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IAUC 5729: 1993d

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                                                  Circular No. 5729
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)


COMET MUELLER (1993d)
     J. V. Scotti, Lunar and Planetary Laboratory, provides the
following precise positions, obtained with the 0.9-m Spacewatch
telescope, Kitt Peak:

     1993 UT             R.A. (2000) Decl.        m1
     Mar. 26.46322   12 56 39.87   +64 22 17.0   18.2
          26.49987   12 56 38.28   +64 22 16.8
          26.50309   12 56 38.08   +64 22 16.9
          28.17852   12 55 25.11   +64 21 20.3
          28.18181   12 55 24.90   +64 21 20.0
          28.18539   12 55 24.83   +64 21 19.7
          28.37872   12 55 16.00   +64 21 11.6   16.6
          28.38299   12 55 15.82   +64 21 11.6

Nuclear magnitudes m2 = 21.5 on Mar. 26 and 19.8 on Mar. 28.
Cirrus was probably present on Mar. 26, and the magnitudes may be too
faint; the coma was of diameter 12", and the tail extended > 0'.75 in
p.a. 298 deg.  On Mar. 28 the coma diameter was 18", and the tail
extended 3'.17 in p.a. 300 deg.

     Parabolic orbital elements from 10 observations Mar. 19-28:

     T = 1993 June 15.991 TT          Peri. =  93.265
                                      Node  =  74.894   2000.0
     q = 6.10432 AU                   Incl. =  53.757

1993 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Feb. 22    13 15.18    +63 11.3    5.618    6.156  118.8    8.1     17.1
Mar.  4    13 11.09    +63 49.4    5.619    6.147  118.0    8.2     17.1
     14    13 05.34    +64 14.0    5.634    6.139  116.2    8.4     17.1
     24    12 58.47    +64 22.8    5.663    6.132  113.7    8.6     17.1
Apr.  3    12 51.13    +64 14.2    5.704    6.126  110.5    8.8     17.2
     13    12 44.04    +63 47.9    5.756    6.121  106.8    9.0     17.2
     23    12 37.81    +63 04.9    5.817    6.116  102.6    9.2     17.2
May   3    12 32.93    +62 06.4    5.885    6.112   98.3    9.4     17.2
     13    12 29.66    +60 54.8    5.960    6.109   93.7    9.5     17.2
     23    12 28.09    +59 32.3    6.038    6.107   89.1    9.5     17.3
June  2    12 28.21    +58 01.2    6.120    6.105   84.4    9.5     17.3


1993 March 28                  (5729)              Brian G. Marsden

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