[Iaude] MPEC X168: 2021 XG4 [a=1.09,e=0.59,i=6.0,H=24.9]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 06:49:28 EST 2021


M.P.E.C. 2021-X168                             Issued 2021 December 9, 11:48 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

                                    2021 XG4                                    


Observations:
     K21X04G* C2021 12 07.40844308 20 13.06 +23 02 30.5          20.82GVEX168G96
     K21X04G  C2021 12 07.41363008 20 16.94 +23 02 40.5          21.41GVEX168G96
     K21X04G  C2021 12 07.41883008 20 20.84 +23 02 49.4          20.48GVEX168G96
     K21X04G  C2021 12 07.42402608 20 24.67 +23 02 59.2          22.42GVEX168G96
     K21X04G  C2021 12 07.43591 08 20 33.45 +23 03 22.3          20.5 GVEX168G96
     K21X04G  C2021 12 07.43715 08 20 34.38 +23 03 23.7          20.5 GVEX168G96
     K21X04G  C2021 12 07.43840 08 20 35.35 +23 03 26.0                VEX168G96
     K21X04G KC2021 12 07.44424708 20 39.63 +23 03 36.5          21.75GVEX168V06
     K21X04G KC2021 12 07.44623508 20 41.11 +23 03 40.3          21.19GVEX168V06
     K21X04G KC2021 12 07.44822408 20 42.59 +23 03 43.7          22.62GVEX168V06
     K21X04G KC2021 12 08.39002608 34 19.27 +23 33 13.1          21.63GVEX168V06
     K21X04G KC2021 12 08.39202308 34 21.14 +23 33 17.5          20.98GVEX168V06
     K21X04G KC2021 12 08.39401908 34 22.95 +23 33 21.3          21.09GVEX168V06
     K21X04G KC2021 12 09.39956808 52 34.69 +24 06 11.6          21.03GVEX168G96
     K21X04G KC2021 12 09.40081208 52 36.17 +24 06 14.4          21.44GVEX168G96
     K21X04G KC2021 12 09.40205508 52 37.65 +24 06 15.8          21.49GVEX168G96
     K21X04G KC2021 12 09.40329608 52 39.13 +24 06 18.9          20.46GVEX168G96

Observer details:
G96 Mt. Lemmon Survey.  Observer R. A. Kowalski.  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, D. Rankin, R. L. Seaman, F. C.
    Shelly, K. W. Wierzchos, B. Gray.  1.5-m reflector + 10K CCD.
V06 Catalina Sky Survey-Kuiper.  Observer H. Groeller.  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, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.  1.55-m reflector + 1K CCD.

Orbital elements:
2021 XG4                                                 Earth MOID = 0.0153 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 345.25271              (2000.0)            P               Q                  
n   0.86691511     Peri.  126.40802     -0.91972339     +0.37930064             
a   1.0893104      Node    76.07689     -0.38522598     -0.82240729             
e   0.5860824      Incl.    5.98428     -0.07556346     -0.42400151             
P   1.14           H   24.93          G   0.15           U   9                  
Residuals in seconds of arc
211207 G96  0.7-  0.5-    211207 G96  0.7+  0.1+    211208 V06  0.2-  0.0
211207 G96  0.1-  0.1-    211207 V06  0.1-  0.0     211209 G96  0.1-  0.2+
211207 G96  0.6+  0.7-    211207 V06  0.1-  0.2+    211209 G96  0.1-  0.5+
211207 G96  0.5+  0.4-    211207 V06  0.1-  0.0     211209 G96  0.0   0.6-
211207 G96  0.0   0.9+    211208 V06  0.1-  0.2-    211209 G96  0.1+  0.1-
211207 G96  0.2+  0.1+    211208 V06  0.3+  0.1+

Ephemeris:
2021 XG4                 a,e,i = 1.09, 0.59, 6                   q = 0.4509
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 09    06 40 07.2 +18 50 01   0.4414  1.3042   126.9    37.4    25.2
...
2021 11 24    07 07 51.3 +19 38 07   0.2527  1.1811   135.6    35.8    23.8
...
2021 12 02    07 36 03.1 +21 01 04   0.1585  1.1079   137.4    37.1    22.7
...
2021 12 08    08 28 18.3 +23 21 01   0.09264 1.0493   132.0    44.3    21.6
2021 12 09    08 44 45.5 +23 53 25   0.08251 1.0393   129.4    47.1    21.4
2021 12 10    09 05 45.2 +24 25 25   0.07284 1.0291   125.8    50.9    21.2
...
2021 12 16    13 52 47.6 +13 33 34   0.04436 0.9665    65.4   112.2    22.4
...
2021 12 24    17 10 30.8 -08 27 35   0.1132  0.8785    20.5   156.9    29.9
...
2022 01 08    18 06 06.8 -14 47 43   0.3015  0.7029    18.0   154.4    30.9

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X168




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