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  • MPEC 2020-K71 : 2018 JA3

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    M.P.E.C. 2020-K71                                  Issued 2020 May 19, 15:01 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 JA3                                 
    
    
                               Revision to MPEC 2018-J84                            
    
    Additional Observations:
         K18J03A KC2020 05 17.27784307 40 18.199+38 01 22.77         24.76GVEK071T14
         K18J03A KC2020 05 19.26329807 47 09.402+37 34 44.54         25.20GVEK071T14
    
    Observer details:
    T14 Mauna Kea-UH/Tholen NEO Follow-Up (CFHT).  Observers L. Wells, C. Crowder.  
        Measurer D. J. Tholen.  3.6-m f/4.1 reflector + MegaCam.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    200517 T14 0.12- 0.01-    200519 T14 0.12- 0.02-    MPO457151   -0.35 days
    
    Orbital elements:
    2018 JA3                                                 Earth MOID = 0.2276 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M 334.14025              (2000.0)            P               Q
    n   0.43393287     Peri.  159.12726     -0.88508284     +0.39028093
    a   1.7279096      Node    46.53243     -0.46098844     -0.65996055
    e   0.2925332      Incl.   20.45152     -0.06417184     -0.64197576
    P   2.27           H   21.4           G   0.15           U   2
    Residuals in seconds of arc
    180513 G96  0.1+  0.1+    180514 033  0.4-  0.1+    180519 691  0.0   0.1+
    180513 G96  0.1+  0.1-    180515 673  0.1+  0.0     180519 691  0.1-  0.4-
    180513 G96  0.4-  0.2-    180515 673  0.3+  0.0     180519 691  0.4-  0.7+
    180513 G96  0.2-  0.2-    180515 H01  0.2-  0.0     180522 I52  0.2-  0.1+
    180513 I52  0.3+  0.0     180515 H01  0.1-  0.1-    180522 I52  0.5-  0.8-
    180513 I52  0.3-  0.2+    180515 H01  0.2-  0.1-    180522 I52  0.2-  0.2+
    180513 I52  0.2-  0.3+    180515 H01  0.1-  0.0     180522 I52  0.1-  0.3-
    180513 I52  0.1-  0.3-    180515 I52  0.2+  0.2-    180523 I52  0.3-  0.1+
    180513 673  0.0   0.3-    180515 I52  0.0   0.1-    180523 I52  0.2-  0.9-
    180513 673  0.0   0.0     180515 I52  0.1-  0.3+    180523 I52  0.0   0.4-
    180513 033  0.1-  0.5+    180515 I52  0.1-  0.0     180523 I52  0.1-  0.1+
    180513 033  0.2-  0.2+    180516 H36  0.1-  0.2+    180602 G96  0.6+  0.0
    180513 033  0.3+  0.1+    180516 H36  0.4-  0.2-    180602 G96  0.3-  0.5+
    180513 033  0.1+  0.1-    180516 H36 (1.1-  1.7-)   180602 G96  0.4-  0.8+
    180513 033  0.2+  0.3+    180516 H36  1.1-  0.6-    180602 G96  0.3+  0.6+
    180513 033  0.2-  0.0     180516 G96  0.7-  0.1+    180607 474  0.3+  0.0
    180513 033  0.1-  0.1+    180516 G96  0.1-  0.2-    180607 474  0.0   0.1-
    180513 J95  1.2+  0.1+    180516 G96  0.1-  0.5+    180607 474  0.1+  0.2-
    180513 J95  0.1-  0.2+    180516 G96  0.0   0.0     180607 474  0.1+  0.3-
    180514 033  0.1-  0.1-    180517 I52  0.5+  0.2-    200517 T14  0.0   0.0
    180514 033  0.2-  0.6-    180517 I52  0.1-  0.3-    200519 T14  0.0   0.0
    180514 033  0.0   0.1-    180517 I52  0.5-  0.2-
    
    Ephemeris:
    2018 JA3                 a,e,i = 1.73, 0.29, 20                  q = 1.2224
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 04 19    06 05 05.7 +41 57 05   1.6032  1.4627    63.4    37.9    24.8
    ...
    2020 05 04    06 54 44.6 +40 24 05   1.6321  1.4065    58.9    37.8    24.7
    ...
    2020 05 12    07 22 06.8 +39 05 24   1.6425  1.3781    56.8    37.8    24.7
    ...
    2020 05 18    07 42 48.0 +37 51 52   1.6486  1.3577    55.3    37.8    24.7
    2020 05 19    07 46 15.1 +37 38 22   1.6495  1.3544    55.1    37.8    24.7
    2020 05 20    07 49 42.1 +37 24 30   1.6504  1.3512    54.9    37.8    24.7
    ...
    2020 05 26    08 10 22.4 +35 53 50   1.6549  1.3321    53.6    37.7    24.6
    ...
    2020 06 03    08 37 41.8 +33 32 55   1.6598  1.3084    52.0    37.7    24.6
    ...
    2020 06 18    09 27 35.7 +28 09 44   1.6676  1.2705    49.5    37.5    24.5
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-K71
    


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