[Iaude] MPEC X180: 2021 XX4 [a=1.83,e=0.56,i=0.7,H=28.6]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 21:26:21 EST 2021


M.P.E.C. 2021-X180                            Issued 2021 December 10, 02:25 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 XX4                                    


Observations:
     K21X04X* C2021 12 08.26759004 14 34.38 +27 21 00.8          21.75GVEX180G96
     K21X04X  C2021 12 08.27322304 14 34.56 +27 21 31.0          21.14GVEX180G96
     K21X04X  C2021 12 08.27882904 14 34.71 +27 22 01.7          21.74GVEX180G96
     K21X04X  C2021 12 08.28445604 14 34.87 +27 22 31.6          20.88GVEX180G96
     K21X04X KC2021 12 08.35013204 14 37.20 +27 28 23.7          20.94GVEX180V06
     K21X04X KC2021 12 08.35229404 14 37.33 +27 28 34.9          21.29GVEX180V06
     K21X04X KC2021 12 08.35661204 14 37.55 +27 28 57.6          20.95GVEX180V06
     K21X04X mC2021 12 09.26600304 18 30.79 +29 28 46.1          20.54GVEX180G96
     K21X04X mC2021 12 09.26711204 18 30.95 +29 28 56.7          20.47GVEX180G96
     K21X04X mC2021 12 09.26822104 18 31.15 +29 29 10.4          20.08GVEX180G96
     K21X04X mC2021 12 09.26933004 18 31.25 +29 29 21.6                VEX180G96
     K21X04X mC2021 12 09.29304104 18 34.96 +29 33 39.9          20.35GVEX180G96
     K21X04X mC2021 12 09.29414904 18 35.11 +29 33 52.7          20.44GVEX180G96
     K21X04X mC2021 12 09.29525904 18 35.28 +29 34 03.6          20.43GVEX180G96
     K21X04X mC2021 12 09.29636604 18 35.45 +29 34 15.2          20.25GVEX180G96
     K21X04X KC2021 12 09.96623 04 24 14.44 +32 23 58.5                VEX180204
     K21X04X KC2021 12 09.97501 04 24 18.86 +32 27 03.5                VEX180204
     K21X04X KC2021 12 09.98379 04 24 23.29 +32 30 09.9          19.7 GVEX180204

Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector +
    CCD.
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.  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 XX4                                                 Earth MOID = 0.0021 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M 359.69145              (2000.0)            P               Q                  
n   0.39780168     Peri.  231.65786     -0.77330960     -0.63389728             
a   1.8310139      Node   269.00007     +0.58566212     -0.70637377             
e   0.5620620      Incl.    0.73946     +0.24288300     -0.31497672             
P   2.48           H   28.67          G   0.15           U   8                  
Residuals in seconds of arc
211208 G96  0.1-  0.2+    211208 V06  0.2+  0.0     211209 G96  0.1-  0.6+
211208 G96  0.1+  0.2-    211209 G96  0.2-  0.8+    211209 G96  0.1-  0.5-
211208 G96  0.1+  0.1+    211209 G96  0.3-  0.7-    211209 G96  0.2-  1.0-
211208 G96  0.0   0.4-    211209 G96  0.2+  0.9+    211209 204  0.0   0.2+
211208 V06  0.3-  0.3+    211209 G96  0.7-  0.1+    211209 204  0.3+  0.1-
211208 V06  0.1+  0.1+    211209 G96  0.2+  0.0     211209 204  0.2-  0.1-

Ephemeris:
2021 XX4                 a,e,i = 1.83, 0.56, 1                   q = 0.8019
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 10    04 06 30.8 +22 32 34   0.2668  1.2484   163.5    13.0    27.0
...
2021 11 25    04 08 26.5 +23 13 55   0.1324  1.1194   177.1     2.6    24.8
...
2021 12 03    04 09 29.4 +24 14 00   0.06751 1.0529   173.4     6.2    23.4
...
2021 12 09    04 17 08.1 +28 45 44   0.02061 1.0052   168.1    11.6    21.0
2021 12 10    04 24 44.8 +32 38 30   0.01293 0.9974   166.5    13.3    20.0
2021 12 11    05 01 33.8 +46 54 48   0.0055200.9898   156.0    23.9    18.5
...
2021 12 17    16 01 24.9 -19 39 52   0.04183 0.9456    22.7   156.3    31.5
...
2021 12 25    16 06 55.1 -21 41 31   0.1053  0.8931    29.2   147.5    31.5
...
2022 01 09    16 20 49.6 -22 48 13   0.2327  0.8226    41.2   128.1    30.6

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X180




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