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  • MPEC 2017-Y112: 2017 YZ4

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    M.P.E.C. 2017-Y112                               Issued 2017 Dec. 26, 19:52 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 YZ4
    
    Observations:
         K17Y04Z* C2017 12 25.23606 05 00 01.49 +17 07 56.6          18.9 GUEY112G96
         K17Y04Z  C2017 12 25.24123 04 59 59.71 +17 08 19.2          20.2 GUEY112G96
         K17Y04Z  C2017 12 25.24638 04 59 57.83 +17 08 41.1                UEY112G96
         K17Y04Z  C2017 12 25.25155 04 59 56.04 +17 09 02.7          19.8 GUEY112G96
         K17Y04Z  C2017 12 25.28369 04 59 44.50 +17 11 16.9          19.8 GUEY112I52
         K17Y04Z  C2017 12 25.28445 04 59 44.23 +17 11 20.2          19.6 GUEY112I52
         K17Y04Z  C2017 12 25.28521 04 59 43.94 +17 11 23.3          19.8 GUEY112I52
         K17Y04Z  C2017 12 25.28597 04 59 43.66 +17 11 26.4          19.9 GUEY112I52
         K17Y04Z KC2017 12 25.93428 04 57 14.35 +18 06 14.3          19.5 RoEY112K88
         K17Y04Z KC2017 12 25.93945 04 57 11.97 +18 06 47.3          19.4 RoEY112K88
         K17Y04Z  C2017 12 26.16682 04 56 30.45 +18 36 08.0          18.8 GUEY112I52
         K17Y04Z  C2017 12 26.16700 04 56 30.37 +18 36 09.3          19.1 GUEY112I52
         K17Y04Z  C2017 12 26.16719 04 56 30.24 +18 36 11.0          19.3 GUEY112I52
         K17Y04Z  C2017 12 26.16737 04 56 30.17 +18 36 12.9          19.0 GUEY112I52
         K17Y04Z  C2017 12 26.19295 04 56 16.08 +18 39 46.5          19.6 GUEY112G96
         K17Y04Z  C2017 12 26.19812 04 56 13.12 +18 40 29.9          19.4 GUEY112G96
         K17Y04Z  C2017 12 26.20328 04 56 10.17 +18 41 13.3          19.8 GUEY112G96
         K17Y04Z  C2017 12 26.20844 04 56 07.24 +18 41 55.9          19.4 GUEY112G96
         K17Y04Z  C2017 12 26.22067 04 56 00.17 +18 43 50.1          19.5 RoEY112926
         K17Y04Z  C2017 12 26.22355 04 55 58.45 +18 44 14.0          19.6 RoEY112926
         K17Y04Z  C2017 12 26.22646 04 55 56.74 +18 44 38.5          19.5 RoEY112926
    
    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 G. J. Leonard.  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. A. Kowalski.
        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.
    K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
    
    Orbital elements:
    2017 YZ4                                                 Earth MOID = 0.0015 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 271.24569              (2000.0)            P               Q
    n   0.56673546     Peri.   55.81295     -0.87412173     -0.48333589
    a   1.4461582      Node    95.24109     +0.42828901     -0.81357103
    e   0.4007416      Incl.    2.75898     +0.22908453     -0.32324695
    P   1.74           H   27.9           G   0.15           U   5
    Residuals in seconds of arc
    171225 G96  0.3-  0.5-    171225 I52  0.1+  0.1-    171226 G96  0.3+  0.2-
    171225 G96  0.3+  0.2+    171225 K88  0.0   0.0     171226 G96  0.1-  0.1-
    171225 G96  0.5-  0.3+    171225 K88  0.7-  0.5+    171226 G96  0.0   0.1+
    171225 G96  0.2+  0.1+    171226 I52  0.0   0.2-    171226 G96  0.7+  0.5-
    171225 I52  0.3+  0.1-    171226 I52  0.3+  0.4-    171226 926  0.1-  0.5+
    171225 I52  0.4+  0.0     171226 I52  0.1-  0.3-    171226 926  0.3-  0.3+
    171225 I52  0.1+  0.0     171226 I52  0.3+  0.1+    171226 926  0.0   0.4+
    
    Ephemeris:
    2017 YZ4                 a,e,i = 1.45, 0.40, 3                   q = 0.8666
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 11 26    05 09 59.1 +14 42 07   0.1935  1.1740   163.7    13.6    25.5
    ...
    2017 12 11    05 09 42.5 +14 17 17   0.09836 1.0820   171.3     7.9    23.6
    ...
    2017 12 19    05 07 07.3 +14 39 50   0.05280 1.0355   167.2    12.2    22.3
    ...
    2017 12 25    05 00 37.7 +16 54 32   0.01996 1.0025   161.7    17.9    20.3
    2017 12 26    04 57 03.5 +18 18 28   0.01455 0.9972   160.4    19.3    19.7
    2017 12 27    04 49 13.4 +21 20 55   0.0091710.9920   158.4    21.4    18.7
    ...
    2018 01 02    17 12 35.7 -11 54 51   0.02362 0.9620    25.5   153.9    28.9
    ...
    2018 01 10    17 09 49.8 -14 12 43   0.06768 0.9272    32.8   145.0    29.5
    ...
    2018 01 25    17 19 27.2 -15 36 25   0.1544  0.8822    45.0   127.8    29.1
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-Y112
    

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