Representative averaged magnitudes: Unfiltered CCD magnitude: SCOU 990312.692 14.07C Oud extinction effect SCOU 990312.725 13.99C Oud SCOU 990312.756 13.96C Oud SCOU 990312.792 14.01C Oud SCOU 990312.833 14.06C Oud Comparison star: GSC6206.372 162227.64 -174857.5 (2000.0) 13.67 0 GSC6206.372 162227.66 -174856.9 (2000.0) 13.73 0 USNO0675.10698092 162227.652 -174857.02 (2000.0) 12.3 15.0 USNO r mag 12.3 assumed. observer: Ouda team (K. Matsumoto and T. Kato) telescope: Ouda team rooftop station, 25-cm SCT + ST-7 unfiltered