Please see discussions.flightaware.com/viewtopic.php?t=1042 for the inspiration for this request.
I took the picture from a known flight number and time. Given that, it should be possible to use the database here at flightaware.com to determine the identity of the other plane.
Had I been on the ground at the time and knew I wanted the info, I probably could have gotten it. Now, my own flight details seem to be relegated to the archives and inaccessible to me. I’d still like to know what that flight was…
Additionally, this seems like a feature that could be of general interest.