CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code SN2010jo 20101115.476 17.2CR San.VSOLJ Observer's code: San: Yasuo Sano (Nayoro, Hokkaido,Japan) Instruments: 40cm-SCT + STL-1001 30s exp. Comparison stars: Magnitudes based on UCAC3 stars,