ISS Lunar Transit
Composite of 13 exposures showing a lunar transit of the International Space Station. Photographed from Croyle Township, Cambria County, Pennsylvania, USA at 2016-05-28 08:45:48 UT. The duration of the transit was 1.3 seconds. The distance to the ISS was approximately 715 km and its angular size was about 39 arcsec. Planning for the transit was done using CalSky.com. Pentax K-5 II, Pentax DA* 300mm f/4, Tamron 1.4x teleconverter. Exposures were 1/2000 second with the lens set to f/4 (for an f/5.6 effective aperture with the teleconverter).