V551 Sgr: refined superhump period Dear Colleagues, The VSNET Collaboration has received new superb data sets (3 nights) from Greg Bolt. The data show distinct superhumps. The analysis of the data up to now has yielded a refined superhump period of 0.06748 d. Although the period derivative up to now is virtually zero, there seems to be even slight indication of period lengthening, which is relatively rere at this superhump period. Further observations are strongly encouraged; the best target before getting RU Hor observation! Regards, Taichi Kato VSNET Collaboration team
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