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IAUC 5412: 1991g1; 1991d1

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IAUC number 

                                                  Circular No. 5412
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


COMET ZANOTTA-BREWINGTON (1991g1)
     Mauro Zanotta and Howard Brewington have independently reported
the discovery of a comet.  The following observations are available:

     1991 UT             R.A. (2000) Decl.      m1     Observer
     Dec. 23.76042   20 44.5       +19 10        9     Zanotta
          23.78473   20 45.0       +19 05                "
          24.07639   20 45         +19.5               Levy
          24.12847   20 47         +18.5        10     Brewington
          24.36146   20 46 44.04   +18 53 06.9  10     Kojima
          24.36510   20 46 44.71   +18 52 58.7           "
          24.37222   20 46 46.24   +18 52 55.6           "
          24.37650   20 46 47.18   +18 52 42.2           "

M. V. Zanotta (Milan, Italy).  0.15-m reflector.  Comet diffuse with
   condensation.
D. H. Levy (Tucson, AZ).  0.4-m reflector.  Only a brief confirmation
   of the comet through a gap in the clouds.  Position uncertain.
H. J. Brewington (Cloudcroft, NM).  0.4-m reflector.  Comet rather
   diffuse and no longer observable after moonrise.
T. Kojima (YGCO Chiyoda Station).  Communicated by S. Nakano.


PERIODIC COMET SHOEMAKER-LEVY 7 (1991d1)
     Continuation to the ephemeris on IAUC 5397:

1991/92     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Dec. 20     3 32.07    +38 28.7    0.801    1.713  147.1   18.2     17.0
     30     3 39.12    +36 23.8    0.872    1.745  140.2   21.2     17.3
Jan.  9     3 49.32    +34 30.3    0.959    1.781  132.9   23.8     17.7
     19     4 02.16    +32 52.5    1.062    1.822  125.8   26.0     18.0
     29     4 17.00    +31 30.4    1.177    1.865  119.0   27.5     18.4
Feb.  8     4 33.37    +30 21.7    1.305    1.912  112.4   28.5     18.8
     18     4 50.86    +29 23.3    1.442    1.961  106.1   29.0     19.2
     28     5 09.10    +28 31.8    1.589    2.012  100.0   29.0     19.6
Mar.  9     5 27.85    +27 44.2    1.742    2.066   94.1   28.7     19.9
     19     5 46.88    +26 57.9    1.901    2.120   88.3   28.0     20.3


1991 December 24               (5412)              Brian G. Marsden

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