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  • MPEC 2023-S205 : 2018 AN18

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    M.P.E.C. 2023-S205                           Issued 2023 September 25, 11:35 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
    
                                    2018 AN18                                
    
    
                               Revision to MPEC 2018-B116                           
    
    Additional Observations:
         K18A18N 1C2022 01 05.28133807 07 09.74 +21 12 06.3          20.53GVES205G96
         K18A18N 1C2022 01 05.28700007 07 09.19 +21 12 16.1          20.66GVES205G96
         K18A18N 1C2022 01 05.29264307 07 08.67 +21 12 26.1          20.62GVES205G96
         K18A18N 1C2022 01 05.29828107 07 08.10 +21 12 35.8          20.67GVES205G96
         K18A18N  C2022 01 27.26884606 39 47.51 +29 43 26.7          21.70GVES205V00
         K18A18N  C2022 01 27.27372006 39 47.27 +29 43 31.6          22.34GVES205V00
         K18A18N  C2022 01 27.27857206 39 47.01 +29 43 36.3          21.99GVES205V00
         K18A18N  C2022 01 27.28342906 39 46.74 +29 43 41.4          22.18GVES205V00
    
    Observer details:
    G96 Mt. Lemmon Survey.  Observer A. R. Gibbs.  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, D. Rankin, R. L. Seaman, F. C.
        Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    V00 Kitt Peak-Bok.  Observer H. Groeller.  Measurers M. J. Brucker, E. J.
        Christensen, C. E. Woodward, G. A. Farneth, J. B. Fazekas, D. C. Fuls, A.
        R. Gibbs, A. D. Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J.
        Leonard, R. S. McMillan, D. Rankin, R. L. Seaman, A. Serrano, F. C.
        Shelly, K. W. Wierzchos.  2.25-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
    220105 G96 0.51- 0.22-    220127 V00 0.41- 0.17-    MPO431474   -0.56 days
    
    Orbital elements:
    2018 AN18                                                Earth MOID = 0.5620 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 177.89320              (2000.0)            P               Q                  
    n   0.23936954     Peri.  276.37588     +0.80910246     -0.37045567             
    a   2.5689568      Node   106.15955     +0.50893932     +0.82984755             
    e   0.5001322      Incl.   28.35692     -0.29382645     +0.41727167             
    P   4.12           H   19.89          G   0.15           U   1                  
    Residuals in seconds of arc
    180111 F51  0.1+  0.1-    180114 568  0.1+  0.2-    220105 G96  0.2-  0.0
    180111 F51  0.1+  0.1-    180114 568  0.0   0.2-    220105 G96  0.2+  0.1+
    180111 F51  0.1+  0.2-    180114 568  0.0   0.2-    220105 G96  0.2-  0.1-
    180111 F51  0.0   0.2-    180118 F51  0.1+  0.3+    220127 V00  0.0   0.1+
    180113 F51  0.1-  0.2-    180123 V06  0.1-  0.3-    220127 V00  0.2+  0.1+
    180113 F51  0.0   0.3-    180123 V06  0.3-  0.3-    220127 V00  0.1+  0.1-
    180113 F51  0.0   0.4-    180123 V06  0.2-  0.1-    220127 V00  0.2-  0.0
    180113 F51  0.1-  0.2-    220105 G96  0.1-  0.1+
    
    Ephemeris:
    2018 AN18                a,e,i = 2.57, 0.50, 28                  q = 1.2841
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 08 26    13 15 19.8 +17 53 06   4.5163  3.8502    43.8    10.5    26.8
    ...
    2023 09 10    13 29 00.7 +15 43 22   4.6295  3.8531    35.4     8.7    26.7
    ...
    2023 09 18    13 36 43.9 +14 37 23   4.6758  3.8537    31.4     7.8    26.7
    ...
    2023 09 24    13 42 40.9 +13 49 37   4.7035  3.8538    28.7     7.2    26.7
    2023 09 25    13 43 41.1 +13 41 49   4.7076  3.8537    28.3     7.1    26.7
    2023 09 26    13 44 41.6 +13 34 03   4.7115  3.8537    27.9     7.0    26.7
    ...
    2023 10 02    13 50 47.7 +12 48 29   4.7312  3.8533    25.7     6.5    26.7
    ...
    2023 10 10    13 59 05.1 +11 50 28   4.7477  3.8521    23.5     5.9    26.7
    ...
    2023 10 25    14 14 58.9 +10 11 15   4.7480  3.8483    22.5     5.7    26.7
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-S205
    


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