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IAUC 6494: P/1996 U1; C/1995 O1

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                                                  Circular No. 6494
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 P/1996 U1 (SHOEMAKER-LEVY 3)
     G. Hahn, Institut fur Planetenerkundung, DLR Forschungszentrum,
Berlin, reports the recovery of comet P/1991 C1 (= 1990 XXVII =
1991e) by A. Maury, M. Lundstrom and himself in the course of the
OCA-DLR Asteroid Survey using the 0.9-m Schmidt telescope + CCD at
Caussols.  The comet was diffuse, with no tail, in moderate to
poor seeing.  The nominal correction (ignoring perturbations between
now and the epoch) to the prediction by S. Nakano on MPC 25183 is
Delta T = -0.1 day.

     1996 UT             R.A. (2000) Decl.        m1
     Oct. 17.99750    1 39 09.25   +17 39 57.9   19.3
          18.00267    1 39 08.97   +17 39 56.9   19.2
          18.01193    1 39 08.60   +17 39 54.9   19.3
          18.92657    1 38 29.45   +17 36 34.7   19.3
          18.93547    1 38 29.09   +17 36 33.2   19.2
          18.94122    1 38 28.81   +17 36 32.1   19.2

     The following improved orbital elements, by the undersigned,
satisfy 25 observations 1991-1996 with mean residual 0".6:

                    Epoch = 1998 Mar.  8.0 TT
     T = 1998 Mar.  4.9475 TT         Peri. = 181.3886
     e = 0.247914                     Node  = 303.7122  2000.0
     q = 2.817332 AU                  Incl. =   5.0086
       a =  3.746025 AU    n = 0.1359402    P =   7.250 years

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Oct. 14     1 41.98    +17 53.9    2.649    3.633  168.6    3.1     19.2
     24     1 34.86    +17 17.1    2.621    3.610  172.6    2.0     19.2
Nov.  3     1 27.96    +16 35.4    2.623    3.587  164.1    4.3     19.1
     13     1 21.90    +15 52.8    2.654    3.565  153.1    7.2     19.1
     23     1 17.24    +15 13.7    2.711    3.542  142.1    9.9     19.2
Dec.  3     1 14.33    +14 41.6    2.790    3.519  131.3   12.2     19.2
     13     1 13.36    +14 19.0    2.888    3.497  120.8   14.0     19.2
     23     1 14.38    +14 07.4    2.999    3.474  110.9   15.3     19.3


COMET C/1995 O1 (HALE-BOPP)
     Corrigendum.  On IAUC 6493, line 6, for Q(NH2)/Q(H2O) = 0.1 read
Q(NH2)/Q(H2O) = 0.001.

                      (C) Copyright 1996 CBAT
1996 October 19                (6494)              Brian G. Marsden

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