The image was captured by the automated all-sky camera at Ladd Observatory. (no visual observations were made) The flash is just barely visible at the edge of the vignetting. The field of view is 140 by 90 degrees. South is left, and west is at top. The ten second exposure began at 03:04:19 UTC. There is nothing visible in the next or prior camera frames. I estimate that it is at or a little below 20 degrees. Please credit: Brown University Physics
