DDE 163 = 1RXS J185013.9+242222 (UGSU:)
In outburst on 2019 June 9. Two previous outbursts were recorded by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K): a long outburst (supermaximum?) 2015 Feb. 17–20 and a very short (normal?) outburst on 2018 Oct. 27.
*** Time-resolved photometry is strongly recommended. ***
DDE 163 may be rebrightening today (to a supermaximum?) according to the latest ASAS-SN Sky Patrol data:
***Time-resolved photometry is urgently required. ***