Download or view convergatron.frink in plain text format
// This program calculates the angular separations of all the different
// pairs of planets in the sky (and the moon). The output is a large table
// of separations suitable for graphing.
use planets.frink
df = ### yyyy-MM-dd-HH:mm ###
lp = length[Planet.planetsMinusEarth]
d1 = beginningOfYear[now[]]
d2 = beginningOfYearPlus[now[], 2]
for d = d1 to d2 step 1 day
{
[mra, mdecl] = moonApparentRADecl[d]
for i1 = 0 to lp-1
{
p1 = Planet.planetsMinusEarth@i1
// Check for moon convergences
[ra1, decl1] = p1.geocentricCoordinates[d]
dist = angularSeparation[mra, mdecl, ra1, decl1]
println[(d->df) + "\tMoon\t" + p1.getName[] + "\t" + format[dist,degrees,5]]
// Check for planet-planet convergences
for i2 = i1+1 to lp-1
{
p2 = Planet.planetsMinusEarth@i2
if p1 == p2
next
[ra2, decl2] = p2.geocentricCoordinates[d]
dist = angularSeparation[ra1, decl1, ra2, decl2]
println[(d->df) + "\t" + p1.getName[] + "\t" + p2.getName[] + "\t" + format[dist,degrees,5]]
}
}
}
Download or view convergatron.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 19967 days, 2 hours, 16 minutes ago.