Category : Science and Education
Archive   : ODE26.ZIP
Filename : BINARY.ODE

 
Output of file : BINARY.ODE contained in archive : ODE26.ZIP
# BINARY.ODE
# Planetary orbit in binary star system
# Plot x against y

# Use 5th order Runge-Kutta, auto step-size, 500 steps
$m 6
$n 500

#Solve to 20
$t 20

# (x,y) is position of the planet; (vx,vy) its velocity.
x = 1
y = 0
vx = 0
vy = 1.155, 1.160, 1.165 # notice sensitivity to initial values!

# Binary star centres are at (0,0) and (-5,0)
r13 = cub(sqrt(sqr(x)+ sqr(y)))
r23 = cub(sqrt(sqr(x+5)+sqr(y)))

x' = vx
y' = vy

# Newton's Law
vx' = -x/r13 - (x+5)/r23
vy' = -y/r13 - y/r23


  3 Responses to “Category : Science and Education
Archive   : ODE26.ZIP
Filename : BINARY.ODE
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/