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  • MPEC 2020-T14 : 2017 US

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    M.P.E.C. 2020-T14                               Issued 2020 October 6, 15:00 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 US                                 
    
    
                               Revision to MPEC 2017-U61                            
    
    Additional Observations:
         K17U00S  C2020 09 17.22150116 24 19.764-12 21 41.00         23.24GVET014T14
         K17U00S  C2020 09 17.22291116 24 21.042-12 21 46.29         23.34GVET014T14
         K17U00S  C2020 09 17.22432216 24 22.324-12 21 51.55         23.34GVET014T14
         K17U00S  C2020 09 17.22573816 24 23.608-12 21 56.79         23.18GVET014T14
         K17U00S  C2020 09 17.22715916 24 24.898-12 22 02.07         23.02GVET014T14
         K17U00S  C2020 09 17.22866216 24 26.262-12 22 07.67         23.12GVET014T14
         K17U00S KC2020 09 18.27687216 41 02.823-13 26 13.83         23.18GVET014T12
    
    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.
    T14 Mauna Kea-UH/Tholen NEO Follow-Up (CFHT).  Observer 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
    200917 T14 0.10+ 0.13+    200918 T12 0.06+ 0.12+    MPO504259   -0.04 days
    
    Orbital elements:
    2017 US                                                  Earth MOID = 0.0057 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 259.53046              (2000.0)            P               Q
    n   1.30202478     Peri.  357.59733     -0.95422914     +0.29902792
    a   0.8305961      Node   199.80447     -0.27413136     -0.88170285
    e   0.2285572      Incl.    0.91149     -0.11957736     -0.36494162
    P   0.76           H   26.2           G   0.15           U   1
    Residuals in seconds of arc
    171013 703  1.0+  0.2-    171018 I52  0.0   0.1-    171023 703  0.0   0.2-
    171013 703  0.0   0.7+    171018 I52  0.0   0.1-    171023 160  0.2+  0.6-
    171016 703  0.3-  0.3-    171018 I52  0.2+  0.0     171023 160  0.3-  0.7-
    171016 703  0.5+  0.3+    171018 I52  0.2-  0.1-    171023 160  0.1+  0.3+
    171016 703  0.4-  1.3-    171018 246  0.2-  0.4+    171024 474  0.3-  0.1-
    171016 I52  0.1-  0.2+    171018 246  0.1-  0.0     171024 474  0.5-  0.3+
    171016 I52  0.0   0.2-    171018 246  0.6-  0.5-    171024 474  0.2+  0.0
    171016 I52  0.1-  0.1+    171018 246  0.7-  0.2+    171026 703 (3.2-  1.3-)
    171016 I52  0.1+  0.0     171018 246  0.2-  0.2-    171026 703  0.2+  0.5+
    171016 703  0.4+  0.7+    171018 246  0.3-  1.0-    171026 703  0.6+  0.3-
    171016 703  1.3-  0.6+    171018 246  0.4+  0.1-    171026 G96  0.1+  0.2-
    171016 703  0.7-  0.1+    171018 246  0.1+  0.1+    171026 G96  0.4-  0.3-
    171016 703  0.5+  0.5+    171018 246  0.3-  0.1+    171026 G96  0.0   0.0
    171016 246  0.3+  0.3-    171018 587  0.3+  0.8-    171026 G96  0.3-  0.2-
    171016 246  0.4-  0.4-    171018 587  0.4+  0.8-    171027 926  0.4+  0.2+
    171016 246  0.2-  0.5-    171018 K88  0.0   0.2+    171027 926  0.3+  0.3-
    171016 246  0.6-  0.5+    171018 K88  0.1-  0.4+    171027 926  0.7-  0.0
    171016 246  0.1+  0.7-    171018 K88  0.0   0.4+    171027 926  0.0   0.1-
    171016 246  0.6+  0.1+    171018 J04  0.1+  0.1-    171027 926  0.4-  0.2+
    171016 K63  0.1-  0.2-    171018 J04  0.1-  0.1+    171027 926  0.3-  0.4+
    171016 K63  0.3+  0.1+    171018 J04  0.0   0.0     171027 V06  0.4+  0.2-
    171016 K63  0.5-  0.8-    171019 104  0.1-  0.2+    171027 V06  0.1+  0.1-
    171017 K88  0.4-  0.3+    171019 104  0.0   0.2+    171027 V06  0.0   0.0
    171017 K88  0.2-  0.3+    171019 104  0.1-  0.2+    171027 V06  0.1+  0.1+
    171017 K88  0.2-  0.5+    171019 703  0.7+  0.5+    171027 474  0.2-  0.1-
    171017 204  0.1-  0.0     171019 703  0.3+  0.0     171027 474  0.0   0.2-
    171017 204  0.1-  0.1+    171019 703  0.3+  0.5+    171027 474  0.2-  0.0
    171017 204  0.2-  0.2-    171019 703  0.9-  0.3+    171028 V06  0.1-  0.2+
    171017 160  0.0   0.2+    171019 703  0.2-  0.1+    171028 V06  0.1-  0.1+
    171017 160  0.1+  0.0     171019 703  0.0   0.5+    171028 V06  0.1-  0.2+
    171017 160  0.1+  0.3+    171019 703  1.2-  1.1-    171028 V06  0.6-  0.3+
    171017 160  0.3+  0.5+    171019 F51  0.2+  0.0     171028 474  0.3+  0.1-
    171017 160  0.2+  0.3+    171019 F51  0.0   0.0     171028 474  0.4+  0.2+
    171017 L01  0.1+  0.1-    171019 F51  0.1+  0.1-    171028 474  0.2+  0.0
    171017 L01  0.3-  0.2+    171019 F51  0.4+  0.1+    171113 807  0.3+  0.0
    171017 585  0.0   0.1+    171021 703  1.4+  0.5+    171113 807  0.1-  0.1-
    171017 585  0.1-  0.0     171021 703 (1.5+  0.3+)   171113 807  0.3-  0.2-
    171017 585  0.1-  0.1-    171021 703  1.2+  0.5+    200917 T14  0.0   0.0
    171017 585  0.1-  0.1-    171021 703  1.1+  0.4-    200917 T14  0.0   0.0
    171018 G96  0.2+  0.2+    171023 G58  0.1-  0.1-    200917 T14  0.0   0.0
    171018 G96  0.8+  0.3+    171023 G58  0.3-  0.1+    200917 T14  0.0   0.0
    171018 G96  0.6-  0.5-    171023 G58  0.5-  0.5-    200917 T14  0.0   0.0
    171018 G96  0.1-  0.1+    171023 703  0.3+  0.2+    200917 T14  0.0   0.0
    171018 W25  0.4-  0.3-    171023 703  0.2-  0.1+    200918 T12  0.0   0.0
    171018 W25  0.8-  0.4-    171023 703  0.7-  0.6+
    
    Ephemeris:
    2017 US                  a,e,i = 0.83, 0.23, 1                   q = 0.6408
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 09 06    13 27 55.0 +01 55 16   0.05264 0.9666    37.3   140.8    26.7
    ...
    2020 09 21    17 21 07.5 -15 39 57   0.05077 0.9986    82.4    94.7    23.1
    ...
    2020 09 29    18 47 17.0 -18 49 18   0.06691 1.0100    95.2    81.0    23.2
    ...
    2020 10 05    19 28 09.8 -19 25 09   0.08185 1.0158    98.8    76.6    23.5
    2020 10 06    19 33 40.0 -19 27 05   0.08445 1.0165    99.1    76.2    23.5
    2020 10 07    19 38 52.7 -19 28 15   0.08707 1.0172    99.3    75.8    23.6
    ...
    2020 10 13    20 05 16.4 -19 23 45   0.1030  1.0199    99.5    74.7    23.9
    ...
    2020 10 21    20 31 54.9 -18 59 37   0.1244  1.0199    97.8    75.3    24.3
    ...
    2020 11 05    21 08 25.9 -17 50 38   0.1613  1.0086    91.5    79.3    25.0
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-T14
    


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