Occultation of TYC 6198-00064-1 by (1909) Alekhin on 2013-03-15 Red O-: Stefano Sposetti Optics: M400 | Method: VID | Duration: 9.02,46.23,0 Red O-: Alberto Ossola Optics: M230 | Method: VID | Duration: 8.92,46.00,0