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  • MPEC 2018-V48 : 2017 HG2

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    M.P.E.C. 2018-V48                                Issued 2018 Nov. 6, 00:41 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
    
                                       2017 HG2
    
                               Revision to MPEC 2017-H45
    
    Additional Observations:
         K17H02G  C2018 10 11.52421603 56 53.296+06 38 23.06         24.23GVEV048T12
         K17H02G  C2018 10 11.53704803 56 53.228+06 38 14.18         24.05GVEV048T12
         K17H02G  C2018 11 02.40555903 45 13.813+01 40 05.21         23.62GVEV048T12
         K17H02G  C2018 11 02.41300903 45 13.320+01 39 58.55         23.28GVEV048T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. Hung, D. Fohring.
        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 (or two decimals in degrees), reference and Delta-T
    181011 T12 91.8+ 17.1+    181102 T12 0.03+ 0.01+    MPO438036   -0.035 day
    
    Orbital elements:
    2017 HG2                                                 Earth MOID = 0.1080 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M   8.91514              (2000.0)            P               Q
    n   0.45832498     Peri.  354.72533     -0.91996434     -0.38946976
    a   1.6660462      Node   162.15197     +0.36475396     -0.89205805
    e   0.3409863      Incl.    8.34549     +0.14359720     -0.22922857
    P   2.15           H   21.9           G   0.15           U   2
    Residuals in seconds of arc
    170203 F51  0.1+  0.0     170422 H01  0.2-  0.2+    170427 F51  0.0   0.1+
    170203 F51  0.1-  0.2-    170422 H01  0.2+  0.1-    170427 F51  0.2-  0.0
    170203 F51  0.1+  0.0     170422 H01  0.1-  0.1-    170502 I52  0.2-  0.2+
    170203 F51  0.1+  0.1+    170422 691  0.0   0.2-    170502 I52  0.0   0.2+
    170419 F51  0.1-  0.1+    170422 705  0.4-  0.3-    170502 I52  0.6-  0.4-
    170419 F51  0.2+  0.0     170422 705  0.2-  0.2+    170502 I52  0.5+  0.2-
    170419 F51  0.2+  0.1+    170422 691  0.3-  0.2+    170502 691  0.1-  0.0
    170420 691  0.2+  0.1-    170422 926  0.2+  0.1+    170502 691  0.1-  0.4-
    170420 691  0.2-  0.2+    170422 926  0.1-  0.3+    170506 691  0.3+  0.5+
    170420 691  0.0   0.0     170422 926  0.0   0.2+    170506 691  0.4-  0.1+
    170420 568  0.4+  0.0     170424 807  0.2-  0.5-    170529 691  0.0   0.3-
    170420 568  0.2+  0.0     170424 807  0.5-  0.4-    170529 691  0.5+  0.6-
    170421 691  0.8+  0.3-    170424 807  0.3-  0.2-    170529 691  0.7+  0.3+
    170421 691  0.1-  0.7+    170424 291  0.2-  0.2-    181011 T12  0.1-  0.2+
    170422 204  0.2-  0.0     170424 291  0.3-  0.1+    181011 T12  0.0   0.2+
    170422 204  0.0   0.1-    170424 291  0.4-  0.1+    181102 T12  0.0   0.1+
    170422 H01  0.1+  0.1-    170427 F51  0.0   0.0     181102 T12  0.0   0.1+
    
    Ephemeris:
    2017 HG2                 a,e,i = 1.67, 0.34, 8                   q = 1.0979
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 10 07    03 56 37.9 +07 28 39   0.9502  1.7912   133.5    23.9    24.2
    ...
    2018 10 22    03 54 02.7 +04 24 57   0.8036  1.7276   147.4    18.1    23.5
    ...
    2018 10 30    03 48 28.8 +02 30 35   0.7408  1.6923   154.5    14.6    23.2
    ...
    2018 11 05    03 42 24.7 +01 01 38   0.7018  1.6652   158.7    12.5    23.0
    2018 11 06    03 41 15.3 +00 46 50   0.6960  1.6607   159.2    12.2    22.9
    2018 11 07    03 40 03.6 +00 32 06   0.6904  1.6561   159.7    12.0    22.9
    ...
    2018 11 13    03 32 11.1 -00 53 46   0.6614  1.6285   160.6    11.6    22.8
    ...
    2018 11 21    03 20 25.0 -02 35 07   0.6345  1.5910   156.9    14.1    22.7
    ...
    2018 12 06    02 58 42.9 -04 32 29   0.6169  1.5194   141.9    23.6    22.9
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-V48
    

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