Streetcap1 has turned the object 90 degrees on several frames to get a better idea of it's construction. The first two frames have a 180 degree turn.
The object only appears on one photo from a series of photographs that show the same region in space which would mean that the object has moved during the photo shoot.
Since the space photo was taken in 1970, a time when there were only a few satellites we assume that the object is of extraterrestrial origin.
NASA Photo Link: http://www.lpi.usra.edu/resources/apollo/images/print/AS13/62/8987.jpg