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Ár nDraíocht Féin
Three Cranes
Chaos Matrix

October 13th, 2011

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12:46 pm - An oddity about moonrise
I mentioned the other day about how I am doing moorise prayers at the moment. After just a couple of days, I find myself wondering just where this will go: each lunar month, there's a time from about the third quarter until the new moon where moonrise is in the wee hours of the morning. The moon shifts rising times between 25 minutes and a little over an hour, depending on the phase the moon is in.

I started doing this with the full-ish moon, so I have about another week until the moon starts to creep toward that point of being a little later than I normally stay up anyway, but it took only a couple of days to notice the pattern of this cycle. I have always known that a quarter moon, half moon, and full moon come up at different times, and that those times are somewhat regular, but I had never actually noticed what the difference truly is, or what the standard formula is behind it.

I love it when my religion opens my eyes to the rhythms of nature, even when those rhythms disrupt my sleep schedule a bit.
Current Location: Southeast of Disorder
Current Mood: peacefulpeaceful
Current Music: "Why Don't We Get Drunk?", -JB

(13 comments Leave a comment)


[User Picture]
Date:October 17th, 2011 12:51 pm (UTC)
As was noted at the festival this weekend, it looks like the changes in moonrise do correspond roughly to apogee and perigee. (http://www.fourmilab.ch/earthview/pacalc.html) Which shows just how much of a difference an elliptical orbit can make!
[User Picture]
Date:October 19th, 2011 01:34 am (UTC)

I know! I had an idea that the elliptical orbit might be the culprit, but I couldn't find any solid statement anywhere about it :)

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