V589 Her: not an SU UMa star?

[vsnet-alert 27477] V589 Her possible superoutburst

The object faded rather quickly. ATLAS data since 2016 did not show superoutbursts. The SU UMa-type classification was based on Vanmunter in 2002. I examined the AAVSO data and the profile of the claimed superhumps did not look like very stable, and the object faded too rapidly (0.2 mag/d) for a superoutburst. The classification requires independent observation during a long outburst (but such an one is missing at least recently).

YYYYMMDD(UT) mag observer 20230225.7745 <154c (Yutaka Maeda) 20230226.3670 18.409c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.3851 18.594c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.3900 18.425c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.6306 18.390c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.6347 18.441c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.6496 19.112c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230226.7276 <160c (Yutaka Maeda) 20230227.7272 <156c (Yutaka Maeda) 20230302.3532 15.413c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.3568 15.398c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.3631 15.413c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230302.7736 148:c (Yutaka Maeda) 20230302.8352 151C (Masayuki Moriyama) 20230304.188 15.89C (Gary Poyner) 20230304.7627 <150c (Yutaka Maeda) 20230305.163 17.07C (Gary Poyner)