Yesterday afternoon, at 4:22pm, I photographed British Airways FL BA197, a 747-400, traveling at 500 kts and 38,000 ft above my driveway in Winthrop, Massachusetts, with a Tail # G-CIVW, flying from London to Houston. I used a 1600mm lens on a tripod at 1/640th of a second at F11 at 10,000 ISO (asa). Tonight, 24hrs and 5 minutes later, I photographed the same flight number, this time at 38,000′, and traveling a little slower, at 443 kts. This time I used the photography method called “panning.” I used a tripod, 1600mm lens, and an ISO(ASA) of 1250. My camera settings were  1/15th of a second at F11. The plane was also a 747-400 but the tail # was G-BYGD. It is amazing that tonight’s flight was only 5 minutes later than last night’s, given that this bird is 3300 miles from London. Below top is last night’s flight. Below bottom is tonight’s flight.