S2018_J_4 is a natural satellite of Jupiter in the NASA/JPL Solar System Dynamics planetary satellite tables.
- Planet: Jupiter
- Satellite: S2018_J_4
- Satellite code: 55520
- Physical parameters: not listed in the NASA/JPL planetary satellite physical parameters table
- Ephemeris: JUP347
- Reference frame: ecliptic
- Epoch (TDB): 2000-01-01.5
- Semi-major axis a: 16328500. km
- Eccentricity e: 0.177
- Argument of periapsis ω: 285.0 deg
- Mean anomaly M: 138.3 deg
- Inclination i: 50.2 deg
- Longitude of ascending node: 52.1 deg
- Sidereal period P: 426.2646 days
- Argument of periapsis precession period: 297.2 yr
- Longitude of ascending node precession period: 239.7 yr
- Mean elements reference: 47