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IAUC 5908: 1993u; 1993t

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                                                  Circular No. 5908
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


PERIODIC COMET WISEMAN-SKIFF (1993u)
     Suspected weak images of this comet on CCD frames obtained by
B. Schmidt with the Multiple-Mirror Telescope at Mt. Hopkins on
Feb. 2 (measured by G. V. Williams and Schmidt) are confirmed with
an independent recovery by J. V. Scotti in Spacewatch images
obtained by T. Gehrels at Kitt Peak on Dec. 16 (low altitude,
twilight, rather poor seeing), after which Scotti found the comet on a
single frame obtained on Dec. 10.  On Dec. 16, the comet showed a
coma 13" in diameter (m2 = 22.6), with a faint 0'.34 tail in p.a.
286o.  The indicated correction to the prediction on MPC 16380
(ephemerides on MPC 20654 and 22512) is Delta T = -0.08 day.

     1993 UT             R.A. (2000) Decl.        m1    Observer
     Feb.  2.08400   23 22 07.26   +10 34 32.0          Schmidt
           2.09154   23 22 08.00   +10 34 35.4            "
           2.09866   23 22 09.06   +10 34 42.2            "
     Dec. 10.52020   12 32 25.30   -21 05 46.8   19.6   Scotti
          16.51914   12 39 23.51   -22 24 11.0            "
          16.52650   12 39 24.15   -22 24 16.3   20.8     "
          16.53339   12 39 24.42   -22 24 21.5            "
          16.54100   12 39 24.91   -22 24 25.9            "
          16.54850   12 39 25.59   -22 24 32.6            "


PERIODIC COMET KUSHIDA-MURAMATSU (1993t)
     Numerous additional observations are available on MPEC 1993-
Y02, as are the following elliptical orbital elements, by S. Nakano,
Sumoto, from 35 observations Dec. 8-15:

     T = 1993 Nov.  4.459 TT          Peri. = 333.504
     e = 0.35592                      Node  =  96.737   2000.0
     q = 2.33989 AU                   Incl. =   1.673
       a =  3.63294 AU     n = 0.142337     P =   6.92 years

1993/94     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Dec.  9     5 35.54   +22 33.3   1.371   2.351  172.6    3.1   15.4
     19     5 27.47   +22 37.0   1.377   2.359  175.3    2.0   15.4
     29     5 20.03   +22 40.3   1.409   2.368  163.4    6.8   15.5
Jan.  8     5 14.39   +22 44.3   1.466   2.379  151.9   11.2   15.6
     18     5 11.38   +22 50.1   1.546   2.392  141.1   15.0   15.7


1993 December 16               (5908)            Daniel W. E. Green

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