Dear colleagues, Further to the superhump period value of the new SU UMa variable RXJ1450.5+6403, reported in VSNET-ALERT 4843, we have received additional and extensive CBA time-series photometry runs from CBA Maryland (Dave Skillman), CBA Braeside (Bob Fried) and CBA Belgium (Tonny Vanmunster), bringing the total number of available observations to 1881. After removing linear trends, we have analysed the superhump periodicity using the PDM method and have determined a value of 0.0600 d +/- 0.0002 d, which is close to the value reported earlier in VSNET-ALERT 4843. The superhump amplitude is about 0.40 mag. We strongly recommend continued effort in tracking Psh and in monitoring possible Psh period changes. With kind regards, Tonny Vanmunster (CBA-Belgium) Dave Skillman (CBA-Maryland) Bob Fried (CBA-Braeside Observatory) PS : I'll be staying abroad for the next 2 nights and thus won't be able to reply to RXJ1450.5+6403 messages received in that period. Sorry for that.