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IAUC 4397: N Sgr 1987; U Sco; 1987A; 1986l

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                                                  Circular No. 4397
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


NOVA SAGITTARII 1987
     R. H. McNaught, Siding Spring Observatory, reports his discovery
of a nova on 85-mm patrol camera Tri-X films, and he provides
the following magnitude estimates:  May 11.80 UT, [11.5; 18.79,
10.5; 20.48, 10; 21.68, 10.5; 24.39, 10 (visual); 25.4, 10 (visual).
No pre-nova candidate is visible on ESO B film nor on U.K.
Schmidt J, I, or R survey films.  McNaught provides his measurement
of the nova's position from a plate taken with the Uppsala Southern
Schmidt telescope:  R.A. = 17h56m28.96, Decl. = -32 16'13.4 (+/- 0".4,
equinox 1950.0).  An IPCS spectrum taken by S. Lee, B. Peterson, and T.
Shanks with the Anglo-Australian Telescope on May 24 shows the star
to be red with strong H-alpha emission (FWHM about 1000 km/s).


U SCORPII
     Visual magnitude estimates:  May 21.65 UT, 12.3 (S. Sakuma,
Kawasaki, Japan); 22.65, 13.4 (McNaught); 23.45, 14.0 (T. Cragg,
Siding Spring Observatory); 25.66, 14.2 (McNaught).


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     R. J. Patterson and P. A. Ianna, Astronomy Department, University
of Virginia, report:  "We have measured, using the Mt. Stromlo
PDS microdensitometer, the position of SN 1987A from 4 plates (
IIaO, scale 18".85/mm) taken on 1987 Feb. 25 with the 0.66-m Yale-
Columbia refractor located at Mt. Stromlo; two of the plates were
taken with a neutral-density filter which reduced the intensity of
the SN by about 4.5 mag.  Using 19 transfer stars measured with 9 Perth
standard stars, we find the following position for the SN:  R.A. =
5h35m49.896 +/- 0".16, Decl. = -69 17'58.26 +/- 0".05, equinox 1950.0."
     Visual magnitude estimates:  May 21.57 UT, 2.8 (McNaught);
22.33, 2.8 (D. A. J. Seargent, The Entrance, N.S.W.); 23.44, 2.9
(G. Garradd, Tamworth, N.S.W.); 24.56, 2.8 (McNaught); 25.36, 2.8
(Seargent); 25.40, 2.9 (McNaught).


COMET WILSON (1986l)
     Total visual magnitude estimates (cf. IAUC 4391):  May 17.13
UT, 6.2 (A. Hale, Las Cruces, NM, 10x50 binoculars); 19.42, 6.2
(Garradd, 7x50 binoculars); 20.42, 6.3 (Garradd); 21.40, 6.3
(Garradd); 23.42, 6.3 (Garradd); 24.43, 6.5 (Garradd).


1987 May 25                    (4397)            Daniel W. E. Green

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