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How to Explore Pluto-Charon Double Planet 3D Explorer
Open the Pluto-Charon Double Planet 3D Explorer, scrub orbital phase, then play or pause as Pluto and Charon circle the outside-Pluto barycenter.
- Open https://freetoolonline.com/space-3d/pluto-charon-double-planet.html and wait for Pluto, Charon, the green barycenter marker, and both orbit paths to paint.
- Drag Orbital phase from 0% toward 50% and watch the worlds move to opposite sides of the barycenter while face markers stay pointed at each other.
- Press Play (or Pause) and watch phase climb through a full mutual orbit; or keep scrubbing by hand.
- Reset to restart at phase 0%, then read the facts panel for 1188.3 km, 606 km, ~8.2:1 mass ratio, ~19,591 km separation, ~2,110 km barycenter distance, and 6.387 days.
- Compare mentally with Earth-Moon (barycenter inside Earth) and with a dwarf-planet size lineup on the sibling pages linked below.
Key published figures
| Figure | Value |
|---|---|
| Pluto mean radius | 1188.3 km |
| Charon mean radius | 606 km |
| Pluto / Charon mass | 1.303e22 kg / 1.586e21 kg (~8.2:1) |
| Mutual separation | ~19,591 km |
| Barycenter from Pluto center | ~2,110 km (outside Pluto) |
| Synchronous period | 6.387 days (both tidally locked) |
Next: the when guide or vs alternatives. Open the Pluto-Charon Double Planet 3D Explorer.
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