2010年10月29日，孙国佑在SNSP的适时看图中发现M31核心区域附近一颗可疑目标，排除各种可能后，认为是新星，上报，1天后被确认为Nova M31 2010-10d，可惜是独立发现，由于日本天黑早，被日本人抢先发现，CBET 2516判定是独立发现。
APPARENT NOVA IN M31: M31N 2010-10d
An apparent nova in the galaxy M31 has been discovered by several
Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report the discovery of a possible nova of mag 17.8 on ten 40-s unfiltered
CCD frames (limiting magnitude 19.5) taken around Oct. 29.478 UT with a
Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera). The new object
is located at R.A. = 0h42m36s.91, Decl. = +41o19’29”.9 (equinox 2000.0),
which is 84″ west and 201″ north of the center of the galaxy M31. Nothing
is visible at this position on their past frames taken on Oct. 26.550 and
27.642 (limiting magnitude 19.3 ) or on a Digitized Sky Survey image from
1986 Nov. 27 (limiting red mag 18.7). The nearest star in the Massey M31
catalogue (cf. website URL http://www.lowell.edu/users/massey/lgsurvey.html)
has position end figures 37s.01, 30″.8 (distance 1″.4; magnitudes V = 22.6,
B = 23.4, R = 22.5).
Guoyou Sun, Wenzhou, Zhejiang, China; and Xing Gao, Urumqi, Xinjiang,
China, report the discovery of a possible nova at mag approximately 18.5
on several 60-s unfiltered survey images (limiting mag about 19.5) taken by
Xing Gao in the course of the Xingming Observatory Sky Survey around Oct.
29.587 UT using a Celestron C14 Schmidt-Cassegrain telescope at Mt. Nanshan.
The new object is approximately located at R.A. = 0h42m36s.97, Decl. =
+41o19’28”.7 (equinox 2000.0), which is about 110″ west and 200″ north of
the center of NGC 224 = M31. Nothing is visible at this position on archival
images taken on Oct. 26.536 (limiting mag 19.0), Oct. 27.602 (limiting mag
19.5), or Oct. 28.661 (limiting mag 19.5). The images can be seen at the
following website URL: http://www.xjltp.com/XOSS/XM10AK/XM10AK.htm.
Kamil Hornoch, Astronomical Institute, Ondrejov, reports his discovery
of an apparent nova in M31 on a co-added 1260-s R-band CCD frame taken on
Oct. 29.729 UT with the 0.65-m telescope at Ondrejov. The new object is
well visible on the co-added frame, as well as on single images used for
the co-added frame, but is not present on numerous archive images taken at
Lelekovice and Ondrejov. The object is visible also on a pre-discovery
Ondrejov R-band CCD frame taken on Oct. 28.719 UT. Available R-band
magnitudes for M31N 2010-10d, measured by Hornoch: Oct. 22.934 UT, [20.6
(K. Hornoch and P. Hornochova, 0.65-m telescope at Ondrejov); 28.719, 19.8
+/- 0.25 (Hornoch and M. Wolf, 0.65-m telescope at Ondrejov); 29.729, 17.85
+/- 0.1 (Hornoch, 0.65-m telescope at Ondrejov). M31N 2010-10d is located at
R.A. = 0h42m36s.91, Decl. = +41o19’29”.6 (equinox 2000.0), which is 84″ west
and 201″ north of the center of M31.
NOTE: These ‘Central Bureau Electronic Telegrams’ are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2010 CBAT
2010 October 30 (CBET 2516) Michael Rudenko