Аннотация:MASTER OT J211258.65+242145.4 - new CV MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 21h 12m 58.65s +24d 21m 45.4s on 2012-06-24.85937 UT. The OT unfiltered magnitude is 12.9m (limit 18.9m). The OT is seen in 3 images with the following automatic unfiltered magnitudes: 2012-06-24 20:03:36 UT 12.85 2012-06-24 20:37:29 UT 12.94 2012-06-24 21:12:04 UT 12.90 We have MASTER-Kislovodsk reference image without OT on 2010-10-26 17:55:44 UT with unfiltered magnitude limit 19.3m.