POSSIBLE NOVA IN Sagittarius

Guoyou Sun(Wenzhou, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China)，reports the discovery of a possible nova (mag approximately 11.5) on several 60-s survey images (limiting mag about 13.5)taken by Xing Gao in Xingming Observation(C42) Nova Survey around feb.23.94652 UT and feb.23.96319 UT (2pass) using a Canon EOS 350D Camera (fl.= 135-mm f/2.0 lens,ISO 800), the new object approximately located at R.A. =17h45m06s Decl.= -20°03’26” (equinox 2000.0), Nothing was visible at this location on images taken on Aug 23，2008；Sep 4，2008； Sep 25，2008， Oct 3,2008。

All images can see from:http://www.xjltp.com/XM09AA/XM09AA.htm

C42 Xingming Observatory, Mt. Nanshan. Observers G.Sun ,X.Gao ,Measurers X.Gao.
regards,
Xing Gao

the picture of discovery


20090223 22:43 UT	20080928 19:43 UT(limiting mag about 14.0)	20081003 17:17 UT(limiting mag about 14.0)
the discovered picture	Historical Pictures	Historical Pictures
	Animation

followed observed Pictures:


20090224 22:43 UT	20090227 22:43 UT

we have another system to capture this field ,the limiting mag is about 16.0.(0.11-m F2.8 camera lens+Canon350D,ISO 800,100-S exposal)


20090227 23：01 UT	20090228 23:14 UT

20090302 23:15 UT	20090302 23:08 UT

below is the astrometry from this four+1 FITS file.

COD C42
CON G.Sun,Wenzhuo,Zhejiang,China;X.Gao,Urumqi No.1 Middle School,XinJiang,China
OBS G.Sun,X.Gao
MEA G.Sun
TEL 0.11-m F2.8 camera lens+Canon350D
ACK MPCReport file updated 2009.03.04 08:33:28
AC2 dofur@hotmail.com
NET USNO-A2.0
XW09A4   C2009 02 27.95993 17 45 05.30 -20 03 21.6          12.1 V      C42
XW09A4   C2009 02 28.96809 17 45 05.46 -20 03 22.0          12.0 V      C42
XW09A4   C2009 03 02.96337 17 45 05.44 -20 03 21.7          13.0 V      C42
XW09A4   C2009 03 03.96410 17 45 05.42 -20 03 21.4          12.8 V      C42

XW09A4 C2009 03 06.96759 17 45 05.54 -20 03 22.6 13.1 V C42