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Literate Chaotic / Re: 4cast4
« on: June 16, 2009, 11:13:52 pm »
note to self 1/sp=1/j-1/s (synodic period
thE following MatLic propgram was an approximation to
A GRaphic Solution to the conjunctions of Jupiter with
Saturn (about TWEnty year PEriod}?
http://www.astropro.com/features/tables/geo/ju-sa/ju000sa.html
j=11.86; s=29.46; sp=(j*s)/(s-j);x=0:.31416/2:74;o=0*x;
c=0:.08:70;sj=sin(x/1.9);ss=sin(x/4.7);sd=sj-ss;
plot(x,ss,'mo',x,o,x,sj,'go',x,sd,'r+')
for n=1:4, j4(n)=j*n; s4(n)=s*n; end
j4, aj=abs(sj); bj=find(aj<.02); cj=bj-1; dj=cj*.31416/2
s4, as=abs(ss); bs=find(as<.02); cs=bs-1; ds=cs*.31416/2
sp, ac=abs(sd); bc=find(ac<.02); dc=bc*.31416/2
THe main problem is the step in x=0:step:end;
1 I DO want the X aXis marked off in years
2 I want the plot of Jupitors orbit to = j (11.86)
3 Want Saturn = s (29.46) 4 and "o" on Zero (0) crossing
currently :" 12:43 PM 20090628 ": parameters elude me
i'll list 5 .1 Step, .2 sj=sin(x/?), same for ss ...
3? trying to get "o" to plot on Y=Zero at crossing = 11.86 & 29.46
3a this requires tweeking of the devisor to x computing the SIN ?
4 I call the Sign Differance sd which should zero at conjunctions
5 obviously?/? there must be a better approacH (this1 was iteratively
in closing I will say something along the line of YES?making the step smaller helps getting a ZERO on the axis crossing
MAKING STEP bigger makes it more difficult. REMember i approach
all this nonScience from the ill-Logical negativism window ...
ei MEaning the Sin Differance sd is derived from sj-ss {Negative wAY
YES D: any reel help would be APEriciated
THE JUPITER-SATURN CONJUNCTION See link
DATE | TIME | ARC | JUPITER | SATURN |
|DEC 31, 1980 | 09:17 PM | 000 | 09LI30 | 09LI30 |
|MAR 04, 1981 | 06:55 PM | 000 | 08LI06R | 08LI06R|
|JUL 24, 1981 | 04:13 AM | 000 | 04LI56 | 04LI56 |
|MAY 28, 2000 | 03:58 PM | 000 | 22TA43 | 22TA43 |
|DEC 21, 2020 | 06:19 PM | 000 | 00AQ29 | 00AQ29 | {{{{
MAR 05, 1226 | 04:10 AM | 000 | 02AQ58 | 02AQ58
MAR 23, 491 | 07:36 AM | 000 | 09AQ31 | 09AQ31
JAN 10, -303 | 02:29 PM | 000 | 04AQ29 | 04AQ29