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    • MPEC 2017-X12 : 2017 WS28

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    M.P.E.C. 2017-X12                                Issued 2017 Dec. 5, 04:18 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

                                   2017 WS28

Observations:
     K17W28S* C2017 11 27.20900 03 12 58.33 +24 28 23.5          20.7 GUEX012G96
     K17W28S  C2017 11 27.21934 03 12 58.51 +24 25 48.5          20.9 GUEX012G96
     K17W28S  C2017 11 27.22446 03 12 58.55 +24 24 30.7          20.4 GUEX012G96
     K17W28S  C2017 11 27.24831 03 12 58.83 +24 18 34.1          21.1 GUEX012G96
     K17W28S  C2017 11 27.24871 03 12 58.87 +24 18 28.0          20.9 GUEX012G96
     K17W28S  C2017 11 27.24912 03 12 58.87 +24 18 21.7          21.2 GUEX012G96
     K17W28S  C2017 11 27.24952 03 12 58.80 +24 18 16.8          21.1 GUEX012G96
     K17W28S  C2017 11 27.34557 03 13 00.17 +23 54 02.8          21.5 GUEX012V06
     K17W28S  C2017 11 27.34630403 12 59.96 +23 53 48.1          21.2 GUEX012H01
     K17W28S  C2017 11 27.34660 03 13 00.20 +23 53 46.9          21.0 GUEX012V06
     K17W28S  C2017 11 27.34867 03 13 00.24 +23 53 15.8          21.2 GUEX012V06
     K17W28S  C2017 11 27.35407203 13 00.11 +23 51 50.0          21.0 GUEX012H01
     K17W28S  C2017 11 27.36267003 13 00.29 +23 49 38.9          21.5 GUEX012H01
     K17W28S  C2017 11 27.36686103 13 00.37 +23 48 35.1          21.6 GUEX012H01
     K17W28S KC2017 11 28.23603903 13 43.59 +20 07 08.6          21.3 VuEX012H21
     K17W28S KC2017 11 28.24410703 13 43.74 +20 05 03.4          21.2 VuEX012H21
     K17W28S KC2017 11 28.25405903 13 43.87 +20 02 29.2          21.0 VuEX012H21
     K17W28S |C2017 12 03.10175 03 17 51.45 -00 36 49.4          20.9 GUEX012807
     K17W28S |C2017 12 03.10626 03 17 51.55 -00 37 55.1          20.8 GUEX012807
     K17W28S |C2017 12 03.10816 03 17 51.59 -00 38 22.7          20.8 GUEX012807
     K17W28S |C2017 12 03.11040 03 17 51.64 -00 38 55.3          20.7 GUEX012807

Observer details:
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  1.00-m f/10.0 astrograph
    + 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.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 reflector + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.81-m f/4.0
    astrograph + CCD.
V06 Catalina Sky Survey-Kuiper.  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.  1.55-m reflector + CCD.

Orbital elements:
2017 WS28                                                Earth MOID = 0.0934 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
M 270.68717              (2000.0)            P               Q
n   0.70534133     Peri.  219.71756     -0.20375118     -0.90536988
a   1.2498843      Node   245.05119     +0.96977114     -0.13445245
e   0.1629012      Incl.   24.26066     +0.13427358     -0.40277527
P   1.40           H   25.3           G   0.15           U   8
Residuals in seconds of arc
171127 G96  0.2-  0.4-    171127 V06  0.1+  0.2+    171128 H21  0.0   0.2+
171127 G96  0.4+  0.4-    171127 H01  0.1+  0.0     171128 H21  0.0   0.1-
171127 G96  0.0   1.4-    171127 V06  0.3+  0.0     171128 H21  0.8-  0.2-
171127 G96  0.2-  0.3+    171127 V06  0.3+  0.3+    171203 807  0.0   0.1+
171127 G96  0.3+  0.3+    171127 H01  0.1+  0.1+    171203 807  0.0   0.0
171127 G96  0.2+  0.1+    171127 H01  0.1+  0.1-    171203 807  0.0   0.0
171127 G96  0.8-  1.2+    171127 H01  0.0   0.0     171203 807  0.0   0.1-

Ephemeris:
2017 WS28                a,e,i = 1.25, 0.16, 24                  q = 1.0463
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2017 11 05    02 58 19.8 +71 06 14   0.2155  1.1275   124.4    46.5    24.0
...
2017 11 20    03 07 53.9 +49 24 08   0.1237  1.0965   149.5    27.2    22.2
...
2017 11 28    03 13 33.7 +21 08 24   0.09862 1.0824   165.6    13.1    21.2
...
2017 12 04    03 18 38.5 -04 10 36   0.1028  1.0731   146.8    30.2    21.8
2017 12 05    03 19 32.9 -07 56 51   0.1054  1.0717   143.1    33.5    22.0
2017 12 06    03 20 28.1 -11 30 07   0.1085  1.0703   139.6    36.6    22.1
...
2017 12 12    03 26 16.1 -28 06 55   0.1343  1.0626   122.4    51.5    23.0
...
2017 12 20    03 34 45.6 -40 35 18   0.1792  1.0546   108.5    62.2    23.9
...
2018 01 04    03 53 02.2 -50 27 43   0.2681  1.0467    96.2    69.1    25.0

A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-X12

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