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AAVSO Special Notice #230

Nova Sagittarii 2011 = PNV J17474639-2335112

January 31, 2011: Central Bureau for Astronomical Telegrams Electronic Telegram No. 2644 (CBET 2644, Daniel W. E. Green, ed.) announces the discovery by Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan (reported by S. Nakano, Sumoto, Japan), of a nova in Sagittarius on 2011 Jan. 25.86 UT at unfiltered magnitude 11.2 on two 15-s CCD frames with limiting magnitude 12.5; Nakano measured magnitude 11.4 +/- 0.6 on Nishimura's frames. The object was posted on the Central Bureau's Transient Objects Confirmation Page (TOCP) with the provisional designation PNV J17474639-2335112.

Coordinates: R.A = 17:47:46.33, Decl. = -23:35:13.1 (equinox 2000.0)
Nakano measures position end figures 46.39s, 11.2" (uncertainty +/- 3")

Low-resolution spectra by Akira Arai, Koyama Astronomical Observatory, Kyoto Sangyo University, and by Kazuyoshi Imamura, Okayama University of Science, on Jan. 28.863 and Jan. 28.886 UT, respectively, indicate the object is a classical nova past maximum light, highly reddened by interstellar medium.

Charts: Finder charts for Nova Sgr 2011 (AUID 000-BJY-161) may be plotted by entering the coordinates above into VSP:

http://www.aavso.org/observing/charts/vsp/

Reporting Observations: Please report all observations to the AAVSO as NOVA SGR 2011 or PNV J17474639-2335112 (NOVA SGR 2011 is preferred).

Congratulations to Hideo Nishimura on his latest discovery!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
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