Occultation of HIP 91657 by (6072) Hooghoudt on 2017-08-04 Red O-: Michal Rottenborn Optics: M303 | Method: VID | Duration: 13.33,49.71,0 Red O-: David Vizzoni Optics: M200 | Method: CCD | Duration: 10.27,43.95,0 Red O-: Florian Signoret Optics: M400 | Method: VID | Duration: 7.07,43.60,0