Iocaste

A confirmed moon in the Jupiter system.

Named · Jupiter XXIV · S/2000 J 3

Snapshot 2026-09-09 · catalog 1.0.0

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Physical measurements

Mean radius
— No value in the admitted source set.
GM · gravitational parameter
— No value in the admitted source set.
Mass
— Mass requires an admitted GM estimate.
Mean density
— No value in the admitted source set.

Orbit descriptions

Mean elements describe an average orbit. They are not positions for a chosen date.

JUP347 · ecliptic plane · 2000-01-01.5 TDB
Semimajor axis
21,062,300 km
Sidereal period
624.548 days
Eccentricity
0.223
Inclination to reference plane
148.7°
Argument of periapsis
91.4°
Mean anomaly
182°
Ascending node
268.9°
Apsidal / nodal precession periods
79.2 / 116.3 years
Reference-plane pole RA / Dec
— / —°
Plane tilt to parent equator
—°
Reference center
Not specified in this summary sourceThe summary table identifies a parent system but does not explicitly specify the reference center for each solution. Do not infer a physical-primary center, especially for Pluto’s circumbinary moons.

Orientation

No supported orientation model in the admitted PCK source.

Identity & availability

Stable catalog ID
iocaste
JPL / NAIF satellite ID
524
Names & designations
Iocaste · S/2000 J 3
Discovery / rediscovery years
2000S.S. Sheppard, D.C. Jewitt, Y.R. Fernandez, G. Magnier

No validated dated trajectory admitted in catalog 1.0.0. Mean elements are not ephemerides.

No image or global texture admitted in this catalog release.No environment measurements admitted in this catalog release.

Sources & evidence

  1. JPL discovery circumstancestable tr[28] (zero-based); jupiter / Iocaste · References: IAUC 7555
  2. MPC planetary satellite listitems[21]; Jupiter 24
  3. MPC satellite namesitems[78]; Jupiter 24
  4. JPL mean orbital elements#sat_elem row ID=26; Jupiter / Iocaste / NAIF 524 · References: 47

Full catalog, uncertainty and source manifests · All Jupiter moons · Moon model limits