[Iaude] MPEC X150: 2020 XR4 [a=1.34,e=0.09,i=20.5,H=22.3]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sun Dec 13 17:19:35 EST 2020


M.P.E.C. 2020-X150                            Issued 2020 December 13, 22:18 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

                                    2020 XR4                                    


Observations:
     K20X04R  C2020 11 14.36961303 38 14.888-05 15 23.29         21.54GVEX150F52
     K20X04R  C2020 11 14.39272503 38 10.887-05 14 34.76         22.61GVEX150F52
     K20X04R  C2020 11 14.40432903 38 08.820-05 14 09.24         21.42GVEX150F52
     K20X04R  C2020 11 19.40579203 24 20.907-02 09 08.95         21.45GVEX150F51
     K20X04R  C2020 11 19.41707103 24 18.975-02 08 43.34         21.71GVEX150F51
     K20X04R  C2020 11 19.42834403 24 17.043-02 08 17.15         21.63GVEX150F51
     K20X04R  C2020 11 19.43960603 24 15.121-02 07 51.50         21.80GVEX150F51
     K20X04R* C2020 12 08.25110902 42 39.504+09 52 46.31         22.31wUEX150F51
     K20X04R  C2020 12 08.26338802 42 38.276+09 53 12.77         22.35wUEX150F51
     K20X04R  C2020 12 08.27574502 42 37.046+09 53 39.14         22.73wUEX150F51
     K20X04R |C2020 12 09.10033 02 41 21.86 +10 23 06.7          22.6 GVEX150807
     K20X04R |C2020 12 09.11216 02 41 20.78 +10 23 31.7          22.5 GVEX150807
     K20X04R |C2020 12 09.12399 02 41 19.63 +10 23 56.5          22.5 GVEX150807
     K20X04R |C2020 12 10.06415 02 39 58.96 +10 56 48.4          22.5 GVEX150807
     K20X04R |C2020 12 10.07322 02 39 58.15 +10 57 07.5          22.6 GVEX150807
     K20X04R KC2020 12 10.07773702 39 58.00 +10 56 55.8          22.6 VuEX150H21
     K20X04R |C2020 12 10.08190 02 39 57.37 +10 57 25.4          22.3 GVEX150807
     K20X04R KC2020 12 10.08726802 39 57.14 +10 57 15.5          22.4 VuEX150H21
     K20X04R KC2020 12 10.09335102 39 56.59 +10 57 28.2          22.5 VuEX150H21

Observer details:
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes.
    1.00-m f/10.0 astrograph + CCD.
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, K. Chambers, T. de Boer, L. Denneau, J. Fairlamb, H.
    Flewelling, C.-C. Lin, E. Magnier.  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.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  1.3-m f/4.0
    astrograph + CCD.

Orbital elements:
2020 XR4                                                 Earth MOID = 0.2488 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 115.32291              (2000.0)            P               Q
n   0.63474771     Peri.  236.03574     +0.54412097     +0.77151430
a   1.3409172      Node    70.37296     -0.60674424     +0.63324203
e   0.0853247      Incl.   20.48921     -0.57947718     +0.06140217
P   1.55           H   22.3           G   0.15           U   4
Residuals in seconds of arc
201114 F52  0.2-  0.1+    201208 F51  0.0   0.1-    201210 807  0.1+  0.2+
201114 F52  0.4+  0.5-    201208 F51  0.1-  0.0     201210 H21  0.2-  0.3+
201114 F52  0.1-  0.3+    201208 F51  0.1-  0.1-    201210 807  0.2+  0.0
201119 F51  0.1-  0.1+    201209 807  0.0   0.0     201210 H21  0.3-  0.1+
201119 F51  0.0   0.2-    201209 807  0.7+  0.0     201210 H21  0.3-  0.1+
201119 F51  0.0   0.2+    201209 807  0.4+  0.1-
201119 F51  0.1+  0.0     201210 807  0.1-  0.0

Ephemeris:
2020 XR4                 a,e,i = 1.34, 0.09, 20                  q = 1.2265
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 13    03 42 02.5 -06 03 14   0.3951  1.3580   155.0    18.0    21.9
...
2020 11 28    03 02 32.8 +03 26 35   0.4179  1.3761   154.7    17.8    22.0
...
2020 12 06    02 46 19.9 +08 31 26   0.4507  1.3853   147.1    22.8    22.4
...
2020 12 12    02 37 25.7 +12 02 50   0.4833  1.3920   140.5    26.7    22.6
2020 12 13    02 36 13.7 +12 36 17   0.4893  1.3931   139.5    27.3    22.7
2020 12 14    02 35 06.7 +13 09 14   0.4955  1.3942   138.4    28.0    22.7
...
2020 12 20    02 30 05.8 +16 15 54   0.5356  1.4005   132.1    31.4    23.0
...
2020 12 28    02 27 38.2 +19 57 04   0.5956  1.4086   124.4    35.2    23.4
...
2021 01 12    02 33 57.3 +25 41 12   0.7212  1.4222   112.2    39.8    23.9

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-X150




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