We performed photometric monitoring and time-resolved observations of NY Ser between 1995 July 25 and 1997 March 11. NY Ser shows normal outbursts with a recurrence time of 6–9 days and superoutbursts with a recurrence time of 85–100 days in the range of 14.6–18.0 mag in the V band. The superhump period is 0.106 (± 0.001) d, which suggests that the orbital period is located near to the middle of the period gap.
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Nogami et al. (1998) studied this question.