Location of photo37 51.8076N 122 18.8286W
Date/Time of photo6/5/2012, 22:23:45 UTC
EquipmentSCT 6" f/10
Focal Reducer-Field Flattener f/6.3
Baader film continuum full aperture filter
B/W 1/2" Video CCD
GPS Time transfer +/-0.1 milliseconds
DescriptionIngress stages during Venus Transit 2012.From left to right, the stages: a snapshot before the first contact, a snapshot at the first contact, a snapshot during the second contact, three snapshots after the first contact. The black drop Effect is clearly seen during second . A possible hint at the sunlight refraction by the Venus' atmosphere can be discerned from the last snapshot. The absolute timings are GPS time transfer timings. Expected timing accuracy +/- 0.1 millisecond. The obsrvation location is 37 51.8076N 122 18.8286W.