Perihelion: 2,748,938,461 km, 18.37551863 AE
Aphelion: 3,004,419,704 km, 20.08330526 AE
Semi-major axis: 2,876,679,082 km, 19.22941195 AE
Orbital period: 30,799.095 days, 84.323326 years
Synodic period: 369.66 days
Average orbital speed: 6.81 km/s
Mean anomaly: 142.955717°
Inclination: 0.772 556°
Longitude of ascending node: 73.989821°
Argument of perihelion: 96.541 318°
Satellites/moons: 27 (Cordelia, Ophelia, Bianca, Cressida, Desdemona, Juliet, Portia, Rosalind, Mab, Belinda, Perdita, Puck, Cupid, Miranda, Francisco, Ariel, Umbriel, Titania, Oberon, Caliban, Stephano, Trinculo, Sycorax, Margaret, Prospero, Setebos, Ferdinand)
Equatorial radius: 25,559 km (4.007 x Earth)
Flattening: 0.0229 ± 0.0008
Surface area: 8.1156×109 km2 (15.91 x Earth)
Volume: 6.833×1013 km3 (63.086 x Earth)
Mass: 8.6823×1025 kg (14.536 x Earth)
Mean density: 1.27 g/cm3
Equatorial surface gravity: 8.69 m/s2
Escape velocity: 21.3 km/s
Sidereal rotation period: −0.71833 day Earth days, 17 h 14 min 24 s Earth hours
Average surface temperatures: 57 K, -216 °C, -357 °F
Apparent magnitude: 5.9 to 5.32
Angular diameter: 3.3"–4.1"
Composition: 82.5% Hydrogen (H2)
2.3% Methane (CH4)
148ppm Hydrogen Deuteride (HD)
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NASA Breaking News
NASA Awards Engineering Services and Science Capability Contract
NASA has selected Jacobs Technology of Tullahoma, Tennessee, to provide a broad spectrum of engineering and scientific support services at Marshall Space Flight Center in Huntsville, Alabama and the Michoud Assembly Facility in New Orleans.
NASA Astronauts Available for Interviews Before Space Station Mission
NASA astronauts Mark Vande Hei and Joe Acaba, who are making final preparations for a Sept. 12 launch to the International Space Station, will be available for live satellite interviews at 7 and 9 a.m. EDT, respectively, on Friday, Sept. 1.
NASA Successfully Launches Latest Communications Satellite
NASA’s Tracking and Data Relay Satellite-M (TDRS-M), which is the third and final in a series of next generation communications satellites, has successfully been placed into orbit following separation from an United Launch Alliance (ULA) Atlas V rocket.
2017 Astronaut Candidates Available for Interviews Before Training
NASA’s newest astronaut candidates, a diverse dozen women and men, will participate in media interviews and a final news conference before training on Tuesday, Aug. 22, at the agency’s Johnson Space Center in Houston.
NASA Awards Contract for Infrastructure, Applications, Communications
NASA has awarded the Kennedy Infrastructure, Applications and Communication (KIAC) contract to ASRC Federal Data Solutions, LLC of Beltsville, Maryland.
NASA Awards Contract to Extend Operations of Research, Development Center
NASA has awarded a contract to the California Institute of Technology (Caltech) in Pasadena, California, to extend operations of the agency’s Jet Propulsion Laboratory (JPL), also in Pasadena, through Sept. 30, 2018.
NASA Television to Air Launch of Next Communications Satellite
NASA is targeting 8:03 a.m. EDT Friday, Aug. 18, for the launch of its next Tracking and Data Relay Satellite (TDRS) mission atop a United Launch Alliance Atlas V rocket from Cape Canaveral Air Force Station in Florida. The launch, and related activities that begin Thursday, Aug. 17, will air live on NASA Television and the agency’s website.
NASA Signs Combined Data Services Agreement for Polar Satellite Program
NASA has procured combined data support services under an agreement with the Norwegian Space Centre in Oslo, Norway, for the Joint Polar Satellite System (JPSS) program and various cooperative international missions. This action is supported under an international agreement between the United States and Norway.
NASA Cargo Launches to Space Station Aboard SpaceX Resupply Mission
Experiments seeking a better understanding of Parkinson’s disease and the origin of cosmic rays are on their way to the International Space Station aboard a SpaceX Dragon spacecraft following today’s 12:31 p.m. EDT launch.
NASA Announces Television Coverage for Aug. 21 Solar Eclipse
On Monday, Aug. 21, all of North America will be treated to an eclipse of the Sun, and NASA Television will carry it live from coast to coast from unique vantage points on the ground and from aircraft and spacecraft, including the International Space Station. Coverage will be featured during the live four-hour broadcast Eclipse Across America: Thro