Steve, that table is something I thought about posting, but it is only a starting point. Sunrise for today is listed as 623 am, but there are various degrees of color way before that. There are definitions for civil vs nautical vs astronomical twilight.... the color show in the sky starts way before sunrise itself. This longest of those three periods beginning with complete darkness moving into dawn is called astronomical twilight. That is the time frame you need for the whole awakening of the heavens and the good earth below. It must be on the order of a full hour if not more, based on my eyeball and not a formula.
Twilight So, if walking up from TrailCamp to summit, one should leave for tomorrows viewing at 6:23 minus 4 hr walking
(incompletely acclimatized rate) minus 1 hr minus 1/2 hr just for good measure = 12:53 am , give or take. How does that sound?
