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 Invites Media to View Launch of InSight Mars Lander from West Coast
Media accreditation is open for the launch of NASA's next mission to Mars - the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport spacecraft (InSight) from Vandenberg Air Force Base in California.
NASA Awards Contract for Aerospace Systems Modeling, Simulation
NASA has awarded an 8(a) small business set-aside contract to Metis Flight Research Associates LLC of Albuquerque, New Mexico, for support of aerospace systems modeling and simulation facilities at the agency's Ames Research Center in Moffett Field, California.
NASA Invites Media to Discuss First Mission to Study Mars Interior, First Interplanetary Launch from West Coast
NASA's next mission to the Red Planet will be the topic of a media briefing at 5 p.m. EDT (2 p.m. PDT) Thursday, March 29, at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California. The briefing will air live on NASA Television and the agency's website.
Two NASA Astronauts Among Crew Heading to International Space Station
Three crew members, including NASA astronauts Drew Feustel and Ricky Arnold, are on their way to the International Space Station after launching from the Baikonur Cosmodrome in Kazakhstan at 1:44 p.m. EDT Wednesday (11:44 p.m. Baikonur time).
Media Invited to View NASA Spacecraft That Will Touch the Sun
Media are invited to view NASA’s Parker Solar Probe spacecraft at 9:30 a.m. EDT on Wednesday, March 28, at the agency’s Goddard Space Flight Center in Greenbelt, Maryland. The spacecraft will embark this summer on a daring trek, traveling closer to the Sun than any spacecraft in history.
Media Preview of Final Voyage of NASA's Around-the-World Atmospheric Mission
Media are invited to preview the final deployment of one of NASA's most ambitious airborne studies of Earth's atmosphere on Friday, April 13, at Building 703 of NASA's Armstrong Flight Research Center, located in Palmdale, California.
NASA to Launch Parachute Test off Virginia Coast March 27
NASA will test a parachute for possible future missions to Mars from NASA’s Wallops Flight Facility in Virginia on Tuesday, March 27. Live coverage of the test is scheduled to begin at 6:15 a.m. EDT on the Wallops Ustream site.
NASA to Preview Upcoming US Spacewalk, Provide Live Coverage
Two American astronauts will venture outside the International Space Station on Thursday, March 29, for a planned 6.5-hour spacewalk. Experts from NASA will preview this work in a briefing at 2 p.m. EDT Tuesday, March 27, at NASA’s Johnson Space Center in Houston.
Media Invited to View NASA's Mission to Study Mars Interior
Media are invited to view NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander Friday, April 6, at Vandenberg Air Force Base in California, where it's currently undergoing final tests for its May launch.
NASA to Discuss Upcoming Launch of Next Planet Hunter
Join NASA at 1 p.m. EDT Wednesday, March 28, as astrophysics experts discuss the upcoming launch of NASA's next planet hunter, the Transiting Exoplanet Survey Satellite (TESS).