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
Media Invited to Demonstration of NASA UAS Traffic Management Technologies
Media are invited to see the latest technologies NASA is working on as part of its Unmanned Aircraft System (UAS) Traffic Management (UTM) project Thursday, May 25, at the Reno-Stead Airport in Reno, Nevada.
NASA TV Coverage Set for May 23 Space Station Contingency Spacewalk
NASA astronauts Peggy Whitson and Jack Fischer are preparing for an unscheduled spacewalk outside the International Space Station Tuesday, May 23. Live coverage will begin at 6:30 a.m. EDT on NASA Television and the agency’s website.
NASA to Discuss First Science Results from Juno Mission to Jupiter
Scientists from NASA’s Juno mission to Jupiter will discuss their first in-depth science results in a media teleconference at 2 p.m. EDT Thursday, May 25, when multiple papers with early findings will be published online by the journal Science and Geophysical Research Letters.
NASA to Discuss FY2018 Budget Proposal, Provide Virtual Tours of Centers
NASA will hold a series of events May 23, highlighting the agency’s Fiscal Year 2018 budget proposal, including a televised State of NASA address by acting Administrator Robert Lightfoot and Facebook Live virtual tours of NASA’s 10 centers, where innovation is enabling exploration and discovery.
Two NASA Astronauts Inducted into U.S. Astronaut Hall of Fame
Two veteran NASA astronauts, Ellen Ochoa and Michael Foale, joined the ranks of the U.S. Astronaut Hall of Fame Friday.
NASA Highlights Science on Next Resupply Mission to International Space Station
NASA will host a media teleconference at 10 a.m. EDT Friday, May 26, to discuss select science investigations launching on the next SpaceX commercial resupply flight to the International Space Station.
NASA Selects Facilities Operations, Maintenance Support Services Contractor
NASA has selected URS Federal Services Inc. of Germantown, Maryland, to provide facilities operations and maintenance support services at the agency’s Marshall Space Flight Center in Huntsville, Alabama.
Utah Students to Speak to NASA Astronauts on International Space Station
Utah students will speak with NASA astronauts living and working aboard the International Space Station at 12:40 p.m. EDT Friday, May 19. The 20-minute, Earth-to-space call will air live on NASA Television and the agency’s website.
NASA Astronauts Inducted into Hall of Fame, Live May 19 on NASA Television
Two NASA astronauts, both with one-of-a-kind career credits, will be honored Friday, May 19, when they are inducted into the U.S. Astronaut Hall of Fame. The ceremony will air live on NASA Television and the agency’s website at 1 p.m. EDT.
NASA Holds Media Teleconference Today on Exploration Mission-1 Status
NASA will provide an update on the status of Exploration Mission-1, the first integrated flight of NASA’s Space Launch System (SLS) rocket and Orion spacecraft, during a media teleconference at 3 p.m. EDT today, May 12.