[Iaude] MPEC X179: 2021 XW4 [a=1.42,e=0.30,i=6.6,H=24.4]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Dec 9 21:24:08 EST 2021


M.P.E.C. 2021-X179                            Issued 2021 December 10, 02:22 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 XW4                                    


Observations:
     K21X04W* C2021 12 08.19684902 31 04.16 +29 44 35.3          20.40GVEX179G96
     K21X04W  C2021 12 08.20250102 31 07.04 +29 44 15.3          20.46GVEX179G96
     K21X04W  C2021 12 08.21377502 31 12.76 +29 43 34.1          20.66GVEX179G96
     K21X04W KC2021 12 08.28560302 31 49.25 +29 39 10.1          21.38GVEX179I52
     K21X04W KC2021 12 08.28728202 31 50.12 +29 39 04.2          20.57GVEX179I52
     K21X04W KC2021 12 08.28896102 31 50.93 +29 38 57.0          20.61GVEX179I52
     K21X04W KC2021 12 08.29064102 31 51.85 +29 38 51.8          20.60GVEX179I52
     K21X04W mC2021 12 09.07474402 38 50.97 +28 52 06.1          20.92GVEX179I52
     K21X04W mC2021 12 09.07539502 38 51.20 +28 52 03.9          20.98GVEX179I52
     K21X04W mC2021 12 09.07604602 38 51.54 +28 52 00.8          20.44GVEX179I52
     K21X04W mC2021 12 09.07669702 38 51.85 +28 51 59.1          20.46GVEX179I52
     K21X04W KC2021 12 09.07831802 38 50.58 +28 51 51.1                uEX179H21
     K21X04W KC2021 12 09.08390902 38 53.28 +28 51 31.9                uEX179H21
     K21X04W KC2021 12 09.08940802 38 55.97 +28 51 12.7          20.9 VuEX179H21
     K21X04W KC2021 12 10.05783302 46 55.87 +27 54 51.6          20.5 VuEX179H21
     K21X04W KC2021 12 10.06069302 46 57.14 +27 54 42.5          20.7 VuEX179H21
     K21X04W KC2021 12 10.06361502 46 58.47 +27 54 32.6          20.9 VuEX179H21

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.  1.5-m reflector + 10K CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD,
    0.81-m f/4.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  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.

Orbital elements:
2021 XW4                                                 Earth MOID = 0.0646 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  51.61723              (2000.0)            P               Q                  
n   0.58470429     Peri.  120.24621     +0.90085187     -0.41875732             
a   1.4163759      Node   264.72001     +0.34822813     +0.85450556             
e   0.3030695      Incl.    6.60242     +0.25923558     +0.30734762             
P   1.69           H   24.40          G   0.15           U   8                  
Residuals in seconds of arc
211208 G96  0.2-  0.3-    211208 I52  0.5+  0.5+    211209 H21  0.3-  0.4+
211208 G96  0.0   0.1+    211209 I52 (1.2+  0.5+)   211209 H21  0.2+  0.3+
211208 G96  0.1-  0.2-    211209 I52  0.1+  0.5+    211210 H21  0.1+  0.5-
211208 I52  0.0   0.0     211209 I52  0.3+  0.4-    211210 H21  0.3-  0.0
211208 I52  0.2+  0.3+    211209 I52  0.2+  0.1+    211210 H21  0.1-  0.1-
211208 I52  0.3-  0.6-    211209 H21  0.4-  0.2+

Ephemeris:
2021 XW4                 a,e,i = 1.42, 0.30, 7                   q = 0.9871
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 10    20 26 57.6 +31 27 07   0.1009  0.9990    92.0    82.2    22.3
...
2021 11 25    23 34 14.0 +39 57 32   0.08003 1.0301   120.5    55.7    21.0
...
2021 12 03    01 34 51.7 +35 00 24   0.08787 1.0532   138.4    38.4    20.8
...
2021 12 09    02 38 08.2 +28 56 48   0.1033  1.0731   147.0    30.0    20.9
2021 12 10    02 46 25.3 +27 58 34   0.1065  1.0766   147.9    29.1    21.0
2021 12 11    02 54 09.8 +27 02 09   0.1099  1.0801   148.7    28.3    21.0
...
2021 12 17    03 31 20.4 +22 09 49   0.1333  1.1024   150.8    25.8    21.4
...
2021 12 25    04 04 28.6 +17 41 54   0.1713  1.1343   149.3    26.3    22.0
...
2022 01 09    04 43 53.6 +13 37 59   0.2598  1.1990   142.1    30.3    23.2

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-X179




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