Occultation of TYC 1881-01174-1 by (177) Irma on 2011-10-03 Green O+: A. Leroy/A. Leroy Optics: L102 | Method: VID | Duration: 2.90 2.71,48.90,0 Red O-: J. Lecacheux/E. Meza Optics: M1020 | Method: VID | Duration: 2.23,48.80,0