[Iaude] MPEC X132: 2018 XR4 [a=1.14,e=0.36,i=10.2,H=26.8]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Sat Dec 15 13:15:17 EST 2018


M.P.E.C. 2018-X132                               Issued 2018 Dec. 15, 18:09 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 at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714


                                   2018 XR4
 
Observations:
     K18X04R* C2018 12 14.26688 03 56 56.65 -00 59 43.9          20.1 GVEX132G96
     K18X04R  C2018 12 14.27294 03 56 46.45 -00 59 26.5          20.1 GVEX132G96
     K18X04R  C2018 12 14.27901 03 56 36.00 -00 59 08.4          20.0 GVEX132G96
     K18X04R  C2018 12 14.28510 03 56 25.58 -00 58 50.4          20.1 GVEX132G96
     K18X04R  C2018 12 14.36027503 54 15.26 -00 55 08.8          20.5 GVEX132H01
     K18X04R  C2018 12 14.36898 03 54 00.73 -00 54 35.1          19.7 GVEX132I52
     K18X04R  C2018 12 14.37046 03 53 58.14 -00 54 30.8          20.6 GVEX132I52
     K18X04R  C2018 12 14.37104503 53 56.61 -00 54 35.8          20.2 GVEX132H01
     K18X04R  C2018 12 14.37121 03 53 56.85 -00 54 28.3          20.3 GVEX132I52
     K18X04R  C2018 12 14.37766003 53 45.15 -00 54 15.3          20.0 GVEX132H01
     K18X04R  C2018 12 14.38306603 53 35.78 -00 53 58.2          19.7 GVEX132H01
     K18X04R  C2018 12 14.39631 03 53 13.14 -00 53 09.7          19.8 GVEX132I52
     K18X04R  C2018 12 14.39705 03 53 11.86 -00 53 07.6          20.2 GVEX132I52
     K18X04R  C2018 12 14.39779 03 53 10.55 -00 53 05.2          20.7 GVEX132I52
     K18X04R  C2018 12 14.39853 03 53 09.26 -00 53 02.2          20.1 GVEX132I52
     K18X04R KC2018 12 14.79510403 41 29.21 -00 31 21.5          20.0 GVEX132L01
     K18X04R KC2018 12 14.79599103 41 27.35 -00 31 17.9          20.1 GVEX132L01
     K18X04R KC2018 12 14.79678103 41 25.70 -00 31 15.3          19.9 GVEX132L01
     K18X04R KC2018 12 14.79866003 41 21.83 -00 31 08.4          20.5 GVEX132L01
     K18X04R KC2018 12 14.79905803 41 21.02 -00 31 06.8          20.3 GVEX132L01
     K18X04R KC2018 12 14.93342 03 36 32.80 -00 22 29.7                VEX132204
     K18X04R KC2018 12 14.94460 03 36 07.92 -00 21 44.6          19.8 GVEX132204
     K18X04R HC2018 12 14.95597 03 35 42.52 -00 20 58.8                VEX132204
     K18X04R  C2018 12 15.25444 03 24 21.42 +00 01 49.0          20.0 GVEX132I52
     K18X04R  C2018 12 15.25520 03 24 19.44 +00 01 52.4          19.4 GVEX132I52
     K18X04R  C2018 12 15.25594 03 24 17.52 +00 01 56.4          19.4 GVEX132I52
     K18X04R  C2018 12 15.25670 03 24 15.62 +00 01 59.9          19.4 GVEX132I52
 
Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector +
    CCD.
G96 Mt. Lemmon Survey.  Observer A. R. Gibbs.  Measurers B. M. Africano,
    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, 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 Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer H. Groeller.
    Measurers B. M. Africano, 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, R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
 
Orbital elements:
2018 XR4                                                 Earth MOID = 0.0020 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M  56.42961              (2000.0)            P               Q
n   0.80463218     Peri.   88.39199     -0.97637461     -0.12409039
a   1.1448215      Node    84.45410     +0.04217701     -0.91236316
e   0.3579928      Incl.   10.23778     +0.21192857     -0.39012183
P   1.22           H   26.8           G   0.15           U   6
Residuals in seconds of arc
181214 G96  0.2-  0.2+    181214 H01  0.3-  0.2-    181214 L01  0.4+  0.3+
181214 G96  1.5+  0.3-    181214 H01  0.2-  0.0     181214 L01  0.7+  0.5+
181214 G96  0.0   0.2-    181214 I52  0.1-  0.0     181214 204  0.2-  0.3-
181214 G96  0.1-  0.3-    181214 I52  0.1+  0.3-    181214 204  0.3-  0.1-
181214 H01  0.4-  0.2+    181214 I52  0.2-  0.2-    181214 204  0.4-  0.1-
181214 I52  0.0   0.0     181214 I52  0.2-  0.5+    181215 I52  0.1-  0.4-
181214 I52  0.2-  0.3-    181214 L01  0.3+  0.6+    181215 I52  0.3-  0.5-
181214 H01  0.3-  0.2-    181214 L01  0.0   0.8+    181215 I52  0.3-  0.0
181214 I52  0.0   0.2-    181214 L01  0.1-  0.5+    181215 I52  0.7+  0.1-

Ephemeris:
2018 XR4                 a,e,i = 1.14, 0.36, 10                  q = 0.7350
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 11 15    05 33 09.4 -01 09 57   0.2332  1.1814   141.8    31.2    25.3
...
2018 11 30    05 27 10.4 -02 42 42   0.1223  1.0949   151.1    25.8    23.6
...
2018 12 08    05 07 17.3 -02 49 33   0.06773 1.0466   154.4    24.0    22.2
...
2018 12 14    04 03 42.1 -01 09 24   0.02955 1.0098   148.8    30.3    20.5
2018 12 15    03 34 15.8 -00 13 38   0.02388 1.0036   143.7    35.5    20.2
2018 12 16    02 48 01.1 +01 15 35   0.01884 0.9975   134.4    44.8    19.9
...
2018 12 22    19 41 08.7 +06 38 25   0.03004 0.9605    39.0   139.8    25.9
...
2018 12 30    18 30 41.3 +04 48 16   0.08161 0.9121    28.0   149.6    29.5
...
2019 01 14    18 12 23.8 +01 52 10   0.1892  0.8285    31.7   141.4    29.8

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-X132



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