Woke up early this morning, about 3 am, AZ time. It took some time to find the comet and Messier 3; later I realized when I was editing the pictures that Comet Leonard and M3 were behind some trees. Finally, they were high enough for me to image them.
I set the intervalometer for 90 seconds, and let it go.
I stacked 21 of them, with some darks, about 10. So, it was imaged between 4 - 5 am.
A wonderfully successful session.

Canon 6dmkii. Tamron 150-600mm lens. Ioptron Skyguider Pro. Manfrotto tripod.
Intervalometer.

Spent time to edit the photos in Lightroom. Stacked in Sequator. Edited a bit more in Lightroom.