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We present observations and analysis of the first reported superoutburst ofthe dwarf nova SDSSp J082409.73+493124.4 during February/March 2007. From amaximum observed magnitude of 15.4C it declined at 0.09 mag/d for 7 days,flattened out around magnitude 16 for a further 5 days and then returnedrapidly to quiescence at magnitude 19.4. The flattening of the light curve latein the outburst was not associated with a re-growth of superhumps. For thefirst 5 days we observed common superhumps with period 0.06954(5) d, thusconfirming its classification as a UGSU-type dwarf nova. This was followed by aphase transition to late superhumps with period 0.06921(6) d. We found a smallbut persistent signal at 0.0687(6) d which we interpret as the orbital period.

Superhump periods in the UGSU-type dwarf nova SDSSp J082409.73+493124.4