Perihelion: 1,353,572,956 km, 9.04807635 AE
Aphelion: 1,513,325,783 km, 10.11595804 AE
Semi-major axis: 1,433,449,370 km, 9.58201720 AE
Orbital period: 10,832.327 days, 29.657296 years
Synodic period: 378.09 days
Average orbital speed: 9.69 km/s
Mean anomaly: 320.346750°
Inclination: 2.485 240°
Longitude of ascending node: 113.642811°
Argument of perihelion: 336.013862°
Satellites/moons: 60 (Mimas, Enceladus, Tethys, Dione, Rhea, Titan, Hyperion, Iapetus, Erriapus, Phoebe, Janus, Epimetheus, Helene, Telesto, Calypso, Kiviuq, Atlas, Prometheus, Pandora, Pan, Ymir, Paaliaq, Tarvos, Ijiraq, Suttungr, Mundilfari, Albiorix, Skathi, Siarnaq, Thrymr, Narvi, Methone, Pallene, Polydeuces, Daphnis, Aegir, Bebhionn, Bergelmir, Bestla, Farbauti, Fenrir, Fornjot, Hati, Hyrokkin, Kari, Loge, Skoll, Surtur, S/2004 S7, S/2004 S12, S/2004 S13, S/2004 S17, S/2006 S1, S/2006 S3, Greip, Jarnsaxa, Tarqeq, S/2007 S2, S/2007 S3, Anthe)
Equatorial radius: 60,268 km (9.4492 x Earth)
Flattening: 0.09796 ± 0.00018
Surface area: 4.27×1010 km2 (83.703 x Earth)
Volume: 8.2713×1014 km3 (763.59 x Earth)
Mass: 5.6846×1026 kg (95.152 x Earth)
Mean density: 0.687 g/cm3
Equatorial surface gravity: 8.96 m/s2
Escape velocity: 35.5 km/s
Sidereal rotation period: 0.439 – 0.449 day Earth days, 10 h 32 – 47 min) Earth hours
Average surface temperatures: 95 K, -178 °C, -288 °F
Apparent magnitude: +1.2 to -0.24
Angular diameter: 14.5" — 20.1"
Composition: 96.3% Molecular Hydrogen (H2)
0.4% Methane (CH4)
125 ppm Ammonia (NH3)
110 ppm Hydrogen Deuteride (HD)
7ppm Ethane (C2H6)
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NASA Breaking News
International Space Station Crew Invites Public Along for Photographic Trip Around World
NASA astronaut and Expedition 53 Commander Randy Bresnik will spend one full orbit photographing Earth from the International Space Station on Monday, Oct. 23, and he is inviting people around the globe to share images from their Earth-side vantage point on social media.
NASA Awards Launch Services Contract for Sentinel-6A Mission
NASA has selected Space Exploration Technologies (SpaceX) of Hawthorne, California, to provide launch services for the Sentinel-6A mission. Launch is currently targeted for November 2020, on a SpaceX Falcon 9 Full Thrust rocket from Space Launch Complex 4E at Vandenberg Air Force Base in California.
NASA Awards Launch Services Contract for Landsat 9 Mission
NASA has selected United Launch Services LLC (ULS) of Centennial, Colorado, to provide launch services for the Landsat 9 mission. The mission is currently targeted for a contract launch date of June 2021, while protecting for the ability to launch as early as December 2020, on an Atlas V 401 rocket from Space Launch Complex 3E at Vandenberg Air For
Georgia Students to Speak with NASA Astronauts on Space Station
Students at New Prospect Elementary School in Alpharetta, Georgia, will speak with the NASA astronauts living, working and doing research aboard the International Space Station at 10:50 a.m. EDT on Monday, Oct. 23.
NASA Missions Catch First Light from a Gravitational-Wave Event
For the first time, NASA scientists have detected light tied to a gravitational-wave event, thanks to two merging neutron stars in the galaxy NGC 4993, located about 130 million light-years from Earth in the constellation Hydra.
Facebook Live with Astronauts Kicks Off Year of Education on Space Station
The first major event for the Year of Education on Station (YES) will be hosted by NASA astronaut Joe Acaba and ESA (European Space Agency) astronaut Paolo Nespoli on a special Facebook Live broadcast from the International Space Station.
NASA Pinpoints Cause of Earth’s Recent Record Carbon Dioxide Spike
A new NASA study provides space-based evidence that Earth’s tropical regions were the cause of the largest annual increases in atmospheric carbon dioxide concentration seen in at least 2,000 years.
NASA Announces Briefing on Carbon Mission Science Results
NASA will hold a media teleconference at 2 p.m. EDT Thursday, Oct. 12, to discuss new research to be published this week on changing global levels of carbon dioxide in the atmosphere. The research is based on data from NASA’s Orbiting Carbon Observatory-2 (OCO-2) mission and other satellites.
NASA TV to Broadcast Hispanic Heritage Event
NASA will celebrate Hispanic Heritage Month at the James Webb Auditorium in the agency’s headquarters in Washington on Thursday, Oct. 12, with a discussion of the contributions of Hispanics to NASA’s mission and the importance of Hispanic representation in science, technology, engineering and mathematics (STEM) education and careers.
NASA to Televise International Space Station Cargo Ship Launch, Docking
NASA Television will provide live coverage of the launch and docking of a Russian cargo spacecraft delivering almost three tons of food, fuel and supplies to the International Space Station beginning at 5:15 a.m. EDT Thursday, Oct. 12.