---------- Forwarded message ---------- Date: Mon, 5 Sep 2005 13:53:53 +0100 From: Denis Buczynski To: Guy Hurst Subject: E2150 ------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2150 2005 Sept 5 13:00 UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- NOVA CENTAURI 2005 W. Liller, Vina del Mar, Chile, reports his discovery of an apparent nova (mag approximately 8.5) on two Technical Pan photographs taken on Sept. 1.031 UT with an 85-mm camera lens and an orange filter. The new object is located at R.A. = 13h20m.8, Decl. = -62o37' (equinox 2000.0); nothing was seen at this location brighter than mag 11.0 on Aug. 12.050. CCD photometry on Sept. 4.028 yielded V = 8.83. On Sept. 4.050, Liller obtained a red CCD spectrum (dispersion at H_alpha = 0.32 nm/pixel) with an objective grating and a 0.20-m Schmidt camera. The spectrum shows a moderately strong H_alpha emission line having a peak approximately twice the brightness of the neighboring continuum; its FWHM is 840 +/- 50 km/s. No P-Cyg absorption is discernible. The close similarity of this spectrum with those of V5114 Sgr (N Sgr 2004) and V5116 Sgr (N Sgr 2005 No. 2) makes it virtually certain that the new object is indeed a classical nova. Visual magnitude estimates: Sept. 3.91, 9.7 (J. G. de S. Aguiar, Monte Mor, Brazil); 3.92, 10.0 (A. Amorim, Florianopolis, Brazil). CBAT Electronic Telegrams 215 NOVA CENTAURI 2005 C. Jacques and E. Pimentel, Belo Horizonte, Brazil, report the following precise position for this nova (cf. CBET 215) from a CCD image taken on Sept. 4.91 UT with a 0.3-m reflector that yielded V = 8.81: R.A. = 13h20m49s.74, Decl. = -62o37'50".5 (equinox 2000.0). Visual magnitude estimate by R. Y. Shida, Sao Paulo, Brazil): Sept. 4.927, 8.8. CBAT Elecronic Telegrams 216 Sebastian Otero reports Using the approximate position in the visual chart by Alexandre Amorim http://costeira1.astrodatabase.net/variaveis/ncen05a.gif I have plotted the nova in a new chart with magnitudes down to V= 11.2: http://ar.geocities.com/varsao/Carta_Nova_Cen_2005.htm Alex observations show the star at mag. 10.0. Past maximum?-- Denis Buczynski -- Denis Buczynski