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IAUC 5042: 1990Q; 1990N; RY Sgr; 1990c

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IAUC number 

                                                  Circular No. 5042
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


SUPERNOVA 1990Q IN NGC 5917
     S. Benetti, E. Cappellaro, and M. Turatto, Asiago Astrophysical
Observatory, communicate:  "A CCD spectrum of SN 1990Q was
obtained on June 27.92 UT with the Asiago 1.82-m telescope.  The
spectrum is dominated by the emission of H-alpha centered at 656
nm with the relatively weak P-Cyg absorption at 642 nm, indicating
a type-II supernova."
     M. Della Valle, European Southern Observatory, reports:
"Preliminary inspection of low-resolution CCD spectra (range 300-
900 nm), obtained on June 28.1 UT with the ESO 3.6-m telescope at
La Silla, finds P-Cyg profiles for Balmer lines and Na I (587 nm)
and indicates the supernova is of type II.  The peak of the H-
alpha emission appears blueshifted at about 653.5 nm in the galaxy
rest frame.  The expansion velocity corresponding to the difference
between the rest wavelength in the galaxy's frame and the
minimum of the absorption is about 7000 km/s.  The redshift of
the host galaxy is z = 0.0053."


SUPERNOVA 1990N IN NGC 4639
     C. Pennypacker, S. Perlmutter, and C. K. Smith, The Berkeley
Supernova Search Team, note that SN 1990N was not present at the
95-percent confidence level, down to magnitude V = 17.0 on a CCD
image of NGC 4639 taken at Leuschner Observatory on June 13.27 UT.


RY SAGITTARII
     J. Mattei and E. Waagen, AAVSO, forward the following
photoelectric V observations by L. Snyder, Crystal Bay, NV:  June 4.44
UT, 11.15; 5.424 10.96; 11.424, 9.66; 11.435, 9.63; 13.428, 9.31;
23.435, 7.88.


COMET LEVY (1990c)
     Total visual magnitude estimates (cf. IAUC} 5029):  June 17.33
UT, 9.0 (C. S. Morris, Lockwood Valley, CA, 20x80 binoculars); 18.10,
8.7 (A. Pereira, Cabo da Roca, Portugal, 0.15-m reflector); 20.02,
8.3 (G. Keitch, Wrington, Avon, England, 10x50 binoculars); 23.89,
9.0 (A. Pearce, Scarborough, W.A., 0.20-m reflector); 24.34, 8.4
(Morris; tail about 1 deg long); 24.98, 8.5 (H. Mikuz, Ljubljana,
Yugoslavia, 15x80 binoculars); 26.99, 8.3 (Mikuz); 27.88, 8.7 (Pearce).


1990 June 28                   (5042)             Daniel W. E. Green

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