[Iaude] MPEC X135: 2020 XA4 [a=2.65,e=0.52,i=17.3,H=21.1]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sat Dec 12 09:20:31 EST 2020


M.P.E.C. 2020-X135                            Issued 2020 December 12, 14:19 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 XA4                                    


Observations:
     K20X04A* C2020 12 09.33641005 41 04.33 -15 14 24.9          20.98GVEX135G96
     K20X04A  C2020 12 09.34152405 41 04.21 -15 14 22.5          21.27GVEX135G96
     K20X04A  C2020 12 09.34664405 41 04.12 -15 14 20.3          22.06GVEX135G96
     K20X04A KC2020 12 09.41296605 41 02.77 -15 13 56.1          21.16GVEX135I52
     K20X04A KC2020 12 09.41933005 41 02.64 -15 13 52.9          21.03GVEX135I52
     K20X04A KC2020 12 09.42569205 41 02.52 -15 13 50.8          20.48GVEX135I52
     K20X04A KC2020 12 09.59516205 41 00.43 -15 12 26.0          21.3 GVEX135474
     K20X04A KC2020 12 09.59868305 41 00.37 -15 12 25.1          20.9 GVEX135474
     K20X04A KC2020 12 09.60220205 41 00.28 -15 12 23.2          21.6 GVEX135474
     K20X04A KC2020 12 09.60572105 41 00.22 -15 12 21.8          21.3 GVEX135474
     K20X04A  C2020 12 10.44114505 40 48.205-15 07 00.46         21.36wUEX135F51
     K20X04A  C2020 12 10.45315205 40 47.931-15 06 55.29         21.45wUEX135F51
     K20X04A  C2020 12 10.46516705 40 47.664-15 06 50.07         21.97wUEX135F51
     K20X04A  C2020 12 10.47719205 40 47.386-15 06 44.63         21.77wUEX135F51
     K20X04A HC2020 12 12.25309405 40 19.09 -14 52 13.3          20.64GVEX135V06
     K20X04A HC2020 12 12.25458005 40 19.02 -14 52 12.6                VEX135V06
     K20X04A HC2020 12 12.25933305 40 18.95 -14 52 11.0                VEX135V06
     K20X04A HC2020 12 12.26082005 40 18.91 -14 52 10.0          21.11GVEX135V06

Observer details:
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M.
    Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, 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.
G96 Mt. Lemmon Survey.  Observer K. W. Wierzchos.  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.
I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  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.  1.0-m reflector +
    CCD.
V06 Catalina Sky Survey-Kuiper.  Observer D. C. Fuls.  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.  1.55-m reflector +
    1K CCD.

Orbital elements:
2020 XA4                                                 Earth MOID = 0.2890 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 349.17532              (2000.0)            P               Q
n   0.22894264     Peri.  355.78230     -0.52449101     -0.81641061
a   2.6463763      Node   125.66991     +0.78960224     -0.57257328
e   0.5190141      Incl.   17.30304     +0.31849252     +0.07505707
P   4.31           H   21.1           G   0.15           U   8
Residuals in seconds of arc
201209 G96  0.2+  0.4-    201209 474  0.1+  0.0     201210 F51  0.0   0.1-
201209 G96  0.1-  0.1+    201209 474  0.2+  0.5-    201210 F51  0.1-  0.1+
201209 G96  0.2+  0.5+    201209 474  0.1-  0.1+    201212 V06  0.2+  0.5+
201209 I52  0.1+  0.3-    201209 474  0.0   0.1+    201212 V06  0.3-  0.4+
201209 I52  0.0   0.4+    201210 F51  0.0   0.0     201212 V06  0.3+  0.5-
201209 I52  0.1+  0.1+    201210 F51  0.1-  0.1-    201212 V06  0.2+  0.3-

Ephemeris:
2020 XA4                 a,e,i = 2.65, 0.52, 17                  q = 1.2729
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 12    05 37 38.7 -13 29 31   0.6944  1.5429   131.9    28.5    22.5
...
2020 11 27    05 42 08.9 -15 23 23   0.5757  1.4629   137.3    27.2    21.9
...
2020 12 05    05 41 53.1 -15 31 43   0.5217  1.4241   139.7    26.6    21.7
...
2020 12 11    05 40 39.4 -15 02 38   0.4855  1.3971   141.4    26.1    21.4
2020 12 12    05 40 23.0 -14 54 18   0.4798  1.3928   141.6    26.0    21.4
2020 12 13    05 40 05.6 -14 44 53   0.4742  1.3886   141.8    26.0    21.4
...
2020 12 19    05 38 07.4 -13 23 58   0.4431  1.3645   143.1    25.6    21.2
...
2020 12 27    05 35 28.2 -10 24 36   0.4081  1.3361   144.3    25.5    21.0
...
2021 01 11    05 34 06.7 -00 54 50   0.3650  1.2961   143.8    26.6    20.7

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-X135




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