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  • MPEC 2020-E18 : 2017 RQ16

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    M.P.E.C. 2020-E18                                 Issued 2020 March 6, 11:56 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 RQ16                                
    
    
                               Revision to MPEC 2017-S66                            
    
    Additional Observations:
         K17R16Q  C2020 03 05.20146 11 18 02.91 +28 40 04.0          21.1 GVEE018G96
         K17R16Q  C2020 03 05.20618 11 18 01.78 +28 39 57.0          20.6 GVEE018G96
         K17R16Q  C2020 03 05.21090 11 18 00.62 +28 39 50.5          20.4 GVEE018G96
         K17R16Q  C2020 03 05.21562 11 17 59.48 +28 39 43.1          21.0 GVEE018G96
         K17R16Q  C2020 03 05.30558 11 17 37.54 +28 37 29.1          20.2 GVEE018I52
         K17R16Q  C2020 03 05.30809 11 17 36.86 +28 37 25.4          20.6 GVEE018I52
         K17R16Q  C2020 03 05.31059 11 17 36.28 +28 37 21.7          20.5 GVEE018I52
         K17R16Q  C2020 03 05.43411 11 17 06.03 +28 34 12.9          20.5 GVEE018I52
         K17R16Q  C2020 03 05.43662 11 17 05.41 +28 34 08.8          21.0 GVEE018I52
         K17R16Q  C2020 03 05.43913 11 17 04.81 +28 34 05.1          20.8 GVEE018I52
         K17R16Q  C2020 03 05.44164 11 17 04.17 +28 34 01.1          21.0 GVEE018I52
         K17R16Q  C2020 03 06.18951 11 14 05.41 +28 14 32.7                VEE018G96
         K17R16Q  C2020 03 06.19090 11 14 04.95 +28 14 31.9                VEE018G96
         K17R16Q  C2020 03 06.19229 11 14 04.59 +28 14 29.3          21.1 GVEE018G96
         K17R16Q  C2020 03 06.19369 11 14 04.22 +28 14 27.4          20.6 GVEE018G96
         K17R16Q  C2020 03 06.20453 11 14 01.49 +28 14 10.5          21.5 GVEE018G96
         K17R16Q  C2020 03 06.20592 11 14 01.19 +28 14 07.6          20.6 GVEE018G96
         K17R16Q  C2020 03 06.20871 11 14 00.60 +28 14 03.5          20.6 GVEE018G96
    
    Observer details:
    G96 Mt. Lemmon Survey.  Observer G. J. Leonard.  Measurers E. J. Christensen, 
       G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A. 
       Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L. Seaman,
        F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer T. A. Pruyne.  Measurers 
       E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. 
       Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. 
       Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m 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
    200305 G96 0.18- 0.27-    200306 G96 0.18- 0.28-    MPO416662   -0.42 days
    
    Orbital elements:
    2017 RQ16                                                Earth MOID = 0.3522 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M 356.21633              (2000.0)            P               Q
    n   0.30462108     Peri.  244.92391     -0.50829577     +0.85763513
    a   2.1875740      Node   352.85107     -0.36758149     -0.29806209
    e   0.4749308      Incl.   38.86251     -0.77879346     -0.41907157
    P   3.24           H   20.3           G   0.15           U   4
    Residuals in seconds of arc
    170915 F51  0.2-  0.0     170918 291  0.3-  0.0     200305 I52  0.0   0.2+
    170915 F51  0.1+  0.1-    170923 H21  0.1+  0.1-    200305 I52  0.1-  0.0
    170915 F51  0.2+  0.1+    170923 H21  0.1+  0.1-    200305 I52  0.1+  0.2+
    170916 568  0.1+  0.2-    170923 H21  0.3+  0.0     200305 I52  0.2-  0.1+
    170916 568  0.2+  0.3-    200305 G96  0.2-  0.2-    200306 G96 (2.0+  1.2-)
    170916 568  0.1+  0.2-    200305 G96  0.0   0.2-    200306 G96  0.4+  0.2+
    170917 F51  0.3-  0.0     200305 G96  0.1-  0.2+    200306 G96  0.2+  0.2-
    170917 F51  0.1+  0.0     200305 G96  0.0   0.2-    200306 G96  0.1-  0.1+
    170917 F51  0.2+  0.2+    200305 I52  0.4+  0.0     200306 G96  0.8-  0.2+
    170918 291  0.2-  0.4+    200305 I52  0.4-  0.1+    200306 G96  0.2-  0.5-
    170918 291  0.5-  0.0     200305 I52  0.0   0.2+    200306 G96  1.1+  0.2-
    
    Ephemeris:
    2017 RQ16                a,e,i = 2.19, 0.47, 39                  q = 1.1486
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 02 05    12 30 26.3 +33 21 32   0.8991  1.7234   132.2    25.1    22.4
    ...
    2020 02 20    12 04 43.8 +32 20 50   0.7117  1.6294   146.3    19.7    21.6
    ...
    2020 02 28    11 41 01.0 +30 46 45   0.6300  1.5795   153.5    16.2    21.2
    ...
    2020 03 05    11 18 50.4 +28 45 09   0.5800  1.5425   157.0    14.5    20.9
    2020 03 06    11 14 50.6 +28 19 39   0.5727  1.5363   157.3    14.4    20.8
    2020 03 07    11 10 46.8 +27 52 33   0.5658  1.5302   157.4    14.4    20.8
    ...
    2020 03 13    10 45 21.2 +24 35 18   0.5314  1.4938   155.5    16.0    20.7
    ...
    2020 03 21    10 11 05.9 +18 45 22   0.5059  1.4462   146.8    22.2    20.7
    ...
    2020 04 05    09 18 22.6 +05 32 02   0.5186  1.3617   124.3    37.4    21.1
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-E18
    


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