Sun-Moon Horizon Diagram for EDU
 sunMoonHorizonDiagram002view, link (19.2 KB, 400400) source (126.5 KB)Mon, 13 Jun 05, 7:21pm UTC 

flashvars parameters:

  • sunAngle: measured from meridian CCW about NCP axis
  • moonAngle: same as sunAngle
  • viewerAzimuth: azimuthal angle of viewer, measured from north CW about zenith axis
  • viewerAltitude: altitude from horizon plane
  • latitude: observer latitude


  • all angles are in degrees
  • the sun and moon are always on the celestial equator
  • only sunAngle and moonAngle are required, failure to supply legal values causes an error message to be displayed
  • default viewing angles are determined by the sun and moon angles
  • default latitude is 41° N

version 001 below lets you adjust the parameters using sliders