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The Sydney Opera House is SOUTH of the Tropic of Capricorn, or OUTSIDE your orange circle. The date is IRRELEVANT, because the sun is ALWAYS NORTH of this location. The time of day is early, just after sunrise. The daylight picture from above shows the shadows to the SOUTH of the OH. The sunrise photo shows the sun to the SOUTHEAST. Your hypothesis is trashed, your model is worthless, and your conspiracy is debunked.
Sydney, NSW, Australia: Latitude and longitude coordinates are: -33.865143, 151.209900. (source: http://www.latlong.net/place/sydney-nsw-australia-700.html)
"The Tropic of Capricorn is one of the five major circles of latitude that mark maps of Earth. As of 12 July 2017, its latitude is 23°26′13.2″ (or 23.43701°)[SUP][1][/SUP] south of the Equator" (source: https://en.wikipedia.org/wiki/Tropic_of_Capricorn)
Sydney, NSW, Australia: Latitude and longitude coordinates are: -33.865143, 151.209900. (source: http://www.latlong.net/place/sydney-nsw-australia-700.html)
"The Tropic of Capricorn is one of the five major circles of latitude that mark maps of Earth. As of 12 July 2017, its latitude is 23°26′13.2″ (or 23.43701°)[SUP][1][/SUP] south of the Equator" (source: https://en.wikipedia.org/wiki/Tropic_of_Capricorn)