S2003_J_18 is a natural satellite of Jupiter in the NASA/JPL Solar System Dynamics planetary satellite tables.
- Planet: Jupiter
- Satellite: S2003_J_18
- Satellite code: 555
- 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: 20332800. km
- Eccentricity e: 0.102
- Argument of periapsis ω: 86.2 deg
- Mean anomaly M: 252.5 deg
- Inclination i: 145.7 deg
- Longitude of ascending node: 166.8 deg
- Sidereal period P: 592.3333 days
- Argument of periapsis precession period: 91.2 yr
- Longitude of ascending node precession period: 131.6 yr
- Mean elements reference: 47