[Iaude] MPEC X167: 2021 XF4 [a=1.21,e=0.08,i=10.2,H=24.1]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 06:48:29 EST 2021


M.P.E.C. 2021-X167                             Issued 2021 December 9, 11:45 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 XF4                                    


Observations:
     K21X04F* C2021 12 06.26463004 34 39.96 -14 47 03.2          21.14GVEX167G96
     K21X04F  C2021 12 06.27023704 34 39.33 -14 46 45.8          21.24GVEX167G96
     K21X04F  C2021 12 06.27583604 34 38.66 -14 46 28.1          21.99GVEX167G96
     K21X04F  C2021 12 06.28143704 34 38.00 -14 46 09.9          21.30GVEX167G96
     K21X04F  C2021 12 06.31231304 34 34.20 -14 44 32.1          21.4 GVEX167H01
     K21X04F  C2021 12 06.31811704 34 33.50 -14 44 12.9          21.5 GVEX167H01
     K21X04F  C2021 12 06.41089 04 34 22.93 -14 39 10.8          21.3 GVEX167I52
     K21X04F  C2021 12 06.41745 04 34 22.24 -14 38 49.1          21.6 GVEX167I52
     K21X04F KC2021 12 07.52190004 32 37.13 -13 37 08.8          21.4 GVEX167474
     K21X04F KC2021 12 07.52483904 32 36.79 -13 36 58.8          21.3 GVEX167474
     K21X04F KC2021 12 07.52777704 32 36.45 -13 36 48.4          21.5 GVEX167474
     K21X04F KC2021 12 07.53071504 32 36.12 -13 36 39.2          21.5 GVEX167474
     K21X04F KC2021 12 09.31342204 29 44.39 -11 54 59.2          21.48GVEX167V06
     K21X04F KC2021 12 09.31704704 29 43.97 -11 54 46.5          21.36GVEX167V06
     K21X04F KC2021 12 09.32067104 29 43.55 -11 54 33.4          21.01GVEX167V06

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.
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, D. Rankin, R. L.
    Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer D. C. Fuls.  Measurers
    E. J. Christensen, B. Gray, D. Rankin, F. C. Shelly.
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 XF4                                                 Earth MOID = 0.1321 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  28.54954              (2000.0)            P               Q                  
n   0.74052193     Peri.  338.63189     +0.18770494     -0.96671278             
a   1.2099779      Node   100.22000     +0.92484358     +0.11432803             
e   0.0818494      Incl.   10.17646     +0.33080389     +0.22890063             
P   1.33           H   24.16          G   0.15           U   8                  
Residuals in seconds of arc
211206 G96  0.6-  0.5+    211206 H01  0.1+  0.2+    211207 474  0.0   0.5+
211206 G96  0.1-  0.1+    211206 I52  0.3-  0.2-    211207 474  0.1+  0.2-
211206 G96  0.3-  0.1-    211206 I52  0.3+  0.0     211209 V06  0.1-  0.1+
211206 G96  0.2-  0.1+    211207 474  0.1+  0.1-    211209 V06  0.1-  0.1-
211206 H01  0.3+  0.3-    211207 474  0.1+  0.0     211209 V06  0.1-  0.0

Ephemeris:
2021 XF4                 a,e,i = 1.21, 0.08, 10                  q = 1.1109
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 09    05 05 51.4 -27 04 39   0.2031  1.1222   126.0    45.6    22.7
...
2021 11 24    04 53 07.2 -23 04 24   0.1720  1.1146   134.4    39.3    22.1
...
2021 12 02    04 41 30.9 -18 15 09   0.1590  1.1122   139.8    34.9    21.8
...
2021 12 08    04 31 51.3 -13 10 43   0.1521  1.1112   143.6    31.8    21.7
2021 12 09    04 30 15.2 -12 12 53   0.1513  1.1111   144.1    31.3    21.6
2021 12 10    04 28 40.0 -11 13 11   0.1505  1.1110   144.6    30.9    21.6
...
2021 12 16    04 19 44.4 -04 41 05   0.1481  1.1110   146.7    29.1    21.5
...
2021 12 24    04 10 29.5 +04 55 53   0.1511  1.1120   146.0    29.7    21.6
...
2022 01 08    04 05 52.1 +21 54 50   0.1760  1.1173   136.3    37.4    22.1

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X167




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