Electronic Telegram No. 891 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html NOVA CYGNI 2007 K. Ayani, Bisei Astronomical Observatory (BAO), writes that low-resolution spectra (range 380-800 nm; resolution 0.55 nm at H_alpha) of the possible nova in Cygnus reported on CBAT 890, obtained with the BAO 1.01-m telescope on Mar. 16.8 UT, show that the variable is a nova. The spectra show Balmer and Fe II absorption lines on a red continuum. The H_alpha line has a P-Cyg profile whose absorption bottom is blueshifted by 1200 km/s with respect to the emission peak. H. Naito and M. Sakamoto, Nishi-Harima Astronomical Observatory, report that they obtained a low-resolution spectrogram (range 410-670 nm; resolution 2000 at H_alpha) of the nova on Mar. 16.792 UT with the 2.0-m NAYUTA telescope (+ MALLS). The spectrum shows a broad H_alpha line with a P-Cyg profile and Fe II absorption lines, which suggests that the variable is indeed a classical nova near maximum light. A narrow Na I D absorption feature suggests the existence of a considerable interstellar reddening. The FWHM of the H_alpha emission is 950 km/s, and its absorption minimum is blueshifted by 1150 km/s from the emission peak (measured by a Gaussian fitting). Visual magnitude estimate by K. Hornoch, Lelekovice, Czech Republic: Mar. 17.010 UT, 7.9. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 March 17 (CBET 891) Daniel W. E. Green