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Location of Photo:

Goleta, California (near Santa Barbara)

Date/Time of photo:

December 29, 2020, 10:11:33 a.m. PST


Canon 5D Mk IV with Tamron 150-600mm zoom lens at 600mm, Gitzo tripod with Arca Swiss Monoball head


This image is a composite of screen grabs of every other frame of a 4K video shot at 30 frames per second. I used a 600mm lens with a solar filter. The exposure was f/6.7 at 1/2000 sec, ISO 3200. The transit duration was 1.8 seconds. ISS angular size: 32.88″; distance: 840.45 km Angular separation: 0.2′; azimuth: 151.6°; altitude: 26.7° Center line distance: 0.02 km; visibility path width: 8.75 km Transit duration: 1.80 s; transit chord length: 32.5′ R.A.: 18h 37m; Dec: -23° 10′; parallactic angle: 24.5° ISS velocity: 18.1 ′/s (angular); 4.41 km/s (transverse) ISS velocity: 5.93 km/s (radial); 7.39 km/s (total); Direction of motion relative to zenith: 151.1° Sun angular size: 32.5′; 59.4 times larger than the ISS




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