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  • MPEC 2021-A203 : 2017 UQ51

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    M.P.E.C. 2021-A203                             Issued 2021 January 15, 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 UQ51                                
    
    
                               Revision to MPEC 2017-V33                            
    
    Additional Observations:
         K17U51Q  C2021 01 09.44783206 37 51.027+28 30 54.37         24.33GVEA203T14
         K17U51Q  C2021 01 09.45251506 37 50.612+28 30 54.77         24.65GVEA203T14
         K17U51Q  C2021 01 09.45726006 37 50.187+28 30 55.10         24.03GVEA203T14
         K17U51Q KC2021 01 12.51015306 33 32.089+28 34 22.08         25.03GVEA203T12
    
    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 L. Wells.  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, reference and Delta-T
    210109 T14 28.8-  1.4-    210112 T12 28.6-  1.3-    MPO435143   -0.01 days
    
    Orbital elements:
    2017 UQ51                                           PHA, Earth MOID = 0.0366 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 141.60899              (2000.0)            P               Q
    n   0.38972824     Peri.  244.94691     +0.40636873     +0.91196285
    a   1.8562144      Node    49.14996     -0.80911372     +0.38787263
    e   0.4842246      Incl.    4.28090     -0.42449905     +0.13371083
    P   2.53           H   20.6           G   0.15           U   3
    Residuals in seconds of arc
    171028 F51  0.1-  0.0     171108 309  0.1+  0.1-    171123 291  0.2+  0.3-
    171028 F51  0.1+  0.1+    171108 309  0.0   0.3-    171124 291  0.1-  0.0
    171028 F51  0.1-  0.1-    171108 309  0.1+  0.3-    171124 291  0.1-  0.5+
    171030 695  0.1+  0.2+    171109 H21  0.0   0.0     171124 291  0.3-  0.1+
    171030 695  0.1+  0.1+    171109 H21  0.1+  0.1+    171208 695  0.3+  0.1+
    171030 695  0.1-  0.3+    171109 H21  0.2+  0.1+    171208 695  0.1-  0.4-
    171108 309  0.3+  0.1-    171112 291  0.6-  0.7+    210109 T14  0.1+  0.0
    171108 309  0.1+  0.1-    171112 291  0.1+  0.1-    210109 T14  0.0   0.0
    171108 309  0.1+  0.2-    171112 291  0.4-  0.3+    210109 T14  0.1-  0.0
    171108 309  0.1+  0.1-    171123 291  0.1-  0.0     210112 T12  0.0   0.1+
    171108 309  0.1-  0.1-    171123 291  0.1+  0.1+
    
    Ephemeris:
    2017 UQ51                a,e,i = 1.86, 0.48, 4                   q = 0.9574
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 12 16    07 13 11.1 +27 24 48   1.7254  2.6611   157.4     8.2    24.5
    ...
    2020 12 31    06 51 47.2 +28 12 56   1.7071  2.6874   174.4     2.1    24.2
    ...
    2021 01 08    06 39 56.4 +28 28 51   1.7264  2.6996   169.7     3.7    24.3
    ...
    2021 01 14    06 31 30.1 +28 35 39   1.7541  2.7080   162.4     6.3    24.5
    2021 01 15    06 30 09.6 +28 36 22   1.7598  2.7093   161.1     6.7    24.5
    2021 01 16    06 28 50.3 +28 36 58   1.7658  2.7106   159.9     7.2    24.5
    ...
    2021 01 22    06 21 26.4 +28 38 23   1.8076  2.7181   152.4     9.7    24.7
    ...
    2021 01 30    06 13 13.3 +28 35 22   1.8781  2.7269   142.6    12.7    24.9
    ...
    2021 02 14    06 03 39.9 +28 20 28   2.0469  2.7403   125.4    17.1    25.2
    
    A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-A203
    


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