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THE ASTRONOMER Electronic Circular No 2841      2012 Jly 21 19.26UT
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      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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NOVA SAGITTARII 2012 No. 5
Tadashi Kojima, Japan reports on CBET 3182 discovery of a possible 
magnitude 12.6 nova on two frames (limiting magnitude 14) taken on 2012 
July 16.51UT using a Canon EOS 40D camera (+ 150-mm f/2.8 lens). The new 
object is located at:
RA 18h 19m 37.0s DEC -19 07' 40" (2000); nothing was visible at this 
position on Kojima's earlier patrol frames of 2011 Apr. 9.74, July 5.51, 
Sept. 23.42, 2012 Mar. 25.78, Apr. 14.71, May 23.68, and June 22.54 
(limiting mag 13.5).  Additional magnitudes for the new object:  1991 
Aug. 30, [19 (Toru Yusa, Osaki, Japan; red Digitized Sky Survey plate); 
2012 July 17.59, 12.2 (Kojima); July 18.520, I_c = 9.92 (Hiroyuki 
Maehara, Kwasan Observatory, Kyoto University, 0.25-m telescope); July 
18.522, R_c = 11.18 (Maehara); July 18.524, V = 12.45 (Maehara).

Kazuyoshi Imamura and Minako Ogi, Okayama University of Science (OUS), 
report obtaining a low-resolution spectrogram on July 18.52UT, using the 
DSS-7 spectrometer attached to the 0.28-m Schmidt-Cassegrain telescope 
at the OUS observatory.  The spectrum shows an H-alpha emission line on 
a reddened continuum.  The FWHM of H-alpha is approximately 1000 km/s. 
 From this result, the variable is thought to be a classical nova.  The 
spectrum has been posted at the following website URL:
http://tnblab.blog7.fc2.com/blog-entry-321.html.


On CBET 3184 U. Munari et. al., Istituto Nazionale di Astrofisica, 
Osservatorio Astronomico di Padova report that optical spectra obtained 
on July 18.88 UT with the Asiago 1.22-m telescope shows hydrogen Balmer 
and Fe II lines (multiplets 42, 48, 49, 27, 28, 37, 38) in strong 
emission, and it is classified as a "Fe II"-type nova close to maximum 
brightness. Strong interstellar Na I and K I atomic lines and diffuse 
bands (at 443.0, 578.0, 627.0, 628.4, and 6614 nm) indicates large 
interstellar reddening affecting the nova.

R. A. Koff, Bennett, CO, USA, reports that unfiltered CCD images 
(limiting magnitude 16.0) taken around July 18.22UT with a Meade 0.25-m 
f/10 reflector yield magnitude 11.6 and the following position:
RA 18h 19m 36.94s DEC -19 07' 40.5" (2000).

SUPERNOVA 2012da IN PGC 83768 (CSS)
2012da  Jun 18.24   13 02 33.66  +27 26 11.3  16.8  20.2"W   10.7"S
G. H. Marion: spectrum June 19 type-Ia several days before maximum 
light. A good fit is found to the template of SN 2003du at 11 days 
before maximum.

Guy Hurst reports that V photometry using the BRT in galaxy mode and 
Sierra Stars (SSON) 0.61-m Cassegrain telescope gave: July 14.01, 16.2V 
(BRT); July 20.21UT, 16.8V (SSON). Reductions involved use of the 
sequence TA20120714.

Guy M Hurst