TYC 2255-01354-1 Duplicity Discovery from Asteroidal Occultation by (790) Pretoria

An occultation of TYC 2255-01354-1 by the asteroid 790 Pretoria on 2009 July 19 showed this star to be a double star with a separation of 144.8 +/- 0.4 mas, PA 192.4 +/- 0.2 degrees. Both components of the double star were occulted as seen by all observers. The magnitude of the primary component is estimated to be 10.63 (VT). The magnitude of the secondary component is estimated to be 10.83 (VT).