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How to Explore Algol Eclipsing Binary 3D Explorer

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Open the Algol Eclipsing Binary 3D Explorer, scrub the phase slider or press Play, and read the published magnitude, period, and eclipse figures as the light curve dips.

  1. Open https://freetoolonline.com/space-3d/algol-eclipsing-binary.html and wait for the two orbiting stars to render.
  2. Scrub the phase slider to phase 0% and watch Algol B pass in front of Algol A - the deep primary eclipse.
  3. Scrub to phase 50% and watch the much shallower secondary eclipse, when Algol A passes in front of Algol B.
  4. Press Play orbit to run one full 2.867-day orbit automatically and follow the light-curve dip below the scene.
  5. Press Top view to see why the eclipse happens; press Eclipse view to return to the observer's viewing angle.
  6. Read the facts panel for the current eclipse state plus the published period, magnitude, distance, and star figures.

Key published figures

FigureValue
Orbital period2.867 days
Magnitude range2.1 to 3.4
Primary eclipse durationabout 10 hours
Distanceabout 90 light-years
Algol A / Algol B~3.17 / ~0.70 solar masses, B8V / K0IV

Next: the when guide or vs alternatives. Open the Algol Eclipsing Binary 3D Explorer.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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