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IAUC 4448: 1987w; 1987u; 1987s; 1987A

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                                                  Circular No. 4448
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 HELIN (1987w)
     Eleanor F. Helin, Jet Propulsion Laboratory, reports her
discovery of a comet on Palomar Sky Survey II plates exposed by J.
Mueller with the Palomar 1.2-m Schmidt.  The object is condensed,
with a faint diffuseness toward p.a. 235 deg, suggesting a tail that
is visible on both nights.  The following measures are by J. Alu:

     1987 UT              R.A. (1950) Decl.             m1
     Aug. 24.43264      1 22 08.33     + 4 01 59.5     16.5
          24.48472      1 22 09.06     + 4 01 55.9
          26.42361      1 22 37.22     + 3 58 46.2
          26.47222      1 22 37.74     + 3 58 41.7


COMET RUDENKO (1987u)
     Total visual magnitude estimates: Aug. 26.11 UT, 10.1 (D.
Levy, Amherst, MA, 0.20-m reflector); 28.20, 9.9 (A. Hale, Las
Cruces, NM, 0.20-m reflector); 31.18, 9.6 (E. A. Jacobson, Evansville,
MN, 0.25-m reflector); Sept. 1.19, 9.4 (C. E. Spratt, Victoria,
BC, 0.20-m reflector); 1.5, 9.5 (M. Koishikawa, Sendai,
Japan, 0.20-m reflector); 11.13, 8.6 (Hale, 0.41-m reflector).


COMET BRADFIELD (1987s)
     Total visual magnitude estimates: Aug. 20.44 UT, 8.9 (G.
Garradd, Tamworth, N.S.W., 0.15-m reflector); 22.05, 8.9 (D. W. E.
Green, Oak Ridge Observatory, 20 x 80 binoculars); 24.06, 8.8
(G. R. Chester, Rixeyville, VA, 0.22-m reflector; 10' tail in p.a.
105 deg); 28.13, 8.6 (J. V. Scotti, Tucson, AZ, 0.15-m reflector);
29.16, 8.6 (E. A. Jacobson, Evansville, MN, 20 x 80 binoculars);
31.31, 8.5 (G. Wolf, Wellington, N.Z., 0.06-m refractor); Sept.
10.46, 7.6 (Garradd; 15' tail in p.a. 120 deg); 11.14, 8.3 (Scotti).


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     G. K. Moore, University of Wollongong, provides the following
photometric observations: Sept. 11.7 UT, V = 5.10, B-V = +1.40, V-I
= +1.53, V-R = +1.14.
     Visual magnitudes by A. C. Beresford, Adelaide, S. Australia:
Sept. 4.54 UT, 5.0; 6.49, 5.0; 10.41, 5.1; 11.60, 5.1; 12.47, 5.2.


1987 September 15              (4448)              Brian G. Marsden

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