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  • MPEC 2000-B33 : 1998 WZ31

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    M.P.E.C. 2000-B33                                Issued 2000 Jan. 28, 23:47 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets and routine data on comets.  They are published
       on behalf of Commission 20 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
    
                 BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
              URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714
    
                                       1998 WZ31
    
                               Revision to MPEC 1999-B27
    
    Observations:
         J98W31Z 9C1999 11 30.23471 03 42 35.96 +21 55 26.6          22.8 R      695
         J98W31Z 9C1999 11 30.24182 03 42 35.90 +21 55 26.4          22.9 R      695
         J98W31Z 9C1999 11 30.38241 03 42 35.02 +21 55 24.3                      695
         J98W31Z 9C1999 11 30.38950 03 42 34.94 +21 55 24.2                      695
         J98W31Z 9C1999 12 31.25007 03 39 41.45 +21 47 47.4          22.8 R      695
         J98W31Z 9C1999 12 31.26647 03 39 41.39 +21 47 47.2          22.7 R      695
         J98W31Z 9C1999 12 31.37380 03 39 40.90 +21 47 46.4          23.3 R      695
         J98W31Z 9C1999 12 31.38181 03 39 40.79 +21 47 45.3          22.6 R      695
         J98W31Z  C2000 01 03.24931 03 39 28.49 +21 47 11.6          23.3 R      697
         J98W31Z  C2000 01 03.30771 03 39 28.23 +21 47 10.8          23.6 R      697
         J98W31Z  C2000 01 05.12975 03 39 20.73 +21 46 49.6          23.5 R      697
         J98W31Z  C2000 01 05.19913 03 39 20.47 +21 46 49.8          23.4 R      697
    
    Observer details:
    695 Kitt Peak.  Observers J. W. Parker, J. A. Stansberry.  Measurer
        J. W. Parker.  2.1-m reflector + CCD.
    697 Kitt Peak, McGraw-Hill.  Observers R. L. Allen, M. Allen.  Measurer
        R. L. Allen.  2.4-m Hiltner Telescope + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc and reference
    991130 695 20.6+  3.6+    000105 697 23.9+  4.0+    MPC 33766
    
    Orbital elements:
    1998 WZ31
    Epoch 2000 Feb. 26.0 TT = JDT 2451600.5                 Marsden
    M  10.48280              (2000.0)            P               Q
    n   0.00391454     Peri.  353.80452     +0.71247385     -0.67428328
    a  39.8733032      Node    50.53970     +0.65411317     +0.53801559
    e   0.1745989      Incl.   14.57012     +0.25400190     +0.50584709
    P 252              H    8.2           G   0.15           U   6
    Residuals in seconds of arc
    981119 695  0.1+  0.4+    990114 695  0.0   0.4+    991231 695  0.1-  0.5+
    981119 695  0.1-  0.5+    990115 695  0.0   0.7+    991231 695  1.2-  0.5-
    981218 950  0.2+  0.1-    991130 695  0.0   0.2+    000103 697  0.7+  0.1-
    981218 950  0.3-  0.1+    991130 695  0.2-  0.2+    000103 697  0.6+  0.2-
    981218 950  0.1+  0.3-    991130 695  0.3+  0.3+    000105 697  0.0   0.8-
    981219 950  0.4+  0.4-    991130 695  0.2-  0.3+    000105 697  0.3+  0.2+
    981219 950  0.1+  0.3-    991231 695  0.3-  0.1-
    981219 950  0.6-  1.2-    991231 695  0.1-  0.1-
    
    Ephemeris:
    1998 WZ31                a,e,i = 39.87, 0.17, 15                 q = 32.911
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2000 01 27    03 38.34   +21 44.1   32.711   33.077   111.0     1.6    23.6
    2000 02 06    03 38.20   +21 43.8   32.879   33.079   100.9     1.7    23.6
    2000 02 16    03 38.29   +21 44.2   33.052   33.080    90.8     1.7    23.6
    2000 02 26    03 38.59   +21 45.4   33.225   33.081    80.8     1.7    23.6
    2000 03 07    03 39.10   +21 47.2   33.394   33.082    70.9     1.6    23.6
    2000 03 17    03 39.81   +21 49.8   33.554   33.084    61.1     1.5    23.6
    2000 03 27    03 40.70   +21 52.9   33.699   33.085    51.4     1.4    23.6
    2000 04 06    03 41.74   +21 56.6   33.826   33.086    41.8     1.2    23.6
    2000 04 16    03 42.92   +22 00.8   33.932   33.088    32.3     0.9    23.6
    
    Brian G. Marsden             (C) Copyright 2000 MPC           M.P.E.C. 2000-B33
    

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