Download or view convergatron2.frink in plain text format
// This program is a simplified version of the full convergatron.frink program
// intended to debunk the myth that I've seen copied by lots of journalists
// today that the upcoming Moon-Jupiter convergence is the closest until 2026,
// like: http://newswatch.nationalgeographic.com/2013/01/19/sky-show-jupiter-and-moon-closest-until-2026/
use planets.frink
df = ### yyyy-MM-dd-HH:mm ###
d = beginningOfYear[now[]]
e = beginningOfYearPlus[now[], 2]
while d < e
{
[mra, mdecl] = moonApparentRADecl[d]
p1 = Planet.Jupiter
// Check for moon convergences
[ra1, decl1] = p1.geocentricCoordinates[d]
dist = angularSeparation[mra, mdecl, ra1, decl1]
print[(d->df) + "\tMoon\t" + p1.getName[] + "\t" + format[dist,degrees,5]]
// Use adaptive step when we get close; the moon moves about 12 degrees/day
// so we want to take smaller steps.
if dist < 1 degree
{
d = d + 10 min
print["\t*"]
} else
if dist < 20 degrees
d = d + 1 hour
else
d = d + 1 day
println[]
}
Download or view convergatron2.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 19965 days, 0 hours, 21 minutes ago.