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  • MPEC 2017-X84 : 2017 XR

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    M.P.E.C. 2017-X84                                Issued 2017 Dec.  9, 18:59 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 XR
    
    Observations:
         K17X00R* C2017 12 07.28381 03 50 31.758+11 47 26.30         20.4 wUEX084F51
         K17X00R  C2017 12 07.29749 03 50 16.040+11 46 04.43         20.0 wUEX084F51
         K17X00R  C2017 12 07.31118 03 50 00.229+11 44 41.99         20.3 wUEX084F51
         K17X00R KC2017 12 07.89078 03 38 41.23 +10 42 01.2                UEX084J95
         K17X00R KC2017 12 07.89726 03 38 33.16 +10 41 17.2                UEX084J95
         K17X00R KC2017 12 07.90150 03 38 27.88 +10 40 48.7          19.7 GUEX084J95
         K17X00R KC2017 12 08.16038 03 33 09.08 +10 11 13.9          20.1 RoEX084291
         K17X00R KC2017 12 08.16392 03 33 04.56 +10 10 48.9          19.8 RoEX084291
         K17X00R  C2017 12 08.21169 03 32 02.72 +10 05 09.9          19.8 RoEX084926
         K17X00R  C2017 12 08.21413 03 31 59.58 +10 04 52.4          19.8 RoEX084926
         K17X00R  C2017 12 08.21482 03 31 58.68 +10 04 45.5          19.6 GUEX084I52
         K17X00R  C2017 12 08.21659 03 31 56.37 +10 04 34.4          20.0 RoEX084926
         K17X00R  C2017 12 08.21957 03 31 52.49 +10 04 11.1          20.0 GUEX084I52
         K17X00R  C2017 12 08.22011 03 31 51.75 +10 04 07.0          20.0 GUEX084I52
         K17X00R  C2017 12 08.22066 03 31 51.05 +10 04 03.4          19.3 GUEX084I52
         K17X00R KC2017 12 08.81881 03 18 45.10 +08 47 57.8                UEX084J95
         K17X00R KC2017 12 08.82552 03 18 35.81 +08 47 04.1                UEX084J95
         K17X00R KC2017 12 08.82956 03 18 30.18 +08 46 32.6          20.1 GUEX084J95
         K17X00R  C2017 12 09.18125 03 10 17.93 +07 58 40.7          19.3 GUEX084I52
         K17X00R  C2017 12 09.18249 03 10 16.12 +07 58 29.8          19.8 GUEX084I52
         K17X00R  C2017 12 09.18409 03 10 13.79 +07 58 16.8          19.4 GUEX084I52
         K17X00R  C2017 12 09.18534 03 10 11.99 +07 58 05.7          19.5 GUEX084I52
         K17X00R  C2017 12 09.24622 03 08 42.63 +07 49 28.6          19.9 RoEX084926
         K17X00R  C2017 12 09.24866 03 08 39.03 +07 49 07.7          19.6 RoEX084926
         K17X00R  C2017 12 09.25109 03 08 35.47 +07 48 46.9          20.0 RoEX084926
    
    Observer details:
    291 LPL/Spacewatch II.  Observer T. H. Bressi.  1.8-m f/2.7 reflector + CCD.
    926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
        M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
        M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
        M. Huber, E. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk.  1.8-m
        Ritchey-Chretien + 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.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
        + CCD.
    
    Orbital elements:
    2017 XR                                                  Earth MOID = 0.0154 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 196.95986              (2000.0)            P               Q
    n   1.06521867     Peri.  355.98255     -0.81266656     +0.58251916
    a   0.9495333      Node   219.65884     -0.53395830     -0.75512919
    e   0.6979119      Incl.    1.40385     -0.23337007     -0.30075128
    P   0.93           H   23.9           G   0.15           U   9
    Residuals in seconds of arc
    171207 F51  0.1+  0.0     171208 926  0.3+  0.4+    171209 I52  0.2+  0.1+
    171207 F51  0.4+  0.1+    171208 I52  0.5+  0.1-    171209 I52  0.2+  0.3-
    171207 F51  0.2+  0.1+    171208 926  0.1+  0.0     171209 I52  0.3+  0.2+
    171207 J95  1.3+  0.0     171208 I52  0.3+  0.4-    171209 I52  0.7+  0.3-
    171207 J95  0.6+  0.2-    171208 I52  0.3-  0.7-    171209 926  0.0   0.3+
    171207 J95  0.2+  0.0     171208 I52  0.0   0.3-    171209 926  0.1-  0.3+
    171208 291  0.9-  0.0     171208 J95  0.4+  0.1-    171209 926  0.2+  0.4+
    171208 291  0.4-  0.0     171208 J95  0.6+  0.4-
    171208 926  0.2-  0.4+    171208 J95  0.3+  0.3+
    
    Ephemeris:
    2017 XR                  a,e,i = 0.95, 0.70, 1                   q = 0.2868
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 11 09    06 10 59.8 +21 55 12   0.4386  1.3330   134.0    32.3    24.1
    ...
    2017 11 24    05 46 43.8 +20 15 46   0.2450  1.2132   154.6    20.4    22.3
    ...
    2017 12 02    05 00 39.9 +17 22 53   0.1539  1.1385   171.9     7.0    20.6
    ...
    2017 12 08    03 36 27.3 +10 30 38   0.09912 1.0770   156.9    21.0    20.1
    2017 12 09    03 14 33.4 +08 24 41   0.09243 1.0662   150.3    27.2    20.1
    2017 12 10    02 49 54.8 +05 56 09   0.08686 1.0554   142.8    34.3    20.1
    ...
    2017 12 16    23 52 22.3 -12 07 02   0.08527 0.9870    89.4    85.6    21.5
    ...
    2017 12 24    21 28 00.3 -21 19 20   0.1471  0.8873    45.8   127.4    24.9
    ...
    2018 01 08    20 00 43.7 -23 12 07   0.3208  0.6704    10.5   164.5    33.5
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-X84
    

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