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How does that sound? Ooof!! Way too early for me!
That NOAA site where I got the table also lets you run the numbers for civil, nautical, and astronomical twilight -- even moonrise and moonset! They have a link to their faq, where they explain the terms:
Rise, Set, and Twilight Definitions Steve, that's a great calculator. Thanks . So using it for Lone Pine, adding an hour for DST , I get astronomical twilight for today as starting at 452am. It would be even earlier on the summit. Do the rest of the math, and yes, an early start is needed indeed.
