planetLocations.frink

View or download planetLocations.frink in plain text format


// Calculate and print the positions of the planets as seen from any location
// on earth at the specified time.
//
// The program displays the azimuth, altitude, distance, and apparent magnitude
// of each planet along with an asterisk to indicate if it's above the horizon
// at the current time.
//
// These calculations correct for refraction, parallax, nutation, and other
// subtle effects.

use planets.frink

lat = 39.58563 degrees North
long = 104.89581 degrees West

time = now[]

println["\tAzimuth\t\tAltitude\tDistance (au)\tMagnitude"]
for planet = Planet.planetsMinusEarth
{
   [az, alt] = planet.refractedAzimuthAltitude[time, lat, long]
   distance = padLeft[format[trueDistance[time, Planet.Earth, planet], au, 9], 12, " "]
   mag = padLeft[format[planet.getMagnitude[time], 1, 1], 4, " "]
   println[planet.getName[] + "\t" + padLeft[format[(az + 180 degrees) mod circle, degrees, 6], 10, " "] + "\t" + padLeft[format[alt,degrees,6], 10, " "] + "\t$distance\t$mag\t" + (alt > 0 degrees ? "*" : "")]
}


View or download planetLocations.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 17651 days, 5 hours, 16 minutes ago.