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IAUC 4822: V745 Sco; V2214 Oph = N Oph 1988; CH Cyg

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                                                  Circular No. 4822
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


V745 SCORPII
     R. M. Wagner and R. Bertram, Ohio State University; S. Starrfield,
Institute of Geophysics and Planetary Physics, Los Alamos National
Laboratory; and S. Shore, Computer Sciences Corporation, report:
"Optical spectra (range 430-500 nm, resolution 0.2 nm) of the recurrent
nova V745 Sco were obtained on Aug. 1.2 UT with the Perkins 1.8-m
telescope at the Lowell Observatory using the Ohio State CCD
spectrograph.  They show strong H beta in emission with a FWHM of about
1200 km/s.  There is a shallow P-Cyg profile extending to about 6000 km/s.
In addition, both the H beta and H gamma emission lines show multiple
subcomponents on the red side of the profile indicating nonspherical
ejection.  In addition to the hydrogen lines, He I 447.1 nm and the
C III/N III 464-nm complex are present in emission.  He II 468.6 nm
is not obvious and may be absent.  Fe II lines are present in emission
at 452.3, 454.1, 455.6 and 458.4 nm.  These spectra resemble that of the
recurrent nova T CrB obtained at maximum light on 1946 Feb. 9 (Morgan
and Deutsch 1947, Ap.J. 106, 362).  The major difference is the absence
of He II 468.6 nm, which was only weakly present at maximum for T CrB
but within a day or two became extremely strong.  The spectral evolution
of this V745 Sco could be extremely rapid; in 1937 the star took 12 days
to decline 3 mag."


V2214 OPHIUCHI = NOVA OPHIUCHI 1988
     Visual magnitude estimates: Apr. 3.83 UT, 13.0 (A. Pearce, Perth,
Western Australia); 15.85, 13.3 (Pearce); May 4.84, 13.4 (P. Williams,
Heathcote, N.S.W.); 12.85, 13.2 (Williams); June 3.85, 13.8
(Williams); 9.98, 14.1 (A. Boattini, Piazzano, Italy); 24.56, 13.8
(Pearce); July 30.87, 14.9 (Boattini).


CH CYGNI
     Visual magnitude estimates: Jan. 1.76 UT, 8.0 (P. Schmeer,
Bischmisheim, West Germany); 18.8, 9.0 (A. Mizser, Budapest, Hungary);
Feb. 7.11, 8.8 (A. Pereira, Linda-a-Velha, Portugal); 26.09, 7.9
(Schmeer); Mar. 12.13, 8.4 (Pereira); 27.1, 8.1 (Mizser); Apr. 16.10,
8.3 (Schmeer); May 9.08, 8.4 (Schmeer); 24.92, 8.2 (Schmeer); June
12.1, 7.8 (J. Bortle, Stormville, NY); 27.85, 7.6 (A. Boattini,
Florence, Italy); July 7.07, 8.0 (Pereira); 28.58, 7.8 (T. Kato,
Kyoto, Japan).


1989 August 2                  (4822)              Brian G. Marsden

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