[Iaude] MPEC X26: 2018 XU3 [a=1.59,e=0.40,i=13.2,H=25.5]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun Dec 6 03:41:21 EST 2020


M.P.E.C. 2020-X26                              Issued 2020 December 6, 08:40 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 XU3                                    


                           Revision to MPEC 2018-X111                           

Additional Observations:
     K18X03U  C2020 12 02.51519103 36 38.236-00 05 52.97         21.45GVEX026F51
     K18X03U KC2020 12 05.42601503 25 49.123+06 09 58.67         20.85GVEX026F52
     K18X03U  C2020 12 06.31350203 21 36.79 +08 37 09.3                VEX026G96
     K18X03U  C2020 12 06.31863503 21 35.02 +08 38 05.7          20.80GVEX026G96
     K18X03U  C2020 12 06.32377003 21 33.21 +08 39 00.4          21.00GVEX026G96
     K18X03U  C2020 12 06.32892303 21 31.46 +08 39 55.2          20.15GVEX026G96

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
    Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
    Lowe, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y.
    Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer T. A. Pruyne.  Measurers 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, T. A. Pruyne, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
201202 F51    8+    2+    201206 G96   10+    4+    MPO477910   +0.96 days

Orbital elements:
2018 XU3                                                 Earth MOID = 0.0371 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 345.43899              (2000.0)            P               Q
n   0.49341205     Peri.   44.83971     -0.48636256     -0.84514047
a   1.5860963      Node    75.45979     +0.72356757     -0.53185938
e   0.4019645      Incl.   13.24553     +0.48979734     -0.05350882
P   2.00           H   25.5           G   0.15           U   3
Residuals in seconds of arc
181212 G96  0.1+  0.2-    181212 F51  0.4-  0.6+    181214 I52  0.2-  0.0
181212 G96  0.8-  0.1+    181212 L01  0.2-  0.2-    201202 F51  0.1-  0.1-
181212 G96 (0.7-  1.5+)   181212 L01  0.6+  0.5-    201205 F52  0.2+  0.1-
181212 G96  0.3-  0.1+    181213 I52  0.2+  0.3-    201206 G96 (0.5+  2.5-)
181212 H01  0.1+  0.0     181213 I52  0.1+  0.2-    201206 G96  0.4+  0.3-
181212 H01  0.2+  0.0     181213 I52  0.2-  0.3+    201206 G96  0.3-  0.2+
181212 H01  0.2+  0.1-    181213 I52  0.4+  0.0     201206 G96  0.1-  0.5+
181212 H01  0.3+  0.1+    181214 I52  0.4-  0.1-
181212 F51  0.5+  0.5-    181214 I52  0.2-  0.2+

Ephemeris:
2018 XU3                 a,e,i = 1.59, 0.40, 13                  q = 0.9485
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 06    04 07 01.6 -13 18 38   0.2512  1.2044   144.4    28.6    24.2
...
2020 11 21    03 58 32.5 -10 51 02   0.1517  1.1208   149.1    26.9    22.9
...
2020 11 29    03 45 55.1 -05 04 15   0.1045  1.0799   152.1    25.3    21.9
...
2020 12 05    03 27 42.5 +05 05 43   0.07290 1.0516   154.3    24.0    21.0
2020 12 06    03 23 12.8 +07 43 45   0.06816 1.0471   154.3    24.1    20.9
2020 12 07    03 18 03.0 +10 45 16   0.06365 1.0427   154.0    24.5    20.7
...
2020 12 13    02 18 25.5 +39 44 17   0.04439 1.0180   138.1    40.2    20.4
...
2020 12 21    20 14 15.2 +68 01 11   0.05446 0.9899    94.9    82.0    22.0
...
2021 01 05    17 04 44.9 +45 53 55   0.1238  0.9558    73.6    99.2    24.5

A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-X26




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