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  • MPEC 2019-Q122 : 2018 YQ2

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    M.P.E.C. 2019-Q122                                Issued 2019 August 30, 11:18 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 YQ2                                 
    
    
                               Revision to MPEC 2019-A18                            
    
    Additional Observations:
         K18Y02Q KC2019 08 27.48008923 07 19.630-03 58 36.00         25.53GVEQ122T12
         K18Y02Q KC2019 08 28.45920823 04 52.446-04 13 59.10         25.40GVEQ122T12
    
    Observer details:
    T12 Mauna Kea-UH/Tholen NEO Follow-Up (2.24-m).  Observers D. J. Tholen, 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, reference and Delta-T
    190827 T12 14.9-  6.1-    190828 T12 14.9-  6.2-    MPO467309   +0.00 days
    
    Orbital elements:
    2018 YQ2                                                 Earth MOID = 0.0016 AU
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
    M  42.32805              (2000.0)            P               Q
    n   0.84716631     Peri.  293.40536     -0.99986594     -0.01527012
    a   1.1061744      Node   245.72013     +0.01636218     -0.91839633
    e   0.2226673      Incl.    0.37141     +0.00060984     -0.39536693
    P   1.16           H   26.0           G   0.15           U   4
    Residuals in seconds of arc
    181231 G96 (1.4+  1.7+)   190101 104  0.1+  1.4+    190108 291  0.9-  0.0
    181231 G96  0.0   0.0     190101 104  0.3+  0.8+    190108 291  0.2+  0.3+
    181231 G96  0.3+  0.0     190101 104  1.2+  0.5+    190108 J95  0.1-  0.3-
    181231 G96  0.2+  0.3-    190103 T12  0.0   0.0     190108 J95  0.2+  0.2+
    181231 F51  0.6+  0.3-    190103 T12  0.0   0.1-    190108 J04  0.1-  0.0
    181231 F51  0.2-  0.2-    190103 291  0.1-  0.1+    190108 J04  0.1-  0.1+
    181231 691  0.3-  0.6-    190103 291  0.2-  0.1-    190108 J04  0.1+  0.1-
    181231 691  0.3+  0.5-    190103 291  0.5-  0.1+    190109 I52  0.5-  0.0
    181231 G96  0.6+  0.6-    190105 I52  0.1-  0.3-    190109 I52  0.0   0.4-
    181231 G96  0.6-  0.3+    190105 I52  0.1-  0.4-    190109 I52  0.2-  0.0
    181231 G96  0.3-  0.9+    190105 I52  0.3-  0.3-    190109 I52  0.2-  0.4-
    181231 L01  0.1-  1.1+    190105 I52  0.1+  0.3+    190109 291  0.4-  0.5-
    181231 L01  0.7-  0.3+    190105 F51  0.2-  0.0     190109 291  0.3-  0.2+
    181231 L01  0.5+  0.2+    190105 F51  0.2-  0.0     190109 291  0.6-  0.2+
    190101 807  0.0   0.4+    190106 204  0.7-  0.3-    190109 T12  0.1-  0.0
    190101 807  0.2+  0.1-    190106 204  0.7-  0.1-    190109 T12  0.1+  0.1+
    190101 807  0.2-  0.2-    190106 204  0.4-  0.0     190827 T12  0.0   0.1+
    190101 J95  0.5+  0.5+    190107 291  0.6-  0.1+    190828 T12  0.0   0.0
    190101 J95  0.1-  0.3-    190107 291  0.9-  0.2-
    190101 104  0.3-  1.0+    190107 291  1.3-  0.1+
    
    Ephemeris:
    2018 YQ2                 a,e,i = 1.11, 0.22, 0                   q = 0.8599
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2019 07 31    23 54 56.1 +00 48 42   0.3631  1.2718   128.1    38.9    25.9
    ...
    2019 08 15    23 35 13.0 -01 05 37   0.3293  1.3033   147.7    24.5    25.3
    ...
    2019 08 23    23 18 12.8 -02 50 27   0.3204  1.3170   160.0    15.2    25.0
    ...
    2019 08 29    23 03 30.7 -04 22 20   0.3196  1.3259   169.7     7.8    24.7
    2019 08 30    23 00 58.7 -04 38 13   0.3201  1.3272   171.3     6.6    24.6
    2019 08 31    22 58 26.2 -04 54 09   0.3207  1.3285   172.9     5.4    24.6
    ...
    2019 09 06    22 43 20.2 -06 28 49   0.3279  1.3357   176.6     2.5    24.5
    ...
    2019 09 14    22 25 04.4 -08 22 57   0.3469  1.3433   164.3    11.7    25.1
    ...
    2019 09 29    22 02 10.3 -10 47 39   0.4074  1.3514   143.5    26.2    25.9
    
    A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-Q122
    


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