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IAUC 8767: P/2006 U4

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                                                  Circular No. 8767
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET P/2006 U4 (SHOEMAKER-LEVY)
     R. H. McNaught and D. M. Burton report the recovery of comet
P/1991 V1 = 1991b_1 = 1991 XVIII on images taken with the 0.5-m
Uppsala Schmidt telescope at Siding Spring, the comet's images on
Oct. 26.5 UT being fairly weak, with a coma of FWHM 6" and an ill-
defined faint tail 10" long in p.a. 120 deg.  At the request of the
Central Bureau, the comet was observed on Oct. 27.4 by A. C.
Gilmore at Mt. John Observatory (0.6-m f/6.4 reflector), who in
poor seeing described the comet as a diffuse spot of FWHM 4"; the
final position is of poor quality, with the image located between
star trails.  The indicated correction to the prediction by S.
Nakano (MPC 48384 and Comet Handbook 2006) is Delta(T) = +8.0 days.

     2006 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 26.46792   19 23 14.36   -39 35 06.7   18.2   McNaught
          26.51716   19 23 25.63   -39 34 08.1   17.4     "
          27.40930   19 26 52.56   -39 16 40.2            "
          27.41528   19 26 53.93   -39 16 32.6            "
          27.43316   19 26 57.96   -39 16 06.8   18.7   Gilmore
          27.44152   19 26 59.92   -39 15 57.4   18.6     "
          27.44991   19 27 01.81   -39 15 46.7   18.7     "
          27.47842   19 27 08.58   -39 15 16.1            "

     The following orbital elements linking the two apparitions are
by B. G. Marsden:

                    Epoch = 1991 Oct. 31.0 TT
     T = 1991 Oct. 13.8642 TT         Peri. = 333.1337
     e = 0.705912                     Node  =  37.9308  2000.0
     q = 1.132412 AU                  Incl. =  16.8569
       a =  3.850584 AU    n = 0.1304410    P =   7.556 years

                    Epoch = 2006 Dec. 11.0 TT
     T = 2006 Nov. 25.0013 TT         Peri. = 333.5580
     e = 0.706643                     Node  =  37.8728  2000.0
     q = 1.127551 AU                  Incl. =  16.9267
       a =  3.843617 AU    n = 0.1307959    P =   7.535 years

                      (C) Copyright 2006 CBAT
2006 October 27                (8767)            Daniel W. E. Green

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