UFO in my garden

Exposure Date: 2012:07:28 00:10:59;
Make: NIKON CORPORATION;
Model: NIKON D200;
ExposureTime: 74.9 s;
FNumber: f/5;
ISOSpeedRatings: 200;
ExposureProgram: Manual;
ExposureBiasValue: 0;
MeteringMode: Spot;
Flash: Flash did not fire;
FocalLength: 17 mm;
Software: Adobe Photoshop CS5 Windows;