[PeterM]

Why should you be ridiculed... you saw something you couldn't explain and you haven't jumped to conclusions.

But I am curious "I opened up Flight Radar on my phone and confirmed that the Jet was QF647 Perth to Sydney F410." no images or video taken of said object I guess or you would have posted them.

This could also well be a serious matter with a commercial airliner being in the vicinity, might be worth contacting the relevant flight people/airline to see how they respond. Maybe it was seen by the crew etc?

I know you guys have aviation backgrounds but a plane at such distance and from the ground is there a likelihood of a distant but much lower drone, bird etc that would be hard to distinguish in the line of sight?

In saying that have I ever seen anything really odd in 45yrs ... well yes, three "stars" moving across the night sky in a triangle in the nineties... turned out to be from memory a secret US defence triangulation satellite system. That took some searching and Tony (Firstlight) also saw it from Warwick Qld
I also saw the satellite tether (changed from tool box to satellite after I googled it) that broke away from the Space Shuttle years ago under very dark skies - I think 1996.. very eerie but I knew approx where to look was hoping to see something - unfortunately no camera phone.

There is no reason to be ridiculed here, indeed it would be very wrong. Your wording is sound and you haven't implied anything other than you saw something you can't explain at the moment.