Table:
text: 2008–09 Adelaide United season
Season
Attendance
Round Date_ Home_Team Away_Team Attendance Stadium
9 26 October 2008 Adelaide United Perth Glory 10126 Hindmarsh Stadium
10 31 October 2008 Adelaide United Melbourne Victory 13191 Hindmarsh Stadium
11 15 November 2008 Central Coast Mariners Adelaide United 7865 Bluetongue Stadium
12 22 November 2008 Adelaide United Sydney FC 9509 Hindmarsh Stadium
13 30 November 2008 Newcastle Jets Adelaide United 7136 Energy Australia Stadium
14 5 December 2008 Adelaide United Wellington Phoenix 9442 Hindmarsh Stadium
15 6 January 2009 Melbourne Victory Adelaide United 27196 Telstra Dome
16 14 January 2009 Adelaide United Queensland Roar 14450 Hindmarsh Stadium
17 26 December 2008 Perth Glory Adelaide United 12581 Members Equity Stadium

Question: What is the smallest round for the game to be played in Adelaide United with 12,581 spectators at Members Equity Stadium in season 2008/09?