Uranus

This article, about a planet, is a stub. You can help Orbiterwiki by expanding it. Uranus Uranus in Orbiter Designation Name Uranus Reference body Sun Number of satellites Planetary mean orbits Epoch J2000 (1 January 2000) Semimajor axis (a) 2.87097222×1012 m (19.19126393 AU) Eccentricity (e) 0.04716771 Inclination (i) 0.76986° (0.01343659 radian) Longitude of the ascending node (LAN, ☊) 74.22988° (1.295558 radian) Longitude of periapsis (ϖ) 170.96424° (2.983889 radian) Mean longitude (L) 313.23218° (5.4669329 radian) Planetary orbital element centennial rates Semimajor axis (a) 0.00152025 AU/Century Eccentricity (e) -0.00019150 Century-1 Inclination (i) -2.09 seconds/Century Longitude of the ascending node (LAN, ☊) -1681.40 seconds/Century Longitude of periapsis (ϖ) 1312.56 seconds/Century Mean longitude (L) 1542547.79 seconds/Century Selected physical parameters Mean radius 25362.0±12 km Mass 8.6832054×1025 kg Density 1.318 g/cm3 Sidereal rotation period 17.24±0.01 hours Sidereal orbit period 83.747407 years Magnitude V(1,0) -7.19 Geometric albedo 0.51 Equatorial gravity 8.69±0.001 m/s2 Escape velocity 21.3 km/s Rotation elements North pole right ascension (α) 259.29° North pole declination (δ) -15.09° Obliqutiy of ecliptic 82.19° Longitude of Sun's transit 167.62° Atmospheric parameters Surface Pressure >>104 kPa Surface Density ~0.42 kg/m3 at 1 bar Scale height 27.7 km Average temperature ~58 K Wind speeds 0.200 m/s Ecliptic position from primary* Note *Elements given are from Orbiter.pdf (2016) Uranus is the 7th planet from the Sun, the third largest in diameter, and the fourth largest in mass. The planet boasts a ring system and 28 known satellites. William Herschel discovered Uranus on 13 March 1781, although he thought it was a comet for some time. Later, it was realized that it was observed several times by others, but, not recognized as a planet. It is just barely visible in a dark sky. Uranus is unique in that the polar axis is tilted some 97° to it's orbit. Uranus in Orbiter Uranus has been a part of Orbiter since the beginning with the release of Orbiter 2001. See also Uranus at Wikipedia : Uranus's natural satellites Named Satellites: Ariel | Belinda | Bianca | Caliban | Cordelia | Cressida | Cupid | Desdemona | Ferdinand | Francisco | Juliet | Mab | Margaret | Miranda | Oberon | Ophelia | Perdita | Portia | Prospero | Puck | Rosalind | Setebos | Stephano | Sycorax | Titania | Trinculo | Umbriel Numbered Satellites: S/2023 U 1 See also: Pronunciation key | rings of Uranus The Solar System Central star Sun (Sol) Planets Mercury - Venus - Earth - Mars - Jupiter - Saturn - Uranus - Neptune Natural satellites Moon - Phobos - Deimos - Io - Europa - Ganymede - Titan - more... Add-ons Planets - Dwarf Planets - Small objects - Natural satellites - Alternative star systems