V589 Her outburst

Changed from UGSU to UG recently.

YYYYMMDD(UT) mag observer 20230605.3868 <16.923g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.1680 <16.440g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.2134 17.558zr (ZTF Alert DC mag (Masci+ 2019)) 20230609.5366 <141c (Yutaka Maeda) 20230612.066 15.06C (Gary Poyner) 20230612.0660 14.91C (Masao Funada)