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  • MPEC 2018-T158: 2016 HM2

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    M.P.E.C. 2018-T158                               Issued 2018 Oct. 13, 01:22 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
    
                                       2016 HM2
    
                               Revision to MPEC 2016-H49
    
    Additional Observations:
         K16H02M  C2018 10 05.58615604 56 22.968-02 01 50.45         23.09GVET158T12
         K16H02M  C2018 10 05.59787104 56 23.253-02 01 55.60         23.26GVET158T12
         K16H02M  C2018 10 10.59792404 58 05.207-02 38 12.49         22.66GVET158T12
         K16H02M  C2018 10 10.60390404 58 05.258-02 38 15.12         22.63GVET158T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observer D. Hung.  Measurer
        D. J. Tholen.  2.24-m f/10.1 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    181005 T12 25.0+ 14.9+    181010 T12 27.0+ 15.4+    MPO386978   -0.018 day
    
    Orbital elements:
    2016 HM2                                                 Earth MOID = 0.2721 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M 248.08911              (2000.0)            P               Q
    n   0.57786722     Peri.  149.62032     -0.20282571     +0.95499552
    a   1.4275259      Node   107.93823     -0.93795415     -0.12598850
    e   0.1049577      Incl.   13.14973     -0.28125389     -0.26853390
    P   1.71           H   21.0           G   0.15           U   1
    Residuals in seconds of arc
    160421 F51  0.2+  0.2+    160519 691  0.7+  0.1-    160617 H21  0.4-  0.2+
    160421 F51  0.2+  0.1-    160519 691  1.1+  0.1+    160623 204  0.1+  0.0
    160421 F51  0.2+  0.2+    160519 H21  0.5+  0.7-    160623 204  0.5-  0.0
    160421 F51  0.0   0.3+    160519 H21  0.5+  0.7-    160623 204  0.3-  0.7+
    160422 695  0.1-  0.4+    160519 H21  0.3+  0.8-    160628 H21  0.1+  0.2+
    160422 695  0.1+  0.2+    160526 705  0.1+  0.1-    160628 H21  0.2-  0.1+
    160422 695  0.0   0.3+    160526 705  0.2+  0.0     160628 H21  0.0   0.2-
    160426 291  0.1-  0.2+    160526 705  0.1+  0.1-    160630 H21  0.0   0.1+
    160426 291  0.4-  0.5+    160526 926  0.1-  0.3+    160630 H21  0.2-  0.3+
    160426 291  0.3-  0.6+    160526 926  0.1+  0.2+    160630 H21  0.2-  0.2+
    160427 291  0.1-  0.5+    160526 926  0.0   0.3+    160703 G45  0.6-  0.2+
    160427 291  0.3+  0.5+    160527 691  0.0   0.3+    160703 G45  0.3-  0.1+
    160427 291  0.5+  0.4-    160527 691  0.6-  0.1+    160703 G45  0.3+  0.4-
    160503 568  0.0   0.0     160527 926  0.6+  0.2+    160703 G45  0.2+  0.1-
    160503 568  0.1-  0.0     160527 926  0.3-  0.4+    160703 G45  0.1+  0.2+
    160503 568  0.1-  0.0     160527 926  0.0   0.4+    160703 G45  0.5+  0.5+
    160503 568  0.0   0.0     160529 H21  0.2-  0.0     160703 G45  0.0   0.0
    160503 568  0.0   0.1-    160529 H21  0.1-  0.2+    160703 G45  0.1-  0.1+
    160503 568  0.1-  0.0     160529 H21  0.0   0.4+    160703 G45  0.4-  0.1+
    160503 568  0.1+  0.0     160605 691  0.6-  0.1+    160703 G45  0.4+  0.6+
    160503 568  0.2-  0.0     160605 691  0.1+  0.0     160703 G45  0.2-  0.3+
    160506 J04  0.3-  0.1+    160605 691  0.3-  0.2-    160703 691  0.4+  0.4-
    160506 J04  0.4-  0.4+    160608 H45  0.0   0.5-    160703 691  0.3+  0.5-
    160506 J04  0.3-  0.2-    160608 H45  0.3+  0.2-    160704 G45  0.1+  0.1-
    160513 691  0.4+  0.7-    160608 H45  0.2+  0.2+    160704 G45  0.4-  0.2-
    160513 H36  0.5+  1.1+    160608 H45  0.4+  0.1-    160704 G45  0.6-  0.1+
    160513 691  0.2+  0.4-    160608 H45  0.2-  0.1+    160704 G45  0.1+  0.3+
    160513 H36  0.1+  0.5+    160608 H45  0.0   0.3-    160704 G45  0.1+  0.1-
    160513 691  0.1-  0.0     160610 H45  0.6+  0.4+    160704 G45  0.1-  0.2-
    160513 H36  0.1-  0.4+    160610 H45  0.5+  0.2+    160704 G45  0.3-  0.4+
    160515 H21  0.1+  0.5+    160610 H45  0.5-  0.1+    160704 G45  0.1-  0.2+
    160515 H21  0.3+  0.5+    160610 H45  0.0   0.5-    160704 G45  0.0   0.8+
    160515 H21  0.3+  0.4+    160610 H45  0.0   0.5-    160704 G45  0.2-  0.1-
    160516 H21  0.4-  0.0     160610 H45  0.0   0.1+    160704 G45  0.2-  0.2+
    160516 H21  0.0   0.2-    160614 G96  0.5-  0.6+    160704 G45  0.1-  0.1-
    160516 H21  0.1-  0.1-    160614 G96  0.0   0.1+    160704 G45  0.5-  0.5+
    160516 691  0.0   0.1+    160614 G96  0.6+  0.0     160704 G45  0.0   0.2+
    160516 691  0.1+  0.2-    160614 G96  0.2+  0.5-    160704 G45  0.2+  0.2-
    160516 691  0.5+  0.2-    160614 691  0.4+  0.6-    181005 T12  0.1-  0.0
    160517 691  0.3+  0.7-    160614 691  0.2+  0.5-    181005 T12  0.1+  0.0
    160517 691  0.3+  0.3-    160614 691  0.3+  0.6-    181010 T12  0.0   0.0
    160517 691  0.5+  0.1-    160617 H21  0.1+  0.1+    181010 T12  0.0   0.0
    160519 H21  0.7+  0.4+    160617 H21  0.0   0.1+
    160519 H21  0.9+  0.2+    160617 H21  0.4-  0.3+
    
    Ephemeris:
    2016 HM2                 a,e,i = 1.43, 0.10, 13                  q = 1.2777
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 09 13    04 35 13.1 +00 25 51   0.9354  1.5083   101.9    40.8    23.4
    ...
    2018 09 28    04 51 32.2 -01 07 49   0.8427  1.5254   111.3    37.8    23.1
    ...
    2018 10 06    04 56 34.2 -02 04 46   0.7947  1.5336   117.0    35.5    22.9
    ...
    2018 10 12    04 58 20.1 -02 48 13   0.7602  1.5394   121.6    33.5    22.7
    2018 10 13    04 58 26.9 -02 55 22   0.7546  1.5403   122.4    33.2    22.7
    2018 10 14    04 58 30.5 -03 02 28   0.7491  1.5412   123.2    32.8    22.7
    ...
    2018 10 20    04 57 43.2 -03 43 13   0.7175  1.5465   128.3    30.4    22.5
    ...
    2018 10 28    04 53 29.7 -04 29 15   0.6801  1.5530   135.4    26.7    22.3
    ...
    2018 11 12    04 35 56.4 -05 05 22   0.6309  1.5631   148.5    19.3    21.9
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-T158
    

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