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THE ASTRONOMER Electronic Circular No 2725      2011 Mar 29 15.30UT
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 2011 No. 2 = PNV J18102135-2305306
Koichi Nishiyama and Fujio Kabashima of Japan report on CBET 2679 their 
discovery of a possible nova of magnitude 11.7 on two 40-s unfiltered 
CCD frames (limiting magnitude 13.2) taken on 2011 Mar. 27.832UT using a 
105-mm f/4 camera lens + CCD. The presence of the transient was 
confirmed on five CCD frames (limiting magnitude 16.3) taken around 
Mar.27.854 using a Meade 0.40-m reflector + CCD.

The transient is located at:
RA 18h 10m 21.35s DEC -23 05' 30.6" (2000).
Nothing is visible at this position on two past survey frames taken on 
Mar. 17.814 (limiting mag 13.4) and 26.837 (limiting mag 13.2). The 
object was given the provisional designation PNV J18102135-2305306.

According to A. Arai, a low -resolution spectrum of Mar 28.72UT obtained 
at KAO shows prominent emission lines of H_alpha, H_beta, and Fe IIon a 
highly reddened continuum.  The FWHM of the H_alpha emission line is 
about 900 km/s, and the Na D absorption line is also seen (equivalent 
width about 0.7 nm). These features suggest that the object is a 
classical nova that is reddened by interstellar matter.

Seiichiro Kiyota, Japan relays that images obtained remotely with a 
0.31-m f/6.3 reflector at the GRAS Observatory, Australia on Mar. 28.67 
yield magnitudes V = 12.81, R_c = 11.54, I_c = 10.38, B = 14.66, and 
position end figures 21.36s, 29.9"for the nova.

Elizabeth Waagen, AAVSO, advises that N Sgr 2011 No. 2 has been entered 
into VSX and assigned the identifier VSX J181021.3-230530. Finder charts 
for N Sgr 2011 No. 2 may be plotted by entering the coordinates above in 
the International Variable Star
Plotter: http://www.aavso.org/vsp
She asks that reported observations to the AAVSO International Database 
use N SGR 2011 NO. 2.

Please also send full details of your observations to the TA Editor.

Guy M Hurst