Local Coordinates Model Documents

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Main Document

Local Coordinates Model 

written by Mario Belloni and Todd Timberlake

The Local Coordinates model displays the position of a star in local (Altitude/Azimuth) coordinates. The horizon is shown along with the four cardinal directions (N, E, S, and W). The latitude of the observer is set at 35.5 degrees which sets the location of the north celestial pole (teal) relative to the northern horizon. The position of the star can be changed by using the Altitude and Azimuth sliders.

The Local Coordinates model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_astronomy_Local Coordinates.jar file will run the program if Java is installed.  EJS is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.

Last Modified July 15, 2013

This file has previous versions.

Source Code Documents

Local Coordinates Model Source Code 

Source Code for the Local Coordinates Model program.

Published January 2, 2010
Last Modified January 2, 2010