Orbital Motion GIF Animations
Click on the thumbnail to view the full-resolution GIF movie.
Epicycles & Equants
Calculations of Hipparchan and Ptolemaic epicyclic motions.
- Hipparchan Epicycle and Deferent
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- Ptolemaic Equant, Epicycle, and Deferent
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- Hipparchan Lunar Epicycle (approximate)
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Kepler's 2nd Law
Kepler's second law for eccentricity of e=0.2, 0.4, 0.6, and 0.8
- e=0.2
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- e=0.4
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- e=0.6
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- e=0.8
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Two-Body Orbits (Center of Mass)
Circular (e=0) two-body orbits with mass ratios q=0.02, 0.05, and 0.2
- e=0 q=0.02
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- e=0 q=0.05
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- e=0 q=0.2
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Two-body orbits for e=0.8 and mass-ratio 0.2. The second adds uses a line to connect the two bodies.
- e=0.8 q=0.2
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- e=0.8 q=0.2, line connecting the two bodies
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Example Two-Body Systems
- Earth-Moon System
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- Pluto-Charon System
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- Alberio (Beta Cygni) Binary Star System
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Copyright Notice:
All of these animations are Copyright © Richard W. Pogge, All Rights Reserved.
Use Notes:
These animations were created using Python codes I wrote for this purpose. I need to refine them some before
eventually releasing them on GitHub for more general use.
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Updated: 2021 Sept 5 [tabulizer v1.2]