PNV J00461912+4144364 2012 12 26.4863* 00 46 19.12 +41 44 36.4 17.0 U 2422E1708N M31 N 0
2012 12 26.4863
Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report the discovery of a possible nova .(mag.= 17.0) in M31 on seven 40-s unfiltered CCD frames taken around 2012 Dec. 26.48631UT, ( limiting magnitude = 19.5 ) using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera). as follows Nothing is visible at this location on our past frames taken on 2012 Dec. 11.527 UT (limiting magnitude = 19.7). and Dec. 12.467 UT (limiting magnitude = 19.7) . We have checked in Minor Planets. Nothing is visible at the position of possible nova on the Digitized Sky Survey(POSS2/UKSTU) from 1986 Nov. 27 (limiting red mag 19.3) and 1993 Oct. 21(limiting infrared mag 18.9). the nearest star in M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) has position end figures 18s59, 10."9, distance 26."2, magnitudes V=15.2, B=15.9, R=14.8
2012 12 26.528
Mag.= 16.9, position end figures 19s.12, 36".3 observed by T. Noguchi, Chiba-ken, Japan, using 0.23-m f/6.3 Schmidt Cassegrain + unfiltered CCD with 4x40-s exposure under the limiting mag.= 18.0. Position and magnitude were measured using UCAC3. An image was posted at http://park8.wakwak.com/~ngc/images/PNVinM31.jpg.
2012 12 29.07681
Mag.= 16.6, position end figures 19s.12, 36".1, remotely using 0.25-m f/3.4 hyperbolic astrograph + unfiltered CCD (SBIG ST-10XME) at RAS observatory near Mayhill, NM, U.S.A. (H06). Position and magnitude were measured on an image composed from 3-frames which were taken by each 120-seconds exposure under the limit magnitude = 18.5. Observer T. Yusa, Osaki, Japan. http://space.geocities.jp/yusastar77/supernova/PNinM31_121229.htm