posted May 10, 2016 10:31 PM            

I think you have the thread titled wrong.

It should be our there any physicists or anyone good with math for astrology. Remember each branch of math is meant to solve a different type of problem.

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Gemini Sun,
Capricorn Rising
Aries Moon
Gemini Mercury
Venus Taurus
Mars Cancer

posted May 10, 2016 11:12 PM            

quote:

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Originally posted by athenegoddess:
I am trying to figure out how rare a certain astrology configuration is. Can anyone help?

It is a full moon conjunct neptune. all exact.

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Every year the sun is opposite Neptune one time.That seems like the best way to start a search since Neptune moves so slowly.
How much orb do you want to allow for the moons conjunction to Neptune and How close do you want the full moon to be to exact?
Without limits > like just full in the same sign or 13-14 degrees(a day of lunar travel) or withing 5 degrees.
Neppers ingress Cap in January 84, so first sun Nep opposition would be June 21 1982 while moon was way over in Pisces.
In 31 years I found 2 in same sign or rather 1 just past a days travel , one inside a days travel, and the one last
year which was the only one with moon full and 2 degrees 25 minutes of Neptune appl.
So I say likely have to look at a 100 year span on the low side, to call a percentage,, better to do 500, but that is a lot for work.
I have noticed a small pattern but not sufficient to create a formula.
At each Sun and Neptune opposition the moon is in the sign quincunx to the one it was in before or more rarely in the sign opposite to the sign it was in at the previous one.
I am NOT quick enough to grasp how that helps me just yet. If that pattern continued over a 100 years and we only had two conjunctions(with 5 degrees) I would not be surprised. However it might give a clue to a formula. I don't know. What I can say is there is not a close one in each sign.
165/12=13.75 yrs

I just leaped backwards in time,,, by sign,, to 21 Mar 1943
22:07:57
gmt
FM 0LI25 with Neptune at 0LI42.
Now I just need to look at every op between then and Jun 1984 to see if there was another
close one in that span.

2 YEARS later Full Moon Mar 28,1945 at
7li40 with Neppers4li59. so within 3 degrees.

posted May 11, 2016 12:06 AM            

Would love your help!

Yes, exact. Under one orb.

posted May 11, 2016 01:31 AM            

quote:

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Originally posted by athenegoddess:
Seimei,

Would love your help!

Yes, exact. Under one orb.

The Sun is opposite Neptune every year, but how often does it coincide with a Full moon? An exact one?

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How often is a tricky question as you can see, one 25 year look will not be the same as another 25 year look,, maybe from Cardinal ingress to the next, is not the same in each 165 year period. I do not intend to look at 3 165 year periods in the span of two weeks,, other stuff to do.

posted May 11, 2016 10:14 AM            

quote:

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Originally posted by athenegoddess:
Wow. Thanks for giving it a shot.

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RECAP AND REFINEMENT/corrections
21 Mar 1943 FM 00LI25 w/ Neptune at 0LI42.
nine years here
10 Apr,1952 FM 20LI20 w/ Neptune at 20LI20
30 Apr,1961 FM 10sc10 w/ Neptune at 9sc56.
20 May,1970 FM 29SC40 w/ Neptune at 29sc31
10 Jun,1979 FM 19SA01 W/ Neptune at 19sa07
so five in a row all within a degree every 7 OR 9
years so let me re-look at 1986

Jun 21,1986 FM 00CP26 with Neptune at 4cp32.

So that is not within your criteria of 1 degree and broke
with the preceeding set on that.
Jump 7 years 3 Jul 1993 ,,,,, FM at 12cn01 and Neptune 19cp59 so even further away.

at this point I decided to leap backwards again from 1943 to 1936
and> 8 Mar 1936 FM at 17vi28 with Neptune at 15vi20.

So quickly back another 7 years to 1929 , click back 20 days and start looking, Feb 23 1929 at 4vi41 and Neptune is 5 behind at 29le52
The issue here seems to be that when Neptune is in RX its speed will vary naturally.
What is shown with the two 2 year sequences 43 & 45 then 52 & 54 is because of retrograde motion as well and should repeat itself in each 165 year period but exactly where that period begins and ends is astronomical information I DO NOT HAVE.

Forward from 1993 > 7 year >

what the hell
The moon is closer to the sun when Sun is op Neptune SO that 7 idea gets broken or interrupted,, back up >1999
28 Jul 1999 FM 4AQ57 with Neptune at 2aq55

posted May 11, 2016 01:51 PM            

A Full Moon happens about once a month, or about 13 times a year (lunar calendar being what it is). Every Full Moon has a chance of being conjunct Neptune one time out of 180 (again, allowing a 1° orb), or once every (180/13=) 14 years or so on average.

Average is considering all of the life of the solar system, and in any small slice of time (like in any given century) the frequency will vary.

posted May 11, 2016 05:13 PM            

quote:

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Originally posted by Seimei:
From a Theorycraft point of view, the Moon is conjunct any planet 1 time in 180 if you allow an orb of 1°. (1° on either side of the point allows an arc of 2° out of 360°. 360/2=180)

Gemini Blues,
seems to me that idea is applicable with one stationary object

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It's close enough given the speed of Neptune vs the speed of the Moon. Neptune isn't going to be racing ahead.

Then again, even with a planet like Mercury, the Moon is going to be conjunct it at some point every 28 1/4 days on average. Just the variance will be greater. Longer or shorter depending on Mercury direct or Rx.

posted May 11, 2016 06:27 PM            

Looking at it from a top down perspective, it would be in orb twice per orbit. Once as it passed in front, and again as it passed behind, so 1/90th of its time spent in orb. But as an inner planet. We don't see it the way we see outer planets. We see it move slower when its moving the "same direction" as us, and faster when moving in the opposite direction. And "standing still" when moving toward or away from us (when it's transitioning from one to the other).

Here's the thing. The amount it gains by being slower when conjunct and moving direct should equal the amount lost by moving faster in retrograde. They should cancel out and still be about 1 in 90. The period of Mercury's orbit shouldn't affect the outcome other than that, because we are only asking for the fraction of time Mercury spends conjunct the Sun.

One further observation. I'm assuming circular orbits, while planets have elliptical ones. The time spent conjunct would vary by where the planet was in its orbit. But that too gets averaged out over long enough periods of time.

So, my prediction would be that the inner planets would be conjunct the Sun on a full moon once about every 7 years, while the outers would be every 14 or so.

posted May 11, 2016 07:31 PM            

So Neptune has about 1/12th (roughly 8%) chance of being in any sign, at any given time. Then it has a 1/30th (roughly 3%) chance of being in a particular degree of that sign. 8/30 = .26

That is the chance of Neptune being at a certain degree, I think?

The other fixed constant is one full moon every 28 days, with 30 degrees in each sign.

There is a 1.07% chance of the full moon happening on any degree.

.26 x 1.07 = .27% chance of the full moon happening conjunct Neptune.

About one third of a percent chance, every full moon, that it will be conjunct Neptune?

365 x .27 = 98...every 98th full moon is conjunct Neptune

98 x 28 = 2759 days
2759/365 = 7.8

posted May 11, 2016 07:40 PM            

I think it's 1.07/12 = 0.089167 ℅ chance. I think you did chance of a degree without considering also sign.

posted May 11, 2016 07:50 PM            

.26 x .08 = .02

So one fifth of a percent chance that a full moon will be conjunct Neptune?

Edit, edit, edit...

360 degrees/days x 30 years = 10,800 days -> time span in which each degree is statistically likely to be represented

10,800/28 (one full moon per 28 days) = 385.7 day constant cycle in which the one fifth % constant is applicable

385.7 x .02 = 7.14
385 x 7.14 = 2,970
2,970/365 = 8 ish