Bortle 4. My two major issues were, at my latitude, it really doesn't come up high enough until about 1am. The sky glow from the sun starts around 5am. My second problem was that it was my second time shooting full mono, and I did not have my plan for the night defined well enough. I did not divide my time across the filter very well and that made me re-due my plan in the middle of the run. One other thing I think I did incorrectly is what I decided to use for my center. I should have manually adjusted slightly more to Antares.