Callisto: outermost Galilean moon, measured and untextured

Measured facts

Classification

Galilean natural satellite

Parent body

Jupiter

Mean radius

2,410 kmPublished mean radius stored as renderer geometry.

Mean diameter

4,821 km

Mean radius in Earth radii

0.378

Appearance

Temporary educational representation

What you are looking at

The outermost orbit means the largest absolute distance from Jupiter, and the archive shows how much that distance changes over the 2020–2040 window.

Its position is composed with the same-epoch Jupiter state each frame, so system-scale navigation stays consistent when the ephemeris date changes.

The rendered sphere is an explicit educational proxy.

Measured distance from Jupiter

These figures are magnitudes of the moon’s Jupiter-centred position vector, sampled once per day across 2020-01-01 00:00 TDB through 2040-01-01 00:00 TDB. They are distances from the centre of Jupiter, not from Earth, and they change because the orbit is not a perfect circle.

Distance from Jupiter at the snapshot epoch

1,893,965.6 km on 2026-08-29Magnitude of the Jupiter-centred position vector at the recorded ephemeris snapshot.

Closest measured approach to Jupiter

1,868,767 km on 2023-02-11

Farthest measured separation from Jupiter

1,896,663.8 km on 2022-11-11

Mean measured separation

1,882,792.8 kmSampled once per day across 2020-01-01 00:00 TDB to 2040-01-01 00:00 TDB (7,306 samples).

Archive cadence and held-out error

12.0 h sampling · 6.0 km worst held-out errorThe archive stores this moon relative to Jupiter so the large planet vector is not repeated per moon.

Delivery and camera limits

The camera stops at 1.08 mean radii for Callisto. Educational geometry limit only; no observational surface imagery is integrated for this body yet.

Appearance status

Temporary educational representation

Renderer provider id

callisto-visual-v1

Geometry

mean-radius-sphereMean-radius sphere; no ellipsoid or terrain displacement yet

Rotation model

IAU_CALLISTO — pck00011 (2022-12-27)Source: https://naif.jpl.nasa.gov/pub/naif/generic_kernels/pck/pck00011.tpc

Limitations COSMOS discloses

• Appearance incomplete; no observational surface or atmosphere claimed
• No surface mosaic is integrated, and the older candidate products vary in resolution.
• No shape model, terrain or albedo variation is claimed.
• Position is interpolated inside 2020-01-01 00:00 TDB through 2040-01-01 00:00 TDB; the ephemeris snapshot labelled 2026-08-29 00:00 TDB is the epoch used for the figures above.