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IAUC 4472: 1987z; 1987a1; 1987 SY; 1987m

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                                                  Circular No. 4472
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET SHOEMAKER-HOLT (1987z)
     Carolyn S. and Eugene M. Shoemaker and Henry Holt report their
discovery of a comet on films obtained with the 0.46-m Schmidt
telescope at Palomar, as indicated below.  The object is strongly
condensed, with a slight coma asymmetric toward the southwest.

           1987 UT           R.A. (1950) Decl.      m1
           Oct. 18.33524     1 07.5     + 8 50     14.5
                19.48020     1 06.5     + 8 47


COMET MUELLER (1987a1)
     Jean Mueller reports her discovery of a comet with the 1.22-m
Schmidt telescope at Palomar in the course of the second Palomar
Sky Survey.  A confirming plate was taken on Oct. 19 by N. Reid and
Mueller.  The object is diffuse with condensation and an apparent
tail to the south-southwest of length about 20"-30".  The following
semi-accurate measurements of the ends of trails are by A. Maury:

  1987 UT            R. A.  (1950)  Decl.       m1     Observer
  Oct. 18.27431     1 12 47.4     +12 25 50     17     Mueller
       18.32639     1 12 44.8     +12 25 45              "
       19.29861     1 12 00.5     +12 24 53     17     Reid
       19.30764     1 12 00.9     +12 24 55              "


1987 SY
     D. I. Olsson-Steel and B. A. Lindblad, Lund Observatory,
communicate: "1987 SY may be the parent of the delta Leonid meteor
shower. The theoretical radiant at closest approach around Feb. 18 is
R.A. = 156 deg, Decl. = 19 deg, velocity = 22 km/s.  This is very close
to the shower radiant found in the Harvard photographic survey (Lindblad
1971, Smithsonian Contrib. Astrophys. 12, 21).  Direct orbital
comparisons support the link."


PERIODIC COMET BROOKS 2 (1987m)
     Total visual magnitude estimates (L = reflector):  Sept. 23.38
UT, 13.9 (R. Keen, Boulder, CO, 0.32-m L); 27.27, 12.8 (C. Morris,
Lockwood, Valley, CA, 0.26-m L); Oct. 1.34, 12.5 (Keen); 16.31,
12.6 (A. Hale, Las Cruces, NM, 0.41-m L); 18.28, 12.4 (Morris).


1987 October 19                (4472)            Daniel W. E. Green

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