FH Lyn: (almost) overlooked rare outburst in early May

SS Cyg star, but this would be worth documenting. First known since 2020 Sep.

YYYYMMDD(UT) mag observer 20230430.5377 <159c (Yutaka Maeda) 20230501.5478 <157c (Yutaka Maeda) 20230501.5755 <164C (Masayuki Moriyama) 20230502.2405 17.553o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2437 17.752o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2509 17.389o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230502.2647 17.575o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.2551 16.380o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.2579 16.389o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.2645 16.358o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230504.2768 16.394o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.3106 15.012o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.3144 14.954o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.3212 15.165o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230506.3316 14.981o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1781 16.180zr (ZTF Alert DC mag (Masci+ 2019)) 20230509.5657 168C (Masayuki Moriyama) 20230510.4901 <160c (Yutaka Maeda) 20230514.2669 18.078c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.2723 17.880c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.2771 18.013c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.2968 18.145c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.5088 <153c (Yutaka Maeda) 20230515.5047 <155c (Yutaka Maeda)