Nighttime pastels

First time out this season to see if my favorite convenient dark site is still dark enough to see the Milky Way. It is, but encroaching urban light pollution continues to gradually degrade seeing. It had been a very warm afternoon, so I imaged enough photons to show subtle chemical florescence from oxygen, nitrogen and hydroxide molecules that were, even after midnight, emitting light from the energy absorbed earlier in the day.

Canon 6D Mk II DSLR, Tamron 19-35mm lens at 19mm, large tripod with ball mount, remote shutter release. Approx. 100 frames in groups of 10-20 exposures each, 25-30 seconds per exposure, most 6400 ISO, a few at ISO 8000 and even 10,000, f/3.5.

Stacked into groups using Sequator, then stitched using Image Composite Editor, then GIMP to crop, sharpen and boost saturation. Plus many cups of coffee.