User:Amit6/infuranus

Uranus
	Uranus, as seen by Voyager 2
Discovery
Discovered by	William Herschel
Discovery date	March 13, 1781
Designations
Adjectives	Uranian
Symbol
Orbital characteristics[a]
	Epoch J2000
Aphelion	3,004,419,704 km; 20.083 305 26 AU
Perihelion	2,748,938,461 km; 18.375 518 63 AU
Semi-major axis	2,876,679,082 km; 19.229 411 95 AU
Eccentricity	0.044 405 586
Orbital period (sidereal)	30,799.095 days; 84.323 326 yr
Orbital period (synodic)	369.66 days
Average orbital speed	6.81 km/s
Mean anomaly	142.955 717°
Inclination	0.772 556°; 6.48° to Sun's equator
Longitude of ascending node	73.989 821°
Argument of perihelion	96.541 318°
Known satellites	27
Physical characteristics
Equatorial radius	25,559 ± 4 km; 4.007 Earths[c]
Polar radius	24,973 ± 20 km; 3.929 Earths[c]
Flattening	0.022 9 ± 0.000 8[b]
Surface area	8.115 6×109 km²[c]; 15.91 Earths
Volume	6.833×1013 km³[c]; 63.086 Earths
Mass	(8.6810 ± 0.0013)×1025 kg; 14.536 Earths; GM=5 793 939 ± 13 km³/s²
Mean density	1.27 g/cm³[c]
Surface gravity	8.69 m/s²[c]; 0.886 g
Escape velocity	21.3 km/s[c]
Sidereal rotation period	−0.718 33 day; 17 h 14 min 24 s
Equatorial rotation velocity	2.59 km/s; 9,320 km/h
Axial tilt	97.77°
North pole right ascension	17 h 9 min 15 s; 257.311°
North pole declination	−15.175°
Albedo	0.300 (bond); 0.51 (geom.)
Apparent magnitude	5.9 to 5.32
Angular diameter	3.3"–4.1"
Atmosphere[d]
Scale height	27.7 km
Composition by volume	(Below 1.3 bar)
83 ± 3%	Hydrogen (H2)
15 ± 3%	Helium
2.3%	Methane
0.009%; (0.007–0.015%)	Hydrogen deuteride (HD)
Ices:
	Ammonia
	water
	ammonium hydrosulfide (NH4SH)
	methane (CH4)

^ Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. Retrieved 2007-08-08. — At the site, go to the "web interface" then select "Ephemeris Type: ELEMENTS", "Target Body: Uranus Barycenter" and "Center: Sun".
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Williams, Dr. David R. (January 31, 2005). "Uranus Fact Sheet". NASA. Retrieved 2007-08-10.
^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Seidelmann2007 was invoked but never defined (see the help page).
^ Munsell, Kirk (May 14, 2007). "NASA: Solar System Exploration: Planets: Uranus: Facts & Figures". NASA. Retrieved 2007-08-13.
^ Cite error: The named reference Jacobson1992 was invoked but never defined (see the help page).
^ Cite error: The named reference Podolak1995 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Lunine1993 was invoked but never defined (see the help page).
^ Cite error: The named reference ephemeris was invoked but never defined (see the help page).
^ Cite error: The named reference Lindal1987 was invoked but never defined (see the help page).
^ Cite error: The named reference Conrath1987 was invoked but never defined (see the help page).
^ Feuchtgruber, H. (1999). "Detection of HD in the atmospheres of Uranus and Neptune: a new determination of the D/H ratio". Astronomy and Astrophysics. 341: L17–L21. Bibcode:1999A&A...341L..17F. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)

[horizons-1] Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. Retrieved 2007-08-08. — At the site, go to the "web interface" then select "Ephemeris Type: ELEMENTS", "Target Body: Uranus Barycenter" and "Center: Sun".

[fact-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Williams, Dr. David R. (January 31, 2005). "Uranus Fact Sheet". NASA. Retrieved 2007-08-10.

[Seidelmann2007-3] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Seidelmann2007 was invoked but never defined (see the help page).

[nasafact-4] Munsell, Kirk (May 14, 2007). "NASA: Solar System Exploration: Planets: Uranus: Facts & Figures". NASA. Retrieved 2007-08-13.

[Jacobson1992-5] Cite error: The named reference Jacobson1992 was invoked but never defined (see the help page).

[Podolak1995-6] Cite error: The named reference Podolak1995 was invoked but never defined (see the help page).

[Lunine1993-7] Cite error: The named reference Lunine1993 was invoked but never defined (see the help page).

[ephemeris-8] Cite error: The named reference ephemeris was invoked but never defined (see the help page).

[Lindal1987-9] Cite error: The named reference Lindal1987 was invoked but never defined (see the help page).

[Conrath1987-10] Cite error: The named reference Conrath1987 was invoked but never defined (see the help page).

[Feuchtgruber1999-11] Feuchtgruber, H. (1999). "Detection of HD in the atmospheres of Uranus and Neptune: a new determination of the D/H ratio". Astronomy and Astrophysics. 341: L17–L21. Bibcode:1999A&A...341L..17F. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)

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