Cooper was aboard a 12-person Dassault Falcon 900B jet chartered from Bermuda. The flight made a perpendicular crossing of the central shadow track. After only an instant of totality, this snapshot captured the lunar disk in silhouette. Rays of sunlight shining past peaks and valleys along the lunar limb created the fleeting appearance of a glistening diamond ring.
In a detailed blog post, Cooper goes in-depth on how he got this particular shot as well as documenting the whole trip, including more photos of this awesome phenomena.