ASASSN-18su (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=623474
ASASSN-18su was discovered on 2018 August 17. Unfortunately that outburst could be followed for only few days. After the seasonal gap a very long fading tail can be seen in ATLAS forced photometry data.
T. Kato wrote (vsnet-alert 22429): "The Gaia proper motion is comparable to that of OV Boo ... ASASSN-18su looks likely a population II CV candidate."
The current outburst was detected by Rod Stubbings at mv= 11.3 on 2022 June 28.537 UT (vsnet-outburst 28822, vsnet-alert 26852).
It had already started on June 24 and is 1.5 magnitudes fainter than the 2018 outburst according to ASAS-SN Sky Patrol data: https://asas-sn.osu.edu/sky-patrol/coordinate/52d16cd1-3548-431f-a7fc-326e35...
Time-resolved photometry is urgently required.
Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T