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IAUC 5634: N Sgr 1992 No. 3; 1992bb; 1992t; N Cyg 1992

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                                                  Circular No. 5634
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)


NOVA SAGITTARII 1992 No. 3
     Paul J. Camilleri, Cobram, Victoria, Australia, reports his
photographic discovery (using an 85-mm camera lens + T-Max 400
film) of an apparent nova, providing the following photovisual
magnitude estimates:  Sept. 29.41 UT, [12; Oct. 13.40, 9.0.  Camilleri
notes that there is no image in the immediate position of the nova
on Union Observatory prints from 1927 Aug. 19, to a limiting
magnitude of 15.
     R. H. McNaught, Anglo-Australian Observatory, confirms the
apparent nova from a pair of CCD images taken with the 1.0-m reflector
at Siding Spring on Oct. 13.54.  The nova's position is R.A. =
18h20m37s, Decl. = -23 01'.4 (equinox 1950.0).  The object lies
about 1' east and 3' north of SAO 186756.  The brightest possible
candidate on the ESO B and R and the SERC J surveys is a star of
mag about 18.


SUPERNOVA 1992bb IN IRAS 21156-0747
     M. Della Valle and R. Corradi, European Southern Observatory,
report:  "A spectrogram (range 490-690 nm, resolution about 1 nm)
of SN 1992bb (cf. IAUC 5629) was obtained with the 1.5-m telescope
(+ Boller & Chivens spectrograph) at La Silla on Oct. 6.2 UT.
Preliminary analysis reveals this object to be a type-Ia supernova.
The expansion velocity deduced from the minimum of the Si II 635-nm
absorption is about 10 000 km/s."


PERIODIC COMET SWIFT-TUTTLE (1992t)
     Total visual magnitude estimates (cf. IAUC 5627):  Oct. 2.05
UT, 9.0 (G. Kronk, Troy, IL, 0.33-m reflector); 3.50, 8.6 (C. S.
Morris, Pine Mountain Club, CA, 20x80 binoculars); 4.37, 8.4 (D. W.
E. Green, near Franklin, NH, 12x50 binoculars); 6.39, 8.6 (J. E.
Bortle, Stormville, NY, 20x80 binoculars); 7.39, 8.2 (Bortle);
7.50, 8.3 (C. S. Morris, near Mt. Wilson, CA, 20x80 binoculars);
8.15, 8.0 (R. Haver, Viterbo, Italy, 15x80 binoculars); 9.51, 8.0
(Morris); 12.98, 7.9 (Bortle).


NOVA CYGNI 1992
     Photometry by R. Monella, Covo, Italy:  Sept. 27.892 UT, V =
9.29, B-V = +0.17; 30.934, 9.32, +0.16; Oct. 2.967, 9.32, +0.17
(comparison star BD +52 2734).


1992 October 13                (5634)            Daniel W. E. Green

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