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 Swearing-In of New Agency Administrator
Media are invited to see Vice President Mike Pence swear in Jim Bridenstine as NASA’s new administrator at 2:30 p.m. EDT Monday, April 23, at the agency’s headquarters in Washington. The ceremony will air live on NASA Television and the agency’s website.
NASA Awards Construction Contract for Instrument Development Facility
NASA has awarded a contract to the Manhattan Construction Company, of Arlington Virginia, for the construction of the Instrument Development Facility at the agency’s Goddard Space Flight Center in Greenbelt, Maryland.
NASA Astronauts on Space Station to Speak with Students from Florida, Texas
Students from Coral Gables, Florida, and the Texas Gulf Coast will talk with astronauts aboard the International Space Station next week as part of NASA’s Year of Education on Station.
Statements on Jim Bridenstine’s Senate Confirmation as NASA Administrator
The following are statements from Rep. Jim Bridenstine and acting NASA Administrator Robert Lightfoot on Thursday’s U.S. Senate confirmation of Bridenstine as the 13th Administrator for the National Aeronautics and Space Administration:
NASA Planet Hunter on Its Way to Orbit
NASA’s Transiting Exoplanet Survey Satellite (TESS) has launched on the first-of-its-kind mission to find worlds beyond our solar system, including some that could support life.
NASA to Discuss Demonstration of New Space Exploration Power System
Media are invited to attend a news conference at NASA’s Glenn Research Center in Cleveland at 9:15 a.m. EDT Wednesday, May 2, to discuss a recent experiment to demonstrate a new nuclear reactor power system designed for space.
NASA TV Updates Launch Coverage for Planet-Hunting Mission TESS
NASA’s Transiting Exoplanet Survey Satellite (TESS) now is scheduled for launch today at 6:51 p.m. EDT Wednesday, April 18, on a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.
NASA Celebrates Earth Day with #NASA4Earth Tools, Events
This Earth Day, NASA invites you to create your own shareable views of our home planet, help combat mosquito-transmitted diseases, and watch our fleet of Earth-observing spacecraft as they circle the globe.
NASA Television to Air Launch of Next Planet-Hunting Mission
On a mission to detect planets outside of our solar system, NASA’s Transiting Exoplanet Survey Satellite (TESS) is targeted to launch no earlier than 6:51 p.m. EDT Wednesday, April 18.
Maryland, Michigan, Texas Students to Link Up with NASA Astronauts on Space Station
Students from Maryland, Michigan and Texas will talk with astronauts on the International Space Station this week as part of NASA’s Year of Education on Station.