V419 Lyr possible superoutburst YYYYMMDD(UT) mag observer 20230520.672 <174C (Mitsutaka Hiraga) 20230521.4207 19.038zr (ZTF Alert DC mag (Masci+ 2019)) 20230523.592 <174C (Mitsutaka Hiraga) 20230523.7581 <159c (Yutaka Maeda) 20230523.7767 <178C (Masayuki Moriyama) 20230525.7397 <178C (Masayuki Moriyama) 20230602.7119 154C (Masayuki Moriyama) 20230604.6412 155C (Masayuki Moriyama)