2.4.1 spase://CNES/NumericalData/CDPP-AMDA/Ephemerides/dione-orb-all Dione 2023-03-08T16:31:16Z Dione orbits Saturn with a semimajor axis about 2% less than that of the Moon. However, reflecting Saturn's greater mass (95 times that of Earth's), Dione's orbital period is one tenth that of the Moon. Dione is currently in a 1:2 mean-motion orbital resonance with moon Enceladus, completing one orbit of Saturn for every two orbits completed by Enceladus. This resonance maintains Enceladus's orbital eccentricity (0.0047), providing a source of heat for Enceladus's extensive geological activity, which shows up most dramatically in its cryovolcanic geyser-like jets. The resonance also maintains a smaller eccentricity in Dione's orbit (0.0022), tidally heating it as well. Dione has two co-orbital, or trojan, moons, Helene and Polydeuces. They are located within Dione's Lagrangian points L4 and L5, 60 degrees ahead of and behind Dione respectively. spase://CNES/Person/CDPP-AMDA/NAIF PrincipalInvestigator sat-moons-orb PartOf Saturn Moons spase://SMWG/Repository/CDPP/AMDA Online Open CDPP/AMDA HAPI Server https://amda.irap.omp.eu/service/hapi dione-orb-all Web Service to this product using the HAPI interface. CSV Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse". See the Rules of the road at https://amda.cdpp.eu/help/policy.html . Please acknowledge the Data Providers. spase://SMWG/Repository/CDPP/AMDA Online Open CDPP/AMDA Web application https://amda.cdpp.eu Access to Data via CDPP/AMDA Web application. CSV VOTable CDF PNG Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse". See the Rules of the road at https://amda.cdpp.eu/help/policy.html . Please acknowledge the Data Providers. SPICE spase://CNES/Instrument/CDPP-AMDA/Ephemerides Ephemeris 1970-01-01T00:00:00Z 2035-01-19T23:19:31Z PT20M Saturn Saturn.Dione distance dione-saturn dio_sat_r Rs TimeSeries Positional xyz_ksm dio_sat_ksm Rs Cartesian KSM TimeSeries 3 x 1 dio_sat_ksm(0) y 2 dio_sat_ksm(1) z 3 dio_sat_ksm(2) Positional xyz_kso dio_sat_kso Rs Cartesian KSO TimeSeries 3 x 1 dio_sat_kso(0) y 2 dio_sat_kso(1) z 3 dio_sat_kso(2) Positional xyz_IAU_saturn dio_sat_xyz Rs TimeSeries 3 x 1 dio_sat_xyz(0) y 2 dio_sat_xyz(1) z 3 dio_sat_xyz(2) Positional latitude IAU_saturn dio_sat_lat deg Positional longitude IAU_saturn dio_sat_lon deg Positional