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February 3, 2017 01:12
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//introduction to orb.js | |
// https://github.com/lizard-isana/orb.js | |
// Planet Position | |
var date = new Date(); | |
var time = new Orb.Time(date); | |
var SS = new Orb.SolarSystem(); | |
var mars = new SS.Mars(); | |
var p1 = mars.position.ecliptic(time); // x, y, z | |
var p2 = mars.position.equatorial(time); // ra, dec, distance | |
// From Keplarian Elements | |
var asteroid = new SS.FromKeplarian({ | |
"eccentricity":"0.08728849329001058", | |
"inclination":"6.812676631845272", | |
"longitude_of_ascending_node":"250.5660658100269", | |
"argument_of_periapsis":"95.63473165761138", | |
"time_of_periapsis":"2456918.756066796", | |
"semi_major_axis":"1.001911878091084" | |
}); | |
var p3 = asteroid.position.ecliptic(time); // x, y, z | |
var p4 = asteroid.position.equatorial(time); // ra, dec, distance | |
// Artificial Satellites from TLE (TWO LINE ELEMENTS) | |
var tle = { | |
first_line:"1 25544U 98067A 15012.59173611 .00014829 00000-0 23845-3 0 7179", | |
second_line:"2 25544 051.6466 140.7335 0006107 243.2909 291.5211 15.53213268923827" | |
} | |
var satellite = new Orb.Satellite(tle); | |
var p5 = satellite.position.geographic(time); // latitude, longitude, altitude | |
var p6 = satellite.position.rectangular(time); // x, y, z | |
// Horizontal Coodinates | |
var observer = { | |
"latitude":35.658, | |
"longitude":139.741, | |
"altitude":0 | |
} | |
var obs1 = new Orb.Observation({"observer":observer,"target":mars}); | |
var p7 = obs1.horizontal(time); // azimuth, elevation | |
// same as artificial satellites | |
var obs2 = new Orb.Observation({"observer":observer,"target":satellite}); | |
var p8 = obs2.horizontal(time); // azimuth, elevation | |
// from ra/dec | |
var obs3 = new Orb.Observation({ | |
"observer":observer , | |
"target":{"ra":0,"dec":0} | |
}); | |
var p9 = obs3.horizontal(time); // azimuth, elevation | |
// Have fun! |
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