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  • MPEC 1998-W33 : 1994 AB1

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    M.P.E.C. 1998-W33                                Issued 1998 Nov. 24, 22:52 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.
    
                 BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
                       URL http://cfa-www.harvard.edu/iau/mpc.html
    
                                       1994 AB1
    
                               Revision to MPEC 1994-B12
    
    Observations:
         J94A01B  C1995 03 28.75934 13 54 17.15 -07 21 13.0                      413
         J94A01B  C1995 03 28.76622 13 54 16.85 -07 21 11.2                      413
         J94A01B  C1998 11 24.18912 11 02 08.74 +10 45 20.7                      557
         J94A01B  C1998 11 24.19432 11 02 09.17 +10 45 18.4                      557
         J94A01B  C1998 11 24.21181 11 02 10.81 +10 45 11.7          20.0 V      557
    
    Observer details:
    413 Siding Spring.  Observers R. H. McNaught, G. J. Garradd.  1.0-m reflector
        + CCD.
    557 Ondrejov.  Observers P. Pravec, L. Sarounova.  0.65-m f/3.6 reflector
        + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    950328 413 52.5- 26.1+    981124 557 0.11- 0.05+    MPC 23350   +0.44 day
    
    Orbital elements:
    1994 AB1
    Id. R. H. McNaught (1995 observations), P. Pravec (1998 observations)
    Epoch 1999 Jan. 22.0 TT = JDT 2451200.5                 Williams
    M  32.40964              (2000.0)            P               Q
    n   0.20499114     Peri.  342.35496     +0.64901957     -0.75729501
    a   2.8486952      Node    67.11180     +0.70715797     +0.56531067
    e   0.5901231      Incl.    4.52291     +0.28053735     +0.32699864
    P   4.81           H   16.2           G   0.15           U   3
    Residuals in seconds of arc
    931222 372 (2.4-  1.5+)   940130 360  0.3-  0.2-    940304 360  0.7+  0.3+
    931222 372 (3.3-  2.3+)   940130 360  0.0   0.1-    940304 360  0.6+  0.8+
    931225 372  1.0-  0.5-    940130 587  0.3-  0.6+    940305 658  0.2+  0.3+
    931225 372  0.8+  1.5+    940130 587  0.6-  0.6-    940305 658  0.0   0.0
    940104 896  1.0-  1.5-    940130 587  1.0-  1.0-    940305 658  0.3+  0.1+
    940104 896  0.4+  0.1-    940203 360  0.1-  0.2-    940305 658  0.3+  0.1+
    940107 896  1.0+  1.1+ Y  940203 360  0.4-  0.4-    940306 658  0.6+  0.0
    940107 896  0.4+  0.7+ Y  940207 801  0.3+  0.0     940306 658  0.2+  0.4+
    940114 896  1.7+  0.1-    940207 801  0.7-  0.7-    940306 658  0.1-  0.6+
    940114 896  0.3+  0.1+    940209 104  0.2-  1.0-    950328 413  0.0   0.0
    940119 896  0.6-  0.4+    940209 104  0.2-  0.4-    950328 413  0.1+  0.1+
    940119 896  0.5+  0.1-    940209 104  0.2-  0.3+    981124 557  0.3+  0.2+
    940129 385  0.2-  0.3-    940209 104  0.1-  0.4+    981124 557  0.4-  0.1-
    940129 385  0.0   0.1-    940209 104  0.1-  0.4+    981124 557  0.1+  0.1-
    940129 385  0.2-  0.6-    940210 587  0.5-  0.5+
    940130 360  0.3-  0.4-    940210 587  0.1-  0.3+
    
    Ephemeris:
    1994 AB1                 a,e,i = 2.85, 0.59, 5                   q = 1.1676
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    1998 11 23    11 00.27   +10 53.2    1.503    1.625    78.5    36.5    19.6
    1998 12 03    11 14.74   +09 55.2    1.473    1.698    84.9    35.3    19.6
    1998 12 13    11 26.22   +09 15.8    1.436    1.772    92.2    33.7    19.6
    1998 12 23    11 34.43   +08 57.4    1.396    1.846   100.3    31.6    19.6
    1999 01 02    11 39.08   +09 02.0    1.355    1.921   109.4    28.9    19.5
    1999 01 12    11 39.95   +09 30.3    1.318    1.995   119.5    25.4    19.5
    1999 01 22    11 36.88   +10 21.0    1.289    2.069   130.6    21.2    19.4
    1999 02 01    11 30.06   +11 29.7    1.275    2.142   142.4    16.3    19.3
    1999 02 11    11 20.17   +12 48.3    1.281    2.214   154.8    10.9    19.1
    1999 02 21    11 08.32   +14 06.5    1.311    2.285   166.7     5.7    19.0
    1999 03 03    10 56.07   +15 13.8    1.370    2.355   171.8     3.4    19.1
    1999 03 13    10 44.89   +16 02.9    1.457    2.424   162.9     6.9    19.5
    1999 03 23    10 35.89   +16 30.9    1.570    2.492   151.6    11.0    19.8
    1999 04 02    10 29.71   +16 38.4    1.706    2.559   140.7    14.3    20.2
    1999 04 12    10 26.46   +16 28.2    1.861    2.624   130.4    16.9    20.5
    1999 04 22    10 25.94   +16 03.3    2.032    2.688   120.7    18.8    20.8
    1999 05 02    10 27.84   +15 26.7    2.214    2.751   111.7    19.9    21.1
    1999 05 12    10 31.74   +14 40.9    2.403    2.812   103.2    20.5    21.4
    1999 05 22    10 37.29   +13 47.7    2.598    2.873    95.2    20.5    21.6
    1999 06 01    10 44.17   +12 48.4    2.794    2.932    87.6    20.2    21.8
    1999 06 11    10 52.09   +11 44.4    2.989    2.989    80.2    19.6    21.9
    
    Gareth V. Williams           (C) Copyright 1998 MPC           M.P.E.C. 1998-W33
    

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    MPEC number:

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