Boyson Park Trail Star Trails

This camera position looking southeast, located on the Boyson Park Trail near Donnelly Park in Marion, Iowa, captured an individual 30-second exposure (bottom image) and a stacked combination of 104 exposures (top image) in the predawn hours of Saturday, July 28, 2012. The total exposure time for the top image was one hour (from 3:00-4:00 AM) and includes the streak of the communications satellite Iridium 6 (at center, just right of tower). Each exposure (including the single one at bottom) was shot at f/3.5, 320 ISO and 18mm focal length. The circled area above and right of the tower at bottom shows the dim 5.78 magnitude planet Uranus at 3:15 AM.