Аннотация:https://www.astronomerstelegram.org/?read=15568 MASTER OT J185634.89-645541.6 discovery - young PSN in IC4790MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )discovered OT source at (RA, Dec) = 18h 56m 34.89s -64d 55m 41.6s on 2022-08-20.11787 UT.The OT unfiltered magnitude is 16.0m(mlim=19.6).The OT is seen in 11 images, for ex.:2022-08-20 02:49:44 16.02022-08-21 03:04:48 15.52022-08-23 06:16:47 15.0We have >1000 reference images since Dec 2014, for ex.:2022-08-03 01:05:15 with unfiltered mlim=19.5m 2018-06-20.33105 UT with unfiltered mlim=20.1m.Spectral observations are required.The discovery and reference images are available at:http://master.sai.msu.ru/static/OT/185634.89-645541.6.png