[Iaude] MPEC X25: 2002 XW4 [a=2.43,e=0.50,i=7.0,H=21.8]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Wed Dec 1 10:45:41 EST 2021


M.P.E.C. 2021-X25                              Issued 2021 December 1, 15:44 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

                                    2002 XW4                                    


                           Revision to MPEC 2002-X38                            

Additional Observations:
     K02X04W  C2021 11 28.48328507 14 22.91 +22 30 19.0          20.30GVEX025G96
     K02X04W  C2021 11 28.48845807 14 23.10 +22 30 25.1          20.58GVEX025G96
     K02X04W  C2021 11 28.49449907 14 23.31 +22 30 33.0          20.44GVEX025G96
     K02X04W  C2021 11 28.50054807 14 23.51 +22 30 40.6          21.31GVEX025G96
     K02X04W HC2021 11 28.53646007 14 24.67 +22 31 24.5          20.85GVEX025G96
     K02X04W HC2021 11 28.54037507 14 24.80 +22 31 29.0          20.89GVEX025G96
     K02X04W HC2021 11 28.54390507 14 24.88 +22 31 32.9                VEX025G96
     K02X04W mC2021 11 29.30712607 14 56.54 +22 47 38.5          21.44GVEX025I52
     K02X04W KC2021 11 29.30743807 14 55.99 +22 47 37.2          20.9 VuEX025H21
     K02X04W KC2021 11 29.31527707 14 56.21 +22 47 47.5          20.9 VuEX025H21
     K02X04W mC2021 11 29.31548207 14 56.86 +22 47 49.6          21.07GVEX025I52
     K02X04W mC2021 11 29.31904707 14 56.92 +22 47 53.6          22.17GVEX025I52
     K02X04W KC2021 11 30.29804307 15 31.04 +23 08 31.0                VEX025I52
     K02X04W KC2021 11 30.30185107 15 31.18 +23 08 35.8          21.21GVEX025I52
     K02X04W KC2021 11 30.30591507 15 31.28 +23 08 41.0          21.16GVEX025I52
     K02X04W mC2021 12 01.40606707 16 03.42 +23 31 53.3          20.61GVEX025I52
     K02X04W mC2021 12 01.42779607 16 03.82 +23 32 21.0          20.83GVEX025I52
     K02X04W mC2021 12 01.43484107 16 03.91 +23 32 30.2          20.70GVEX025I52

Observer details:
G96 Mt. Lemmon Survey.  Observer G. J. Leonard.  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.  0.81-m f/4.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observers K. W. Wierzchos, 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, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
211128 G96   46-    7-    211201 I52   46-    8-    MPO 74242   -56.5 days

Orbital elements:
2002 XW4                                                 Earth MOID = 0.2290 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5                 Veres                   
M  22.91357              (2000.0)            P               Q                  
n   0.25944943     Peri.  329.74974     +0.69268138     -0.71150278             
a   2.4346371      Node    76.11808     +0.68371924     +0.59562965             
e   0.5031910      Incl.    6.98971     +0.22960947     +0.37281245             
P   3.80           H   21.80          G   0.15           U   1                  
Residuals in seconds of arc
021128 608  0.5-  0.2-    021206 704  0.5-  0.9-    211128 G96  0.1+  0.4+
021128 608  0.1-  0.1-    021206 704  0.6+  0.1-    211128 G96  0.2+  0.5+
021128 608  0.2+  0.1-    021206 704  0.1-  0.6-    211128 G96  0.0   0.1+
021128 608  0.1-  0.5-    021206 704  0.2+  0.8-    211128 G96  0.0   0.2-
021128 608  0.1-  0.1-    021210 649  0.2+  0.1-    211128 G96  0.5-  0.7-
021128 608  0.1+  0.0     021210 649  0.2+  0.1-    211129 I52  0.4-  0.2+
021205 704  1.0+  0.3+    021210 649  0.2+  0.1-    211129 H21  0.2-  0.3-
021205 704  1.7+  0.5+    021212 246  0.4-  0.2+    211129 H21  0.2-  0.0
021205 704  1.1+  0.2-    021212 246  1.5-  1.5+    211129 I52  0.6+  0.4+
021205 704  0.2-  0.1-    021212 246  1.6-  1.1+    211129 I52  0.0   0.2-
021205 704  0.2+  0.0     021212 246  1.3-  0.9+    211130 I52  0.4-  0.1+
021206 858  1.1-  0.0     021212 246  1.1-  0.4+    211130 I52  0.1+  0.0
021206 858  1.3+  0.3-    021212 246  1.6-  0.2+    211130 I52  0.1+  0.1-
021206 858 (1.7+  0.7+)   021228 696  0.4-  0.6-    211201 I52  0.2+  0.3-
021206 926  0.2-  0.5-    021228 696  0.5+  0.2+    211201 I52  0.3+  0.1-
021206 926  0.2-  0.7+    211128 G96  0.6-  0.3+    211201 I52  0.0   0.2+
021206 926  0.3+  0.8+    211128 G96  0.3-  0.0

Ephemeris:
2002 XW4                 a,e,i = 2.43, 0.50, 7                   q = 1.2095
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 11 01    06 28 33.5 +13 37 10   0.3525  1.2122   121.0    44.6    21.7
...
2021 11 16    07 00 04.4 +18 13 56   0.3431  1.2344   129.1    38.4    21.5
...
2021 11 24    07 10 35.2 +20 56 30   0.3440  1.2549   135.1    33.7    21.4
...
2021 11 30    07 15 20.1 +23 02 19   0.3478  1.2738   140.4    29.6    21.3
2021 12 01    07 15 51.7 +23 23 23   0.3488  1.2772   141.3    28.8    21.3
2021 12 02    07 16 18.9 +23 44 26   0.3498  1.2807   142.3    28.1    21.3
...
2021 12 08    07 17 31.7 +25 49 15   0.3581  1.3033   148.2    23.5    21.3
...
2021 12 16    07 15 38.2 +28 25 25   0.3757  1.3372   156.5    17.0    21.2
...
2021 12 31    07 05 27.3 +32 12 10   0.4324  1.4106   169.3     7.4    21.3

A. U. Tomatic                (C) Copyright 2021 MPC           M.P.E.C. 2021-X25




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