[Iaude] MPEC X121: 2018 XD4 [a=1.69,e=0.58,i=3.9,H=25.3]

[mpec at mpcdb1.cfa.harvard.edu]

M.P.E.C. 2018-X121                               Issued 2018 Dec. 15, 04:07 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 XD4
 
Observations:
     K18X04D* C2018 12 13.39163 04 05 19.189+01 23 03.60         21.4 wUEX121F51
     K18X04D  C2018 12 13.40353 04 05 23.840+01 24 13.78         21.0 wUEX121F51
     K18X04D  C2018 12 13.41542 04 05 28.528+01 25 24.12         21.3 wUEX121F51
     K18X04D  C2018 12 13.42728 04 05 33.181+01 26 33.94         21.2 wUEX121F51
     K18X04D ^C2018 12 14.36954204 11 44.256+02 50 33.16         21.35GVEX121568
     K18X04D ^C2018 12 14.37054804 11 44.572+02 50 38.03         21.42GVEX121568
     K18X04D ^C2018 12 14.37160904 11 44.915+02 50 43.22         21.28GVEX121568
     K18X04D ^C2018 12 14.37261604 11 45.238+02 50 48.13         21.26GVEX121568
     K18X04D KC2018 12 14.91221304 14 47.45 +03 31 43.6          21.4 GVEX121L01
     K18X04D KC2018 12 14.91415304 14 47.99 +03 31 51.5          21.5 GVEX121L01
     K18X04D KC2018 12 14.91824904 14 49.19 +03 32 09.8          21.4 GVEX121L01
 
Observer details:
568 Mauna Kea.  Observers R. Wainscoat, C. Wipper, A. Petric.  Measurers
    R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
    M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, J. Fairlamb,
    H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
    R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
 
Orbital elements:
2018 XD4                                                 Earth MOID = 0.0167 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M  84.88561              (2000.0)            P               Q
n   0.44846324     Peri.  118.28645     +0.99478416     +0.08463494
a   1.6903818      Node   236.91129     -0.09959216     +0.92652179
e   0.5806342      Incl.    3.89646     +0.02204268     +0.36659827
P   2.20           H   25.3           G   0.15           U   8
Residuals in seconds of arc
181213 F51  0.1+  0.1+    181214 568  0.0   0.0     181214 L01  0.4+  0.2+
181213 F51  0.3-  0.2-    181214 568  0.1-  0.0     181214 L01  0.1-  0.4-
181213 F51  0.1+  0.0     181214 568  0.0   0.1+    181214 L01  0.2-  0.0
181213 F51  0.1+  0.0     181214 568  0.0   0.1+

Ephemeris:
2018 XD4                 a,e,i = 1.69, 0.58, 4                   q = 0.7089
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 11 15    17 28 08.3 -20 02 55   0.2111  0.8141    30.4   142.1    28.6
...
2018 11 30    18 51 53.5 -31 41 56   0.06135 0.9365    34.7   143.2    26.4
...
2018 12 08    02 36 31.5 -17 43 07   0.03934 1.0093   126.9    51.3    20.2
...
2018 12 14    04 09 27.3 +02 19 56   0.09032 1.0653   152.5    25.3    21.4
2018 12 15    04 15 15.3 +03 39 00   0.09988 1.0747   153.7    24.0    21.6
2018 12 16    04 20 05.6 +04 44 50   0.1096  1.0841   154.5    23.0    21.8
...
2018 12 22    04 38 07.9 +08 47 39   0.1699  1.1407   155.7    20.8    22.8
...
2018 12 30    04 50 30.2 +11 26 33   0.2556  1.2159   152.6    21.9    23.8
...
2019 01 14    05 06 02.7 +14 06 42   0.4334  1.3538   142.6    26.2    25.3

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-X121