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Flaring up?

Posted: Fri Mar 29, 2019 9:25 am
by rwilkinson
Last night, during the course of some tests with an 18mm lens, I captured a transient event near Cassiopeia:
flare.jpg
A flare event in Cassiopeia
flare.jpg (113.13 KiB) Viewed 806 times
This occurred during a 30-sec exposure just before 9pm.
I wondered if it was a meteor, but the trail looked too short and symmetrical for that. I made a "heat-map" of its intensity:
flare2.jpg
"Heat-map" of flare intensity
flare2.jpg (41.94 KiB) Viewed 806 times
So next I considered a satellite. Although the Sun had set two hours earlier, it was less than 20 degrees below my horizon, and this object was quite low in the sky (only 30 degrees elevation), so I wondered if it could have been a reflective surface on a satellite glinting in the sunlight?
The Iridium satellites are well-known for this phenomenon, but there were none in the area at that time.