Detail Page

Item Picture
Superior Ptolemaic Model
written by Todd Timberlake
The Ejs Superior Ptolemaic model illustrates Ptolemy's orbit for a superior planet. The model consists of a deferent circle, centered on a point some distance from Earth (at the eccentric point). Attached to this deferent is the center of another circle, the epicycle. The center of the epicycle moves around the deferent with constant angular speed as seen from the equant point, which is exactly opposite the center of the deferent from Earth (so the center of the epicycle does not move at constant speed along the deferent). The planet moves along the epicycle at constant speed. This model is capable of reproducing retrograde motion and variations in the planet's brightness. It can also reproduce variations in the apparent size and spacing of the retrograde arcs. In this simulation the planet is assumed to move in the plane of the ecliptic, so its latitude is always zero. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.

Ejs Superior Ptolemaic 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_SuperiorPtolemaic.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.  Additional Ejs models for astronomy are available.  They can be found by searching ComPADRE for  Open Source Physics, OSP, or Ejs.

Please note that this resource requires at least version 1.5 of Java (JRE).
1 supplemental document is available
1 source code document is available
Subjects Levels Resource Types
Astronomy
- Astronomy Education
= Curricula
- Solar System
= Earth
= Jupiter
= Mars
= Saturn
- Lower Undergraduate
- Middle School
- High School
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Educators
- Learners
- General Publics
- application/java
  • Currently 0.0/5

Want to rate this material?
Login here!


Access Rights:
Free access
License:
This material is released under a Creative Commons Attribution 3.0 license.
Rights Holder:
Todd Timberlake
Keywords:
EJS, Easy Java Simulations, OSP, Open Source Physics, Ptolemaic, Ptolemy, superior
Record Cloner:
Metadata instance created August 18, 2009 by Mario Belloni
Record Updated:
December 2, 2021 by Lyle Barbato
Last Update
when Cataloged:
August 18, 2009
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
T. Timberlake, Computer Program SUPERIOR PTOLEMAIC MODEL, Version 1.0 (2009), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282).
AJP/PRST-PER
T. Timberlake, Computer Program SUPERIOR PTOLEMAIC MODEL, Version 1.0 (2009), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282>.
APA Format
Timberlake, T. (2009). Superior Ptolemaic Model (Version 1.0) [Computer software]. Retrieved March 19, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282
Chicago Format
Timberlake, Todd. "Superior Ptolemaic Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282 (accessed 19 March 2024).
MLA Format
Timberlake, Todd. Superior Ptolemaic Model. Vers. 1.0. Computer software. 2009. Java (JRE) 1.5. 19 Mar. 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282>.
BibTeX Export Format
@misc{ Author = "Todd Timberlake", Title = {Superior Ptolemaic Model}, Month = {August}, Year = {2009} }
Refer Export Format

%A Todd Timberlake %T Superior Ptolemaic Model %D August 18, 2009 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282 %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Timberlake, Todd %D August 18, 2009 %T Superior Ptolemaic Model %7 1.0 %8 August 18, 2009 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9381&DocID=1282


Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Style.org: Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

This resource is stored in 6 shared folders.

You must login to access shared folders.

Superior Ptolemaic Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the EJS Superior Ptolemaic Model.

relation by Mario Belloni

Know of another related resource? Login to relate this resource to it.
Save to my folders

Supplements

Contribute

Related Materials

Similar Materials