I thought I’d try a visual observing session for tonight. The sky was good for an urban evening, though still with the usual light sources around the observatory. My neighbour’s yard lights are still on as I write, and won’t go off until around 1 am, and more distant house lights — so-called security lights — won’t go off at all. The observatory walls shield me from much of that, and right now the major light source is the screen I’m using to enter these notes. However, when that’s turned off I am still not in deep darkness.
I made up a list of Messier objects. M57 was a pale and ghostly ring, but as for any of the others, no joy in seeing them — the background haze has swallowed them all. Visually the night is a bust.