2011CBET.2644....1N

S. Nakano, Sumoto, Japan, rpeorts the discovery by Hideo Nishimura (Miyawaki, Kakegawa, Shizuoka-ken, Japan) of a possible nova (mag 11.2) on two 15-s CCD frames (limiting magnitude 12.5) taken on Jan. 25.86 UT using a Canon 200-mm f/3.2 lens and a Canon EOS 5D digital camera mounted on a Takahashi EM100 equatorial telescope. Nishimura measures the variable to be located at R.A. = 17:47:46.33, Decl. = -23:35:13.1 (equinox 2000.0); Nakano measures position end figures 46s.39, 11".2 (uncertainty ± 3") and magnitude 11.4 ± 0.6 for the variable from Nishimura's two discovery frames (limiting mag 13.2). The object was posted on the Central Bureau's TOCP webpage with the provisional designation PNV J17474639-2335112. Additional magnitudes for the variable: 2010 May-Nov., [12.5: (Nishimura; eighteen frames taken during this span); 2011 Jan. 17, 11.5 (Nishimura); 24, 11.5 (Nishimura); 27.549, B = 12.46, V = 12.38, R_c = 10.38, I_c = 9.62 (S. Kiyota, remotely using the GRAS-004 0.25-cm reflector near Mayhill, NM, USA; position end figures 46s.11, 12".8); 27.844, 11.0 (T. Yusa, Osaki, Japan; 0.30-m f/7 Cassegrain telescope + unfiltered SBIG STL-1001E CCD camera); 27.850, 11.1 (Yusa); 27.851, 11.2 (Ken-ichi Kadota, Ageo, Japan, 0.25-m f/5 reflector + unfiltered SBIG ST-9E CCD camera; limiting mag 15.8; eight 10-s stacked frames; position end figures 46s.23, 13".7; via Nakano); 27.857, 11.2 (Yusa); 27.860, 11.2 (Yusa); 27.863, 11.2 (Yusa). Yusa reports position end figures 46s.22, 13".7 from five stacked 30-s exposures (limiting mag 17.0). One of Yusa's image is posted at the following website URL: http://space.geocities.jp/yusastar77/PNinSgr_110128.htm. Kadota's images is at http://members.jcom.home.ne.jp/kenic-k/image/PNinSgr-20110127.jpg.