S2020_S_21 is a natural satellite of Saturn in the NASA/JPL Solar System Dynamics planetary satellite tables.
- Planet: Saturn
- Satellite: S2020_S_21
- Satellite code: 65212
- Physical parameters: not listed in the NASA/JPL planetary satellite physical parameters table
- Ephemeris: SAT455
- Reference frame: ecliptic
- Epoch (TDB): 2000-01-01.5
- Semi-major axis a: 18862100. km
- Eccentricity e: 0.307
- Argument of periapsis ω: 188.0 deg
- Mean anomaly M: 95.5 deg
- Inclination i: 169.9 deg
- Longitude of ascending node: 328.3 deg
- Sidereal period P: 967.2604 days
- Argument of periapsis precession period: 210.6 yr
- Longitude of ascending node precession period: 369.2 yr
- Mean elements reference: 46