2010年11月27日晚，阮建高在SNSP适时搜索中，在M33发现一个暗弱的可疑目标，后经过补拍验证，认为是新星可疑目标，测量后上报。
POSSIBLE NOVA IN M33
Jiangao Ruan(Fangchenggang, Guangxi, China) and Xing Gao (Urumqi, Xinjiang, China)，report the discovery of a possible nova (mag approximately 18.6) on several 60-s survey images (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Nov. 27.52970 UT using a unfilled CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). the new object approximately located at R.A.=01h33m27s.59 Decl.=+30°17’28”.7 (equinox 2000.0). Nothing is visible at this position on archival images taken on Nov. 25 (limiting mag 19.5) and Nov.26(limiting mag 19.5) or on the DSS(POSS-II N) from 1989-12-04 (limiting red mag 20.8).
All images can be seen from: http://www.xjltp.com/XOSS/XM10BH/XM10BH.htm
NET USNO-B1.0
XM10BH C2010 11 27.52970 01 33 27.59 +30 17 28.7 18.6 V C42
C42 Xingming Observatory, Mt. Nanshan. Observers J.Ruan,X.Gao ,Measurers J.Ruan. 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
2010年11月30日上午，CBET发布该系外新星有我们首先发现，以下为通报内容。祝贺阮建高。这是星明天文台发现的第二颗系外新星，也是首次在M33星系中发现新星。
NOVA IN M33: M33N 2010-11a
Jiangao Ruan, Fangchenggang, Guangxi, China; and Xing Gao, Urumqi,
Xinjiang, China, report the discovery of a possible nova (mag approximately
18.6) on several 60-s and 120-s survey images (limiting mag about 19.5) taken
by Xing Gao in the course of the Xingming Observatory Sky Survey around Nov.
27.5297 UT using an unfiltered CCD camera with a Celestron C14
Schmidt-Cassegrain telescope at Mt. Nanshan. The new object is located at
R.A. = 1h33m27s.55 +/- 0s.04, Decl. = +30d17’28”.4 +/- 0″.3 (equinox 2000.0).
Additional magnitudes from Gao and Ruan: 1989 Dec. 4, [20.8 (Digitized Sky
Survey, red plate); 2010 Nov. 25, [19.5; 26, [19.5; 27.835, 17.7; 28.527, 16.8.
Their images have been posted at http://www.xjltp.com/XOSS/XM10BH/XM10BH.htm.
The apparent nova was discovered independently by Koichi Nishiyama
(Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) at mag 16.7 on eight
40-s unfiltered CCD frames (limiting magnitude 19.4) taken around Nov.
28.542 UT with a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera).
They measure M33N 2010-11a to be located at position end figures 27s.54,
28″.4, which is 301″ west and 1329″ south from the center of the galaxy
M33. Additional magnitudes by Nishiyama and Kabashima for M33N 2010-11a:
1989 Dec. 4, [19.5 (DSS, infrared); 1991 Oct. 5, [19.4 (DSS, red);
2010 Nov. 24.551, [19.1; 26.520, [19.6; 29.629, 16.5.
Following a request from Kabashima and Nishiyama, T. Yusa, Osaki, Japan,
reports mag 16.1 and position end figures 27s.55, 28″.5 for M33N 2010-11a
from unfiltered CCD frames (limiting mag 18.5) taken on Nov. 29.064 UT
remotely using a 0.25-m f/3.4 hyperbolic astrograph (+ SBIG ST-10XME camera)
at the RAS Observatory near Mayhill, NM, U.S.A. Yusa’s image has been posted
at website URL http://space.geocities.jp/yusastar77/PNinM33_101129.htm.