CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code HS2331+3905 20070907.47037 9.50V Mhh.VSOLJ HS2331+3905 20070907.47166 9.50B Mhh.VSOLJ Observer: Hiroyuki Maehara (Kyoto, Japan) Instruments: 25cmL + ST-7XME + B,V filter