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IAUC 6464: C/1996 Q1

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                                                  Circular No. 6464
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1996 Q1 (TABUR)
     The improved parabolic orbital elements below are taken from
MPC 27690.  J. Jahn, Bodenteich, Germany, notes the very strong
resemblance to the orbit (MPC 13459) of comet C/1988 A1 (Liller).  As
in the case of comets C/1988 F1 and C/1988 J1, it is certain that
these objects separated from each other in the general vicinity of their
previous perihelion passage, despite the greater temporal separation
(with C/1988 A1 = 1988a = 1988 V having T = 1988 Mar. 31 and original period
2900 years).  The ephemeris uncertainty for comet C/1996 Q1 in early
October is still about 1 deg.

     T = 1996 Nov.  3.562 TT          Peri. =  57.234
                                      Node  =  31.516   2000.0
     q = 0.84202 AU                   Incl. =  73.234

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Aug. 25     4 53.08    - 7 31.1    1.245    1.497   82.5   42.0      9.7
     30     5 01.83    - 5 23.4    1.123    1.432   84.2   44.5      9.3
Sept. 4     5 11.57    - 2 46.7    1.001    1.367   85.7   47.4      8.9
      9     5 22.82    + 0 31.0    0.881    1.303   87.0   50.5      8.4
     14     5 36.41    + 4 48.2    0.765    1.240   87.8   54.1      7.9
     19     5 53.82    +10 32.6    0.654    1.179   88.0   58.4      7.3
     24     6 17.85    +18 22.5    0.554    1.121   87.0   63.4      6.7
     29     6 54.04    +28 53.0    0.474    1.065   84.3   69.4      6.2
Oct.  4     7 53.45    +41 30.9    0.425    1.013   79.5   76.1      5.7
      9     9 31.40    +52 24.2    0.419    0.966   73.3   82.1      5.5
     14    11 35.29    +55 54.6    0.459    0.925   67.5   85.2      5.5
     19    13 12.16    +52 43.6    0.533    0.891   63.0   84.8      5.6
     24    14 09.96    +47 32.3    0.628    0.865   59.4   81.9      5.9
     29    14 44.15    +42 34.5    0.734    0.848   56.5   77.4      6.1
Nov.  3    15 05.81    +38 16.3    0.843    0.842   53.9   72.1      6.4
      8    15 20.54    +34 35.0    0.953    0.846   51.6   66.5      6.7
     13    15 31.21    +31 22.9    1.058    0.860   49.5   61.1      7.0

    Total visual magnitudes: Aug. 23.09 UT, 9.7: (M. Plsek,
Lelekovice, Czech Republic, 0.20-m reflector); 23.79, 10.0 (A. Pearce,
Woodend, Vic., Australia, 20-cm reflector); 24.50, 10.2 (C. E. Spratt,
Victoria, BC, 0.20-m reflector); 25.09, 9.3, (K. Sarneczky, Raktanya,
Hungary, 20 x 60 binoculars); 26.08, 9.7, (K. Hornoch, Lelekovice,
Czech Republic, 0.35-m reflector).

                      (C) Copyright 1996 CBAT
1996 August 30                 (6464)              Brian G. Marsden

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