I recently spent 20 minutes filming the wrong spot of the sky. I knew that some Starlink satellites were due to flare due West of me, so I got out my Theodolite app and pointed it West (270°) to see what I should be looking at.
That was great, because it was a gap in the trees. So I zoomed in with my long lens, and nothing showed up.
The problem was the compass in my iPhone was wrong, in fact it was off by about 13 degrees. Now 13° is the difference between true north and magnetic north here in Sacramento ... Read even more
