I’m not really sure what you’re asking…
I am assuming it pertains to 2012 and the Mayan Calendar? I assume this because of “galactic alignment” and the number 25,000-26,000ish number you ask about… my mind only makes sense of both in light of the Mayan Long count.
I recall reading a theory a few years back about the meaning of the Mayan’s “calender end” date of 2012, December… 21ish (?) involving a 25,000ish number. 2012 as the predicted time where the sun’s solstice point aligns with a “galactic equator”… which is like an equator to the Milky Way galaxy as earth’s equator is to it–separating it into north and south poles. Is that what you are talking about? 25,000 thingish years as the cycle between the sun’s “galactic alignments”?
Are you trying to obtain a more confident estimation of the December 2012 date?
Well, whatever you may think, I don’t know much about that Galactic alignment idea, only that it assumes I only know of it resting on the assumption the Mayan Calendar “ends” at the December 2012 date, which people who have thoroughly studied the culture, language and glyphs think isn’t an accurate way of seeing it. Long count dates are usually written using 5 numbers, each (from left to right) referring to a cycle (of a number of days) that includes a number of cycles in the next number (cycle), each number goes back to zero when it “completes”–adding one (showing the start of a new cycle) to the cycle to the left. 13.0.0.0.0 has been interpreted as the Dec 21 2012 date, and there have not been any 5 digit long count dates that exceed it.
That, as well as records of things “ending” (interpreted as gods coming down, the word ending, whatever) have led many to claim it refers to an “end of the world”, but most with extensive knowledge and research of the calendar (and the ability to decipher the glyphs) see it as an end of the 13th baktun cycle–the first baktun, as well as the first date/day of the 5 digit long count, beginning 1.0.0.0.0, which correlates to August 11 3114 BC. The thing is, 1.0.0.0.0 doesn’t necessarily ONLY refer to a single date in the Roman calendar–there are rarely used cycles that are sometimes used to refer to project events in the distant past or future. For example, one glyph referred to some distant celebratory anniversary of a king that was written in some long count date less than 13.0.0.0.0, but the date is put into perspective by another specified cycle/start point, that results in a date thousands of years from now.
…Having said all that, if I were to give an answer to your question, based on the Mayan Calendar (though I can’t claim it as accurately referring to a “galactic alignment”), I’d say 25,626.28.
I got this number by taking the number of days between 1.0.0.0.0 and 13.0.0.0.0 (13 x 144,000)–which comes to 5125.256 years, when dividing the total days by 365.25, and then multiplying by 5.
I don’t know of any Mayan cycle that refers to this span of 25,625 years, though. But I don’t know all that much about the calendar.