Hi ,
I have been looking into IX Dra and its status as a “period bouncer” reported by Olech, A. et al 2004.
Their Fig 12 places IX Dra as a period bouncer. It turns out that decision is based upon an accurate understanding of the difference between P(sh) and P(orb). Determining P(orb) has not been easy. Thorstensen has recently (2020) determined P(orb) accurately and to check I looked at the TESS results for IX Dra. TESS date from the normal outburst sections of the light curve agrres with Thorstensen. So IX Dra can be moved to the upper branch of the curve in the attached figure and join its ER Uma cousins.
Stewart
