[Iaude] MPEC X118: 2018 XA4 [a=1.12,e=0.40,i=2.3,H=29.1]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Fri Dec 14 23:01:33 EST 2018


M.P.E.C. 2018-X118                               Issued 2018 Dec. 15, 03:57 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 XA4
 
Observations:
     K18X04A* C2018 12 13.27073 04 13 56.17 +19 17 37.2          20.0 GVEX118G96
     K18X04A  C2018 12 13.27627 04 14 01.69 +19 19 19.6                VEX118G96
     K18X04A  C2018 12 13.28182 04 14 07.14 +19 21 03.0          19.9 GVEX118G96
     K18X04A  C2018 12 13.28736 04 14 12.53 +19 22 44.1                VEX118G96
     K18X04A  C2018 12 13.36015 04 15 22.24 +19 43 35.8          20.5 GVEX118I52
     K18X04A  C2018 12 13.36089 04 15 23.05 +19 43 47.5          20.1 GVEX118I52
     K18X04A  C2018 12 13.36163 04 15 23.74 +19 43 58.9          19.6 GVEX118I52
     K18X04A  C2018 12 13.40650 04 16 06.38 +19 55 40.5          20.5 GVEX118I52
     K18X04A  C2018 12 13.40761 04 16 07.42 +19 55 57.9          20.9 GVEX118I52
     K18X04A  C2018 12 13.40872 04 16 08.49 +19 56 14.9          20.3 GVEX118I52
     K18X04A  C2018 12 13.40983 04 16 09.56 +19 56 31.4          19.9 GVEX118I52
     K18X04A  C2018 12 14.26423 04 27 23.60 +22 31 31.5                VEX118I52
     K18X04A  C2018 12 14.26756 04 27 24.73 +22 31 55.0          20.1 GVEX118I52
     K18X04A  C2018 12 14.27089 04 27 25.91 +22 32 19.1          21.0 GVEX118I52
     K18X04A IC2018 12 15.00505204 32 19.15 +23 39 43.7          21.8 GVEX118L01
     K18X04A pC2018 12 15.00738904 32 19.71 +23 39 52.9          21.8 GVEX118L01
     K18X04A pC2018 12 15.01206304 32 20.76 +23 40 13.4          22.0 GVEX118L01
 
Observer details:
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.
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 XA4                                                 Earth MOID = 0.0015 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M 163.79274              (2000.0)            P               Q
n   0.83108596     Peri.  261.06193     +0.95252596     +0.30189076
a   1.1203974      Node    81.35952     -0.26130359     +0.87712220
e   0.4034751      Incl.    2.28685     -0.15625216     +0.37352191
P   1.19           H   29.1           G   0.15           U   7
Residuals in seconds of arc
181213 G96  0.1-  0.0     181213 I52  0.2+  0.4-    181214 I52  0.5-  0.1-
181213 G96  0.5+  0.8-    181213 I52  0.1+  0.4-    181214 I52  0.1-  0.0
181213 G96  0.4+  0.1+    181213 I52  0.1-  0.3+    181215 L01  0.1+  0.4-
181213 G96  0.2-  0.2-    181213 I52  0.0   0.5+    181215 L01  0.4+  0.8-
181213 I52  1.2-  0.5+    181213 I52  0.2+  0.3+    181215 L01  0.0   0.7+
181213 I52  0.4+  0.2+    181214 I52  0.2-  0.5+

Ephemeris:
2018 XA4                 a,e,i = 1.12, 0.40, 2                   q = 0.6683
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 11 15    16 46 01.4 -26 54 04   0.2111  0.7969    21.7   152.7    34.2
...
2018 11 30    16 53 52.4 -28 11 35   0.08664 0.9010     9.7   169.4
...
2018 12 08    17 06 39.6 -30 44 46   0.02695 0.9585     8.4   171.4
...
2018 12 14    04 24 51.2 +21 57 19   0.01740 1.0013   166.4    13.4    21.1
2018 12 15    04 32 26.5 +23 41 42   0.02470 1.0084   167.2    12.5    21.8
2018 12 16    04 36 41.9 +24 37 52   0.03203 1.0154   167.2    12.4    22.4
...
2018 12 22    04 45 50.3 +26 24 56   0.07662 1.0572   163.1    15.7    24.5
...
2018 12 30    04 50 40.3 +26 55 03   0.1382  1.1112   156.2    20.9    26.1
...
2019 01 14    05 00 52.5 +27 06 00   0.2641  1.2058   143.4    29.1    27.9

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-X118



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