    Ephemeris:
    2018 LD16                a,e,i = 2.12, 0.39, 4                   q = 1.2889
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 04 12    15 36 27.0 -10 55 58   0.7081  1.6408   146.7    19.6    23.0
    ...
    2021 04 27    15 35 14.8 -10 31 11   0.5832  1.5688   160.7    12.2    22.2
    ...
    2021 05 05    15 31 15.6 -10 20 37   0.5310  1.5319   168.0     7.9    21.8
    ...
    2021 05 11    15 26 57.4 -10 17 07   0.4987  1.5051   171.6     5.6    21.5
    2021 05 12    15 26 09.2 -10 17 05   0.4939  1.5007   171.8     5.5    21.5
    2021 05 13    15 25 19.8 -10 17 14   0.4892  1.4963   171.8     5.5    21.5
    ...
    2021 05 19    15 20 05.3 -10 22 36   0.4648  1.4708   169.2     7.4    21.4
    ...
    2021 05 27    15 12 57.1 -10 44 13   0.4407  1.4384   161.8    12.7    21.5
    ...
    2021 06 11    15 03 02.1 -12 18 49   0.4188  1.3841   146.5    23.9    21.6
    
    A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-J175
    


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