Deepest ever observed minimum of SU Tau

  observer: Makoto Iida (VSOLJ)
  instruments: 20-cm refl. + ST-6 unfiltered
  date & time: 1996 Feb. 12  11h 46m UT
  exposure: 120 s

SU Tau is located at the center. The object is estimated to be as faint as 17-th magnitude even with a red-sensitive CCD. The variable may be further fainter in the V-band, probably attaining the faintest ever observed minimum of this R CrB-type star.