This short video serves to demonstrate the crowded sky now above us.
It features a time-lapse sequence shot on the night of June 1-2, 2022 from southern Alberta, Canada at a latitude of 51° N.
At that time of year near summer solstice, and at that northerly latitude, even low-earth orbit satellites are visible all night long, as they are always illuminated. The Sun never sets for them at their altitude of 300 km and higher.
I don’t think any of these are SpaceX StarLink satellites - at least none of the satellites recorded seem to be following along a similar path in a close string, as is the case with newly launched StarLinks.
So this crowded sky can’t be blamed on Elon Musk!
Also, a few of the trails - the coloured and dotted ones, usually low across the south at bottom - are aircraft. A couple of meteors also show up briefly on one frame.
TECHNICAL:
This is a sequence of 725 frames, each 20-second exposures at ISO 1600 with the Canon R5 camera and TTArtisan 11mm full-frame fish-eye lens at f/2.8. The camera was on the Star Adventurer Mini tracker to follow the sky - thus the turning ground but stationary sky. Tracking the sky allows the moving satellites to show up better, as the stars don’t trail, only the satellites.
The sequence is presented twice:
The first is assembled normally a rate of 24 frames per second, in this case using LRTimeLapse software for the processing and movie assembly.
The second is assembled with groups of adjacent 7 frames (not 8 as in the on-screen caption) blended with a Lighten mode to create lengthier satellite trails, to make them even more obvious. I used the TimeLapseDeFlicker program to assemble the second clip, for its excellent Average and Lighten blend modes.
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