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  • MPEC 2017-Y158: 2017 YJ7

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    M.P.E.C. 2017-Y158                               Issued 2017 Dec. 30, 19:32 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 YJ7
    
    Observations:
         K17Y07J  C2017 12 28.45991 10 07 37.85 +28 57 56.3          21.6 GUEY158G96
         K17Y07J  C2017 12 28.46014 10 07 37.61 +28 57 57.3          21.9 GUEY158G96
         K17Y07J  C2017 12 28.46037 10 07 37.50 +28 57 57.3          21.9 GUEY158G96
         K17Y07J  C2017 12 28.46060 10 07 37.28 +28 57 58.1          20.8 GUEY158G96
         K17Y07J* C2017 12 28.48207 10 07 19.71 +28 59 05.4          21.2 GUEY158G96
         K17Y07J  C2017 12 28.48369 10 07 18.38 +28 59 09.5                UEY158G96
         K17Y07J  C2017 12 28.48531 10 07 17.04 +28 59 15.3          20.6 GUEY158G96
         K17Y07J  C2017 12 28.48693 10 07 15.73 +28 59 19.9          20.7 GUEY158G96
         K17Y07J  C2017 12 29.35009 09 56 11.90 +29 44 40.5          20.8 RoEY158926
         K17Y07J  C2017 12 29.35497 09 56 07.54 +29 44 57.5          20.7 RoEY158926
         K17Y07J  C2017 12 29.35985 09 56 03.18 +29 45 15.0          20.7 RoEY158926
         K17Y07J  C2017 12 29.42420 09 55 04.36 +29 48 49.0          21.4 GUEY158G96
         K17Y07J  C2017 12 29.42542 09 55 03.20 +29 48 52.5          20.8 GUEY158G96
         K17Y07J  C2017 12 29.42663 09 55 02.04 +29 48 57.5          21.2 GUEY158G96
         K17Y07J  C2017 12 29.42785 09 55 00.98 +29 49 01.5          21.2 GUEY158G96
         K17Y07J  C2017 12 30.32421 09 41 52.29 +30 36 17.0          20.6 GUEY158I52
         K17Y07J  C2017 12 30.32586 09 41 50.67 +30 36 23.3          19.8 GUEY158I52
         K17Y07J  C2017 12 30.32754 09 41 48.96 +30 36 28.9          20.8 GUEY158I52
         K17Y07J  C2017 12 30.32920 09 41 47.28 +30 36 34.4          21.6 GUEY158I52
         K17Y07J  C2017 12 30.38450 09 40 50.66 +30 39 49.6          19.6 RoEY158926
         K17Y07J  C2017 12 30.38833 09 40 46.69 +30 40 02.4          19.7 RoEY158926
         K17Y07J  C2017 12 30.39218 09 40 42.69 +30 40 15.5          19.7 RoEY158926
         K17Y07J  C2017 12 30.49491 09 38 54.88 +30 45 37.1          20.3 RoEY158926
         K17Y07J  C2017 12 30.49875 09 38 50.82 +30 45 47.9          20.3 RoEY158926
         K17Y07J  C2017 12 30.50259 09 38 46.80 +30 45 59.4          20.0 RoEY158926
    
    Observer details:
    926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
        M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
    G96 Mt. Lemmon Survey.  Observer D. C. Fuls.  Measurers E. J. Christensen,
        D. C. Fuls, A. R. Gibbs, A. D. Grauer, J. A. Johnson, R. A. Kowalski,
        S. M. Larson, G. J. Leonard, R. G. Matheny, R. L. Seaman, F. C. Shelly.
        1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer R. G. Matheny.
        Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
        J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. G. Matheny,
        R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
    
    Orbital elements:
    2017 YJ7                                                 Earth MOID = 0.0130 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M   8.74167              (2000.0)            P               Q
    n   1.42204199     Peri.  351.70975     +0.21555214     +0.97501343
    a   0.7831791      Node   290.72510     -0.89258757     +0.17442120
    e   0.2948009      Incl.    3.29284     -0.39601100     +0.13757203
    P   0.69           H   26.3           G   0.15           U   8
    Residuals in seconds of arc
    171228 G96  0.6+  0.4-    171229 926  0.7+  0.4-    171230 I52  0.2-  0.9-
    171228 G96  0.1-  0.1-    171229 926  1.1+  0.0     171230 926  0.6+  0.4-
    171228 G96  0.9+  0.8-    171229 G96  0.4+  0.5-    171230 926  0.7+  0.4-
    171228 G96  0.5+  0.7-    171229 G96  0.1-  1.0-    171230 926  0.8+  0.2-
    171228 G96  0.2-  0.1+    171229 G96  0.7-  0.0     171230 926  0.5+  0.0
    171228 G96  0.3-  0.7-    171229 G96  0.1+  0.0     171230 926  0.3+  0.4-
    171228 G96  0.5-  0.1+    171230 I52  0.7-  0.6-    171230 926  0.5+  0.1-
    171228 G96  0.3-  0.2-    171230 I52  0.1-  0.2-
    171229 926  0.4+  0.3-    171230 I52  0.2-  0.5-
    
    Ephemeris:
    2017 YJ7                 a,e,i = 0.78, 0.29, 3                   q = 0.5523
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 11 30    11 52 14.4 +17 58 21   0.1217  0.9669    77.3    95.6    25.1
    ...
    2017 12 15    11 27 38.8 +21 13 52   0.08144 0.9997    98.6    76.8    23.5
    ...
    2017 12 23    10 55 21.3 +24 52 25   0.05868 1.0095   114.6    62.4    22.4
    ...
    2017 12 29    10 00 47.3 +29 26 28   0.04302 1.0132   133.1    45.2    21.2
    2017 12 30    09 46 42.7 +30 19 35   0.04074 1.0136   137.1    41.3    21.0
    2017 12 31    09 30 37.4 +31 11 58   0.03860 1.0138   141.5    37.2    20.8
    ...
    2018 01 06    07 07 05.7 +32 53 30   0.03065 1.0135   169.7    10.0    19.4
    ...
    2018 01 14    04 04 29.1 +19 00 19   0.03819 1.0082   129.3    49.0    21.1
    ...
    2018 01 29    02 26 39.6 +03 51 17   0.07675 0.9837    86.9    88.6    23.8
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-Y158
    

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