Аннотация:AT2021acet MASTER-IAC auto-detection system ( Lipunov et al., “MASTER Global Robotic Net”, Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 09h 11m 12.50s +17d 33m 44.0s on 2021-10-26.16918 UT with unfiltered m= 15.8m (mlim=18.8).